during resting membrane potential all the na channels are closed group of answer choices true false
Answers
During resting membrane potential, all the Na+ channels are closed, the given statement is true because Na+ ion channels present in the plasma membrane remain closed during resting membrane potential or resting state.
During resting membrane potential, ions move across the membrane through protein channels. During this state, cells maintain an electrical gradient across the membrane due to the uneven distribution of ions on either side of the membrane.These ion channels may be either closed or open, depending on the relative concentration of ions on either side of the membrane. If the concentration of ions is not in equilibrium, then the ion channels remain in their closed state.
The movement of ions across the membrane is responsible for generating action potentials that are essential for nerve conduction and muscle contraction. The concentration gradient of ions is maintained by ion pumps that actively transport ions against the concentration gradient. Hence, during resting membrane potential, all the Na+ channels are closed as they are not required for ion transport or conduction. So therefore the given statement is true because Na+ ion channels present in the plasma membrane remain closed during resting membrane potential or resting state.
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Related Questions
Which of the following is a cellular structure responsible for protein production
Answers
These absorbances vary because while each of the solutions have the same concentration, path length, and wavelength of monochromatic light, they will all have different _________________________________ (which is a constant for that depends upon the identity of the solution in beer's law calculations).
Answers
These absorbances vary because while each of the solutions have the same concentration, path length, and wavelength of monochromatic light, they will all have different molar absorptivity values (which is a constant for that depends upon the identity of the solution in beer's law calculations).
Molar absorptivity, also known as extinction coefficient, is a measure of how strongly a substance absorbs light at a particular wavelength. This value depends on the chemical structure of the substance and its electronic transitions. Therefore, solutions with different chemical identities will have different molar absorptivity values, resulting in varying levels of absorbance despite having the same concentration, path length, and wavelength of light.
The missing term in your question is "molar absorptivity" or "molar absorption coefficient." These absorbances vary because while each of the solutions has the same concentration, path length, and wavelength of monochromatic light, they will all have different molar absorptivities (which is a constant that depends upon the identity of the solution in Beer's Law calculations). Molar absorptivity is a measure of how well a substance absorbs light at a specific wavelength and is unique to each substance, which causes the observed variation in absorbance.
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How many calories per day would a 5 month old, 7 kg infant need based on 108 calories per kg? Round to the nearest whole calorie. A recipe contains a total of 100 grams of fat. The recipe feeds 4 people. How many grams of fat is in each serving?
Answers
A 5-month-old, 7 kg infant would need 756 calories per day.
Each serving of the recipe would contain 25 grams of fat.
To calculate the number of calories per day that a 5-month-old infant would need based on 108 calories per kg, we can use the infant's weight of 7 kg:
Calories per day = Weight (kg) x Calories per kg
Calories per day = 7 kg x 108 calories/kg
Calories per day ≈ 756 calories
Therefore, a 5-month-old, 7 kg infant would need approximately 756 calories per day.
To determine the number of grams of fat in each serving of a recipe that contains a total of 100 grams of fat and feeds 4 people, we divide the total fat by the number of servings:
Grams of fat per serving = Total grams of fat / Number of servings
Grams of fat per serving = 100 grams / 4 servings
Grams of fat per serving = 25 grams
Therefore, each serving of the recipe would contain 25 grams of fat.
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prokaryotic cells have a single circular chromosome and a defined nucleus? true or false?
Answers
Answer:
False, it lacks a defined nucleus.
Explanation: By definition, prokaryotes lack a membrane-bound nucleus to hold their chromosomes. Prokaryotes generally have a single circular chromosome that occupies a region of the cytoplasm called a nucleoid. They also may contain small rings of double-stranded extra-chromosomal DNA called plasmids.
Answer:
False
Explanation:
Prokaryotic cells don't have a nucleus, they have a nucleoid region
Select all that apply.
The pancreas and liver _____.
a-digest food
b-secrete enzymes and bile
c-help the small intestine digest food
d-are not part of the digestive system
e-help the large intestine digest food
Answers
Answer:
b - Secrete enzymes and bile.
The pancreas secretes digestive enzymes into the small intestine, these enzymes are crucial for the digestion of proteins and polysaccharides. The liver secretes bile into the small intestine, which is necessary for the absorption of dietary fats.
Restriction enzymes Group of answer choices stop transcription and translation. facilitate nucleotide base pairing. bind together strands of DNA. cut DNA at specific sites.
Answers
Restriction enzymes are proteins that have the ability to cut DNA at specific sites. The correct answer is option (C)
They are primarily found in bacteria and are used as a defense mechanism against foreign DNA, such as viral DNA. These enzymes recognize specific DNA sequences, known as recognition sites or restriction sites, and cleave the DNA at or near these sites.
The cleavage of DNA by restriction enzymes is important in various molecular biology techniques, such as DNA cloning and genetic engineering. By cutting DNA at specific sites, restriction enzymes allow scientists to manipulate and study DNA in the laboratory. This includes inserting genes into plasmids, generating DNA fragments for analysis, and creating recombinant DNA molecules.
It is important to note that restriction enzymes do not stop transcription and translation, facilitate nucleotide base pairing, or bind together strands of DNA. Their primary function is to cleave DNA at specific sites, providing a powerful tool for genetic manipulation and research.
In summary, restriction enzymes are proteins that cut DNA at specific sites. They play a crucial role in genetic engineering and molecular biology techniques, allowing scientists to manipulate DNA and study gene function.
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Body of factual knowledge that exists around the world, and the method of study used to arrive at that knowledge
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The body of factual knowledge is diverse and includes scientific, historical, cultural, and other fields of knowledge.
The body of factual knowledge comprises scientific knowledge, which is based on empirical evidence, experimentation, and observation, as well as historical knowledge, which is based on studying past events, documents, and artifacts. It also includes cultural knowledge, which encompasses the customs, traditions, and beliefs of different societies, as well as other fields of knowledge such as mathematics, philosophy, and the arts.
The study of factual knowledge involves various methods, such as scientific method, historical research, ethnography, and statistical analysis, among others. These methods are used to investigate and analyze data and evidence, to identify patterns, relationships, and trends, and to arrive at conclusions and theories.
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luid is filtered from blood as it enters a capillary due to the _____, but fluid is reabsorbed as the blood exits a capillary due to the _____.
answer choices
hydrostatic pressure from smooth muscle; cooler temperatures in venous blood
osmotic pressure from high levels of sodium in plasma but not extracellular fluid; osmotic pressure from reversed levels of sodium in extracellular fluid but not plasma
blood pressure from the heart; osmotic pressure from proteins in the plasma
osmotic pressure from salts; hydrostatic pressure from the veins
Answers
Fluid is filtered from blood as it enters a capillary due to the (C) hydrostatic pressure from the heart, but fluid is reabsorbed as the blood exits a capillary due to the osmotic pressure from proteins in the plasma.
What are capillaries?
Capillaries are small blood arteries found throughout your body. They deliver blood, nutrients, and oxygen to cells throughout your organs and bodily systems. Capillaries are your vascular system's smallest blood vessels.
What are capillaries made up of?
Capillaries are composed of only the tunica intima, consisting of a thin wall of simple squamous endothelial cells. They are the smallest blood vessels in the body: they convey blood between the arterioles and venules.
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Select all cell types that typically contain a Barr body.A. Female gametesB. Male gametesC. male skin cellsD. Male blood cells
Answers
Female gametes typically contain a Barr body. Option A is correct.
A Barr body is an inactive, condensed X chromosome that forms in the nuclei of female mammals. It is created as a result of X chromosome inactivation during embryonic development, where one of the two X chromosomes in each cell becomes inactivated to prevent gene overdosage. The inactive X chromosome is then compacted and becomes a Barr body, which can be observed under a microscope in female somatic cells.
Male gametes, male skin cells, and male blood cells typically do not contain a Barr body, as they only have one X chromosome and do not undergo X chromosome inactivation. However, in rare cases of Klinefelter syndrome, where a male has an extra X chromosome, a Barr body may be observed in some of their cells. Option A is correct.
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Which statement accurately describes dark matter? It is the same as dark energy. It is well understood by scientists. It does not emit electromagnetic radiation. It can be observed by shifts in red and blue light.
Answers
Answer:
Dark matter does not emit electromagnetic radiation.
Explanation:
Dark matter comparative to dark energy, has various differences. You could say that dark energy is put into action on a larger scale than dark matter, which is also why dark energy makes up 74 percent of the universe. Thus, dark matter ≠ dark energy.
Scientists have a lot to learn about dark matter, so we can't claim that this subject has been well understood about scientists. In fact, it is one of the least understood parts of the universe!
_______________________________________________________
Now dark matter can be defined as particles that do not absorb, reflect, or emit light. Thus, it can't be observed by electromagnetic radiation - nor shifts in red and blue light. At the same time it does not emit electromagnetic radiation.
Answer:
dark matter does not emit electromagnetic radiation.
Explanation:
Which joint is a good representation of amphiarthroses? The joint connecting:
your wrist to your fingers.
your tibia to your fibula (shinbone and lower leg bone).
your cranium to your spine.
your masticular (jaw) bone to your skull.
Answers
Answer:
I think the "your masticular (jaw) bone to your skull."
Explanation:
"Examples include the fibrous joints of the skull sutures and the cartilaginous epiphyseal plate. A joint that allows for limited movement is amphiarthrosis. An example is the pubic symphysis of the pelvis, the cartilaginous joint that strongly unites the right and left hip bones of the pelvis."
Put simply, an amphiarthroses joint is a joint with more limited movement.
your wrist to your fingers - very movable
your cranium to your spine. - pretty moveable
So that is why I think it is your masticular (jaw) bone to your skull! Hopefully this is correct and helps, have a nice day! :D
What do you think of the butterfly effect. Use at least one example in your answer.
Answers
Answer:
The butterfly effect is that small causes can have significant impacts, specifically in chaotic systems. One example of the butterfly effect is in weather forecasting. A small change in the initial conditions of a weather system, such as the flapping of a butterfly's wings, can lead to vastly different weather patterns down the line. This makes long-term weather forecasting difficult, as minor errors in initial conditions can significantly affect the outcome.
Explanation:
A person infected with HIV may not have any symptoms for a period of time. During this period the virus affects the body by doing which of the following?
Answers
Answer:
By some steps
Explanation:
*following irregular ingestion.
*Not taking more water etc.
Why does Mr. Brunner care for Percy so much?
Answers
The illustration shows Galápagos tortoises from Albemarle and Abingdon islands. The variations in the features of the tortoise populations on Albemarle and Abingdon islands are examples of __________.
A. adaptations
B. vestigial structures
C. analogous structures
D. molecular similarities
Answers
Answer:
A
Explanation:
6) What new thing have you been doing to stay stress-free and positive during the pandemic
Answers
Both prokaryotic cells and eukaryotic cells have genetic material in the form of DNA. True or false?
Answers
Answer: True
Explanation:
True. Both prokaryotic cells and eukaryotic cells have genetic material in the form of DNA.
What is DNA?DNA (Deoxyribonucleic Acid) is a molecule that carries genetic information in all living organisms. It is composed of long chains of nucleotides, which are the building blocks of DNA. Each nucleotide consists of a sugar molecule, a phosphate group, and a nitrogenous base. There are four types of nitrogenous bases in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T), and it is the specific sequence of these bases that determines the genetic information stored in DNA.
DNA controls the development, function, and replication of cells, and its information is passed from one generation to the next through the process of DNA replication. The study of DNA and its role in genetics is known as genomics, and advances in this field have led to a greater understanding of the genetic basis of diseases, evolution, and many other biological processes.
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Work attached. Its just a quick question.
Answers
Answer:
suspect 2 the dna matches
Explanation:
just does
Answer:
Im pretty sure 4.
Explanation:
Identify the feature of life that is illustrated by each of the following statements.
NOTE: You may use terms other than the characteristics of life!
1. ________ “That boy shot up five inches in only one year.”
2. _______________________ “Our cat had a litter of kittens yesterday.”
3. _______________________ “My dog has become much less clumsy now that he is a year old.”
4. _______________________ “Eat a good breakfast and you will be able to run longer.”
5. _______________________ “When that car pulled into the driveway, my cat ran to hide under the porch.”
6. __________________ “That owl’s night vision allows it to see the movement of
mice on even the darkest night.”
7. _______________________ “Single-celled organisms live in the pond behind school.”
8. _______________________ Your body normally maintains a temperature of 98.6°F.
9. _______________________ A giraffe uses its long neck to eat from the high branches of a tree.
10. _________ is another name for “living thing.”
Answers
The features or characteristics of living things in the statements are:
1. Growth
2. Reproduction
3. Movement
4. Nutrition
5. Movement
7. Habitat
8. Irritability
9. Adaptation
10. Organism
What are the characteristics of life?The characteristics of life are those characteristics living organisms possess.
The characteristics of life include:
MovementRespirationNutritionIrritabilityGrowthExcretionReproductionThese can be seen in the statements below:
1. Growth “That boy shot up five inches in only one year.”
2. Reproduction “Our cat had a litter of kittens yesterday.”
3. Movement “My dog has become much less clumsy now that he is a year old.”
4. Nutrition “Eat a good breakfast and you will be able to run longer.”
5. Movement “When that car pulled into the driveway, my cat ran to hide under the porch.”
6. Irritability “That owl’s night vision allows it to see the movement of
mice on even the darkest night.”
7. Habitat “Single-celled organisms live in the pond behind school.”
8. Irritability Your body normally maintains a temperature of 98.6°F.
9. Adaptation A giraffe uses its long neck to eat from the high branches of a tree.
10. Organism is another name for “living thing.”
In conclusion, the characteristics of living things are those things that living things possess that make them alive.
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porangia can be identified as part of the fossil rhynia because meiosis produces
Answers
Sporangia can be identified as part of the fossil Rhynia because meiosis produces haploid spores.
Sporangia are spore-producing structures that are found in the fossil record of Rhynia, a primitive vascular plant that lived in the Devonian period. Meiosis is a type of cell division that produces haploid cells, which are cells that have half the number of chromosomes as the parent cell.
Spores are haploid cells that can develop into new plants. The presence of sporangia in the fossil record of Rhynia is evidence that this plant reproduced by spores, which is a characteristic of vascular plants.
Haploid cells are produced by meiosis, which is a type of cell division that reduces the number of chromosomes in a cell by half. This process is necessary for sexual reproduction, as it allows for the mixing of genetic material from two parents. In the case of porangia, meiosis produces haploid spores that can then germinate and develop into new plants.
The presence of porangia in the fossil record of Rhynia is significant because it provides evidence that this plant reproduced by spores. This is important because it helps us to understand the evolution of vascular plants.
Vascular plants are the most complex type of plant, and they play an important role in the environment. By studying the fossil record, we can learn more about how vascular plants evolved and how they came to be so successful.
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How can you identify the difference between a chemical and physical change and what are signs that a chemical change had occurred?
Answers
Answer:
The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.
State one important precaution regarding the apparatus used in all food tests
Answers
Answer:
WEAR A LAB COAT TO PROTECT YOUR CLOTHES AGAINST THESE CHEMICALS, AND SAFETY GLASSES TO PROTECT EYES, UNLESS YOU ARE A SPECTACLE WEARER. (EXCEPT WET GLASSWARE, AND EMPTY CHEMICAL BOTTLES!). BE ESPECIALLY CAREFUL WITH HOT LIQUIDS AND WATERBATHS. KEEP CHEMICAL BOTTLES OFF THE BENCH, AND DO NOT CONTAMINATE PIPETTES
Explanation:
Cellular respiration is an exothermic reaction and photosynthesis is an endothermic reaction. How does the required activation energy compare for these two reactions?
Photosynthesis needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Cellular respiration needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Photosynthesis needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Cellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Answers
Answer:
I think it is either a or c
Explanation:
A Hydrogen Bond is a very strong bond between molecules
true
or
false
Answers
Answer:
True.
Explanation:
Hydrogen bonds are the strongest intermolecular forces.
Computer frequency of production of sperm and Human males to the frequency of production of eggs in human females
Answers
The frequency of production of sperm in human males is generally higher as compared to the frequency of production of eggs in human females.
What is the production of egg and sperm cells called?The production of both egg and sperm cells initiates as identical germ cells and is produced through a process of cell division called meiosis, which reduces the number of chromosomes in the germ cell from 46 (diploid) to 23 (haploid).
Inside the fallopian tube, sperms may take about two hours to swim the distance, during which most get exhausted and die. So, more sperm definitely means better chances of fertilization. Sperms surrounding the egg will release hydrolyzing enzymes to dissolve zona radiata and zona pellucida around the egg.
Therefore, The frequency of production of sperm in human males is definitely required in the mechanism of successful fertilization.
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in the absence of oxygen, fermentation must happen, otherwise glycolysis will stop. this is regardless of whether it is lactic acid fermentation or alcohol fermentation that is used. explain why nad is needed for glycolysis. g
Answers
In the absence of oxygen, glycolysis is the only way for cells to produce energy. However, glycolysis requires the presence of NAD+ to be able to continue producing ATP.
During glycolysis, glucose is converted into pyruvate and in the process, NAD+ is reduced to NADH. In order for glycolysis to continue, the NADH must be recycled back to NAD+. This is where fermentation comes in. Lactic acid fermentation and alcohol fermentation are two types of fermentation that recycle NADH back to NAD+. In lactic acid fermentation, pyruvate is converted into lactic acid and in the process, NADH is oxidized to NAD+. In alcohol fermentation, pyruvate is converted into ethanol and in the process, NADH is also oxidized to NAD+. So, regardless of the type of fermentation, NAD+ is needed for glycolysis to continue producing energy in the absence of oxygen.
Glycolysis is the first step in cellular respiration, where glucose is broken down into pyruvate, yielding a small amount of ATP. NAD (Nicotinamide adenine dinucleotide) is an essential coenzyme in glycolysis as it acts as an electron carrier. During glycolysis, NAD+ accepts electrons and is reduced to NADH, which allows the continuation of the glycolytic pathway and production of ATP.
In the absence of oxygen, fermentation occurs to regenerate NAD+ from NADH, ensuring that glycolysis can continue. Both lactic acid fermentation and alcohol fermentation serve this purpose by oxidizing NADH back to NAD+, albeit with different end products. This process is crucial because, without NAD+, glycolysis would stop, and the cell would not produce enough ATP to meet its energy requirements.
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balance the equation by filling in the chefficients
Answers
To balance the combustion equation of ethane (C2H6 + O2 → CO2 + H2O), we need to assign coefficients to each compound. The balanced equation is 2C2H6 + 7O2 → 4CO2 + 6H2O.
To balance the combustion equation of ethane (C2H6 + O2 → CO2 + H2O), we need to ensure that the number of atoms on both sides of the equation is equal. Let's go through the process of balancing the equation step by step.
We start by balancing the carbon atoms. There are two carbon atoms on the left side (2C2H6) and one carbon atom on the right side (1CO2). To balance the carbons, we assign a coefficient of 2 in front of CO2, resulting in 2CO2.Next, we balance the hydrogen atoms. There are six hydrogen atoms on the left side (2C2H6) and six hydrogen atoms on the right side (6H2O). The hydrogen atoms are already balanced.Finally, we balance the oxygen atoms. There are two oxygen atoms on the left side (1O2) and four oxygen atoms on the right side (2CO2). To balance the oxygens, we assign a coefficient of 7 in front of O2, resulting in 7O2.The balanced equation is 2C2H6 + 7O2 → 4CO2 + 6H2O, where the number of atoms of each element is equal on both sides of the equation, satisfying the law of conservation of mass.
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Complete Question:
The following chemical equation shows the combustion of ethane. Balance the equation by filling in the coefficients.
C2H6 + O2 → CO2 + H2O
2. What social issues affected the problem or its solution in each of the stories?
for conservation in each stories
"Using forests wisely"
"Community conservation"
Answers
Answer:
Social issues such as poverty and to fulfill basic needs etc.
Explanation:
Social issues such as poverty, lack of awareness and to fulfill basic needs etc affected the problem or its solution in the stories i.e. "Using forests wisely" and "Community conservation" because these issues forced people to cut the forest and use the lands unwisely to fulfill their basic needs and betters their social status in the society. Due to poverty, people cut the trees in the forest and sold them to earn money in order to buy food and other necessary items for their family. If these social issues are solved, there is no need for cutting of trees and land use.
Review the following list of processes that can alter the genetic make up of a population. which one is considered by scientists to be primarily responsible for evolution?
A. Mutation
B. Genetic Drift
C. Immigration of new individuals in a population
D. Natural Selection *
Answers
Natural selection is one of the process responsible for evolution. The correct option is D
What is genetic?Genetics can be define as the branch of biology concerned with the study of the DNA of organism and how those genes are inherited by offspring. Genes are passed to offspring in both sexual and asexual reproduction and over time natural selection can accumulate variations amongst individuals on the group level.
Therefore natural selection is one of the process responsible for evolution and it's the central of mechanism.
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Joseph has hypothesized that sound travels in waves. If he were following the scientific method, what should he do next?
A.
Study the results.
B.
Ask a question.
C.
Tell other scientists about his hypothesis.
D.
Test the hypothesis.
Answers
