When swallowing a bite of food, the ______ closes over the trachea to allow the bolus to enter the esophagus.
Answers
When swallowing a bite of food, the epiglottis closes over the trachea to allow the bolus to enter the esophagus.
What is the function of epiglottis?
The epiglottis is a cartilage flap found in the throat, in front of the larynx, and behind the tongue. When at repose, the epiglottis is typically upright, allowing air to enter the larynx and lungs.
In order to prevent food and fluids from entering the windpipe and lungs, the epiglottis folds backward when a person swallows. The epiglottis resumes its erect posture after swallowing.
A potentially fatal illness known as epiglottitis develops when the epiglottis, a little cartilage "lid" that covers your windpipe, expands and obstructs airflow to your lungs.
The epiglottis may expand due to a variety of conditions, including infections, direct injuries to the throat, and burns from hot liquids.
Therefore, the epiglottis closes the trachea to prevent the entry of food into it.
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Related Questions
In eukaryotic cells, DNA is packaged with proteins into structures called
chromosomes. What advantage do chromosomes provide the cell?
a. They ensure equal division of genetic material when a cell divides.
b. They allow random distribution of genetic material when a cell divides.
c. They allow all genes to be expressed at the same time.
d. They eliminate the need for a nuclear membrane.
Answers
Answer:
A
Explanation:
Two conditions that aquatic environments provide for the formation of fossils
Answers
Aquatic environments can provide two conditions for the formation of fossils: sedimentation and anoxic conditions.
Sedimentation is the process of layers of sedimentary rock building up over time and preserving the remains of dead organisms within the layers. In aquatic environments, sediments can accumulate quickly, burying organisms before they have a chance to decompose or be scavenged by other animals. sedimentation is important because it helps to preserve organic material from being decomposed or destroyed by scavengers. In aquatic environments, sedimentation occurs as sediment settles to the bottom of the body of water, where it covers the remains of plants and animals and protects them from exposure to the elements. Over time, the sediment hardens and forms sedimentary rock, which can preserve fossils for millions of years.
Anoxic conditions refer to the lack of oxygen in the environment, which can slow down or prevent the decomposition of organic matter. In some aquatic environments, such as deep ocean basins or stagnant ponds, the water can become depleted of oxygen, creating an environment where dead organisms are preserved instead of decomposed. This can lead to the formation of well-preserved fossils that provide valuable information about ancient life forms and their environments.
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5. A molecule whose ends have opposite electric charges is called a ____ molicule
Answers
A molecule that contains atoms with different charges is called a polar molecules because one pole is positive and the other is negative.
The primary factors which determine each biome are: (Multiple choice)
A. Land features.
B. Plate tectonics.
C. Sunshine.
D. Rainfall.
E. Temperature.
Answers
Answer:
The primary factor which determines a biome is the climate. Temperature and precipitation essentially determines what kind of growing season or soil quality the terrain may have,which therefore affects the growth of plants living there.
The primary factor which determines a biome is the climate. Temperature and precipitation essentially determines what kind of growing season or soil quality the terrain may have,which therefore affects the growth of plants living there.
What is Temperature?The degree to which an object is hot or cold is measured by its temperature.
Temperature is what we refer to when we talk about how something feels warm or cold (like the snow, particularly if you're not wearing gloves).
We can determine how much heat or energy an object contains by measuring its temperature, which is typically expressed in degrees Fahrenheit or degrees Celsius. The heat we feel on our hands and faces is produced by highly active molecules in a boiling cup of water that are moving very quickly throughout the liquid.
Therefore, The primary factor which determines a biome is the climate. Temperature and precipitation essentially determines what kind of growing season or soil quality the terrain may have,which therefore affects the growth of plants living there.
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12. What significant event took place when Watson brought Linus Pauling's
manuscript to Kings College on an unannounced visit?
Answers
Watson observed the picture that Rosalind Franklin had taken without her knowledge. This photograph (photo 51) revealed key information on the DNA´s three-dimensional (3D) structure.
The British crystallographer Rosalind Franklin took a photograph (now universally known as Photo 51), which was fundamental for the DNA´s three-dimensional (3D) double helix structure of the DNA molecule.
Photo 51 is a diffraction image that displayed the manner a beam of X-rays scattered off a fiber of DNA.
Rosalind Franklin's original manuscript and her photo 51 are in the Linus Pauling Papers.
Photo 51 was used by Watson and Crick to decipher the double helix structure of the DNA molecule, which was published in 1953 in the journal Nature.
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How does DNA Polymerase/RNA Polymerase know what nucleotides to polymerize during DNA replication/transcription?
Answers
DNA polymerase and RNA polymerase are enzymes responsible for polymerizing nucleotides during DNA replication and transcription, respectively. Both enzymes use a template strand of DNA to synthesize a complementary strand of RNA or DNA, respectively.
What does the sequence of template provide ?The sequence of the template strand of DNA provides the information needed for DNA or RNA polymerase to know what nucleotides to polymerize.
DNA polymerase reads the sequence of the template strand of DNA and selects the corresponding nucleotide to add to the growing complementary strand. Similarly, RNA polymerase reads the sequence of the template strand of DNA and selects the corresponding ribonucleotide to add to the growing RNA strand.
The nucleotides are selected based on the base-pairing rules, which dictate that adenine (A) pairs with thymine (T) in DNA, and with uracil (U) in RNA, and that cytosine (C) pairs with guanine (G).
Therefore, By following these rules, the enzymes ensure that the new DNA or RNA strand is complementary to the template strand and that the genetic information is faithfully transmitted from one generation to the next.
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plz help i will give u BRAINLIEST
Answers
Answer:
(D.) I think
I hope I am correct.
Identify the structures labeled in the diagram.
Label A
Golgi apparatus
mitochondrion
nucleus
DONE
Answers
Answer:
C
Explanation
Got it right on edge
Answer:
label A: nucleus label B: ribosomes
Explanation:
trust me.
Which of the following shows the evolutionary relationships between organisms?
Branching tree
Binomial nomenclature
Three-domain classification
Taxonomic key
Answers
Answer:
Answer is A.
Explanation:
I hope it's helpful!
Answer: A
Explanation: 100% :)
write a narrative where the main character is a carbon atom; your story will follow the carbon atom from when its produced, is transformed in photosynthesis and then transformed again in cellular respiration. the "moral" of the story should be how the three cycles interact.
Answers
Cellular respiration is changed into photosynthesis and back again. The "moral" of the story should be how the three cycles interact.
Where is carbon found?Excluding a little amount that really is present inside the sea, sky, and life forms, most of the carbon on the planet is trapped in rocks and sediments. These act as sinks or reservoirs for the carbon cycles.
How may carbon be used?Fuels made from coal, methane gas, and crude oil are all used (which is used to make gasoline). Many different goods, including as plastic and steel alloys, are produced using it (a combination of carbon and iron). It can even be used to create black ink for printing and painting.
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Use the image to answer the questions.
B
с
is a producer
is a consumer.
Answers
C is a consumer
A is the consumer
Daniel expanded the expression as shown. Negative 2 (Negative 8 x minus 4 y + three-fourths) = negative 10 x minus 8 y minus 1 and one-fourth What errors did he make? Select three options. The first term should be positive. The second term should be positive. The last term should be Negative 1 and one-half, not Negative 1 and one-fourth. He divided Negative 8 by Negative 2 instead of multiplying Negative 8 by Negative 2. He did not simplify the expression completely.
Answers
Answer:
1st option, 2nd option, and third option.
Explanation:
Did this problem and got it right with these answers! :)
Answer:
a, b, and c
Explanation:
it really surprised me. trust me I'm not lying. I promise
this specimen showed an expected representation of chromosome 21, 18 and 13 material. clinical correlation is suggested.
Answers
When a chromosome has trisomy 21, 18, or 13, it has three copies rather than two. Chromosome 21 has an additional copy in people with Down syndrome.
What is the main function of a chromosome?
Chromosomes allow DNA to be accurately copied throughout these cell divisions. I'll say it again. The chromosomes found in the nucleus of our cells allow for exact DNA duplication during cell division. This ensures that our internal procedures are efficient and successful.
Why is chromosome named that?
Chromosomes are the DNA units that transmit inherited traits from one generation to the following. Because they transmit hereditary traits to the DNA of the following generation, they are referred to as the seat of hereditary information.
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1. Refer to the data in Model 1.
Flow many males are taller than 175 cm and approximately what percentage is
that?
Answers
Answer:
11 males, 25%
Explanation:
Eleven of the 44 males in this study are taller than 175 centimetres, which makes it one fourth of the total that is 25%. See below:
simplify the fraction \(\frac{11}{44}\)
= \(\frac{1}{4}\) now multiply it by 100 to convert to a percentage value.
= 25%
Answer:
The correct answer is 10 and this is 50%
Explanation:
Which of these are long strands of DNA?
A. Chromosomes
B. Fossils
C. Genes
D. Mutations
Answers
Answer:
Chromosomes
Explanation:
They are the long strands of DNA
PLZ HELP ME
If a genetic mutation in a plant that produces flowers results in a lack of petals on the flowers, what do you predict would be the most likely consequence to the plant?
It would produce seeds, but the ovary surrounding the seeds would not be able to grow and form a fleshy fruit.
It would reproduce asexually instead of sexually since not all of its necessary reproductive structures would be present.
It would grow taller than other plants, because less energy would be needed to produce flowers and could instead be used for growth.
It would have less reproductive success since it would attract fewer pollinators than plants that produce flowers with petals.
Answers
Answer:
Though petals are the important part of a plant but if there are no petals on a flower, the flower will not die. It generally attracts the pollinators such as bees and other insects.
jacob looked up and saw the car. this information was relayed to him via what type of tissue?
Answers
Based on the given information, it can be concluded that Jacob's eyes, which are part of the nervous tissue, allowed him to perceive the car visually. Therefore, the tissue responsible for relaying this information to Jacob is the nervous tissue.
Jacob looked up and saw the car. This information was relayed to him via nervous tissue.
Nervous tissue is responsible for transmitting and processing information through specialized cells called neurons, which communicate with each other through electrical and chemical signals.
In this case, Jacob's sensory neurons in his eyes detected the car and sent the information to his brain for processing, allowing him to recognize and react to the car.
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1. Explain what a "derived character" is in your own words.
Answers
Answer:
It is a trait or characteristics of yours most recent ancestor or a lineage of organisms that has evolved after separating from another lineages.
Each of the body systems:
a) depends on the others to function
b) performs a single task
c) is interchangeable
d) is controlled by the lungs
Answers
Answer:
a) depends on the others to function
Explanation:
The body systems work together to maintain homeostasis and keep the body functioning properly. Each system has specific functions, but they all rely on each other to function properly. For example, the respiratory system is responsible for bringing oxygen to the body, but it depends on the circulatory system to transport the oxygen to the cells. Similarly, the digestive system breaks down food and absorbs nutrients, but it depends on the circulatory system to transport those nutrients to the cells. Therefore, it is not accurate to say that each body system performs a single task or is interchangeable. Additionally, the lungs are a part of the respiratory system, but they do not control all of the body systems.
Do you think it is ethical and moral to genetically modify embryos using CRISPR? Why or why not?
Answers
Answer:
It is not ethical or moral to genetically modify embryos using CRISPR.
Explanation:
Genetically improving children puts them in a unique position of privilege. It's one thing to be born smarter than other people, it's another thing to have it paid for. In comparison, following the recent college scandal, it is unethical to pay for a position at a college rather than earn it.
1.6. Outline how can discussion, projects, campaigns and events support victims of drugs abuse?
Answers
Discussion, projects, campaigns and events can support victims of drugs abuse by making them aware of the effect and also as a n avenue for them to share their issues so as to gain support from people.
What is Drug abuse?This involves the excessive use of drugs which results in creating pleasurable effects on the brain. This usually leads to addiction and destroys vital cells of the body such as that of the liver, lungs etc.
Discussion, projects, campaigns and events can support victims of drug abuse due to the awareness it creates so that people can stay away from it in any form.
The affected individuals are usually offered support such as referring them to rehabilitation centers when their issues are said to the members of the team so as to ensure that they are able to recover fully from it without relapse.
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14. Scientist wanted to know if temperature effected the movement of
blackworms. What is the dependent variable?
-Temperature
-Movement
-Amount of Blackworms
-Scientists
Answers
Answer:
movement
Explanation:
the movement depends on the temp.
Answer:
movement
Explanation:
i hope its helps u
A mother who has type A blood and father with type B blood have a child with type blood. They believe that the hospital has made a mistake and given them the wrong baby.
Answers
Answer:
So
Explanation:
What is the question here
4. Sunlight, water, and carbon dioxide are environmental factors that affect the rate of photosynthesis?
What would happen to the rate of photosynthesis if producers did not get enough of one or more of these
factors?
Answers
Answer:1.Yes plants take in carbon dioxide for "air" they need water to keep hydrated sunlight helps it make food.
2.Then the entire process of photosynthesis would crash. If no carbon dioxide the plant would not be able to breath and die, No water and it dies of thrist and no sunlight and the plant shivers and dies.
For viruses with small genomes, mutations that accumulate within genes during replication in their host would likely result in what changes to the viral genome of the species?Choose one:A. Antigenic shiftB. A shift to a less diverse genome within the viral populationC. Increased stability within the genomeD. Antigenic drift
Answers
Mutations accumulating within genes during replication in viruses with small genomes would likely result in: D. Antigenic drift
For viruses with small genomes, mutations that accumulate within genes during replication in their host would likely result in antigenic drift, which is a gradual accumulation of point mutations and small genetic changes in the viral genome over time.
This can lead to changes in the viral proteins, which can affect their ability to be recognized by the immune system and lead to the development of new strains or subtypes of the virus.
Antigenic drift is a common mechanism of viral evolution in influenza viruses, for example, and can result in the emergence of new seasonal strains each year.
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What is the name of each labeled part?
Answers
Answer:B
Explanation: i did the quiz and got it right hope this helps =)
Answer:
A is Dentrite
B is Soma ( cell body )
C is terminal button
D is
The endangered Cheat Mt. Three-Tooth Snail occurs in sandstone outcrops along the Cheat Canyon in West Virginia. You need to estimate their abundance in a 100 hectare area of the forest. Describe how you would estimate their abundance in Cheat Canyon using area-based counts.
Answers
The accuracy of the estimate depends on the representativeness of the selected quadrats and the thoroughness of the surveys conducted. Adjustments may be needed based on the specific characteristics of the Cheat Mt. Three-Tooth Snail and the Cheat Canyon environment.
To estimate the abundance of the endangered Cheat Mt. Three-Tooth Snail in a 100-hectare area of the Cheat Canyon using area-based counts, you can follow these steps:
1. Determine the sampling method: Choose a suitable sampling method to estimate the snail abundance in the forest area. One common method is the quadrat sampling technique.
2. Divide the area into quadrats: Divide the 100-hectare area into smaller, equal-sized quadrats. The size of the quadrats will depend on the snail's distribution and the level of precision desired. For example, you can divide the area into 100 quadrats of 1 hectare each.
3. Randomly select quadrats: Randomly select a predetermined number of quadrats to survey. This helps ensure that the sampled quadrats are representative of the entire area. For instance, you might choose to survey 20 out of the 100 quadrats.
4. Conduct field surveys: Visit each selected quadrat and thoroughly search for the Cheat Mt. Three-Tooth Snails. Carefully examine the sandstone outcrops and record the number of snails found in each quadrat. Repeat this process for all selected quadrats.
5. Calculate snail density: Calculate the snail density by dividing the total number of snails observed in the sampled quadrats by the total area surveyed. For example, if you found 50 snails in the 20 sampled quadrats, the snail density would be 50 snails / 20 hectares = 2.5 snails per hectare.
6. Extrapolate to estimate total abundance: To estimate the snail abundance in the entire 100-hectare area, multiply the snail density by the total area. In this case, the estimated total abundance would be 2.5 snails per hectare * 100 hectares = 250 snails.
Remember, this is just one way to estimate the abundance using area-based counts. The accuracy of the estimate depends on the representativeness of the selected quadrats and the thoroughness of the surveys conducted. Adjustments may be needed based on the specific characteristics of the Cheat Mt. Three-Tooth Snail and the Cheat Canyon environment.
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Bradley decides one day to run a marathon without any training after 10 minutes is lapsed and Bradley has read half a mile he begins to get cramps in his dies he is also breathing very rapidly what is causing the cramps in Bradley‘s legs
Answers
Answer: The reason for the cramps in Bradley's legs are due to anaerobic respiration that has occured in the muscles and also the formation of lactic acid.
Explanation:
The reason for the cramps in Bradley's legs are due to anaerobic respiration that has occured in the muscles and also the formation of lactic acid. This could have been prevented if he had trained before running the marathon as thus will help in providing the muscles with strength.
We should note that in anaerobic respiration, glucose is being broken down without oxygen which is then passed on to the cells. Anaerobic respiration produces lactic acid.
According to the CDC, children whose blood has more than 5 micrograms of lead per deciliter have elevated blood-lead levels. What is that concentration in ppm? (Please assume that 1 deciliter of blood weighs 100 grams)
Answers
According to the CDC, children whose blood has more than 5 micrograms of lead per deciliter have elevated blood-lead levels. The concentration of lead in the child's blood is 0.05 ppm.
To convert this concentration to parts per million (ppm), we can use the following formula:
ppm = (mass of solute / mass of solution) × 106
In this case, the mass of solute is the amount of lead in micrograms (5 µg) and the mass of solution is the weight of 1 deciliter of blood in grams (100 g). Plugging these values into the formula, we get:
ppm = (5 µg / 100 g) × 106
ppm = (0.000005 g / 100 g) × 106
ppm = 0.05
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Refer to Animation: Sensing Gravity and Rotational Movements. Which of the following is a common feature of the lateral line of fish, and statocysts of crustaceans and mammals?
A. hair cells with stereocilia
B. statoliths
C. semicircular canals
D. synapses with motor neurons
Answers
A typical characteristic of the lateral line of fish, as well as the statocysts of crustaceans and humans, is the presence of hair cells with the following stereocilia. The correct option is A.
What are the stereocilia of hair cells?The auditory hair cells include tiny projections called stereocilia that participate in work together to identify by responding to fluid motion. Despite sharing the same name, stereocilia are distinct from cilia (structures based on the microtubule cytoskeleton) and have an actin cytoskeleton, much like microvilli.
What are stereocilia used for?For hearing and balance, auditory and olfactory sensory cells include protrusions made of actin called stereocilia. Mechanoelectrical transduction is the mechanism by which they transform the mechanical energy of sound, head movement, or gravity into such an electrical signal.
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