certain blood vessels are lined by layers of tissue that ensure the vessels can expand in contractexercise is one known factor that can improve the function of these layers. Which of thefollowing is regulated because certain blood vessels are able to expand and contract?a. the removal of foreign substances from bloodb. the shape and size of red and white blood cellsc. the flow of blood from the heart to body tissuesd. the exchange of gases between blood and the air
Answers
The diameter of blood vessels changes when they contract or expand. When the blood vessels constrict and have a smaller diameter, the blood will have less room to flow and therefore the blood pressure will increase. While if the vessels expand, the blood pressure will decrease.
Therefore, blood flow is directly affected by the constriction or expansion of blood vessels, hence, the answer is c.
Related Questions
two ways in which cows are being genetically modified to help humans.
Answers
Two ways in which cows are being genetically modified to help humans include higher cows and also it includes cows having a higher portion of protein in the tissues compared to fats or other tissues.
What is the purpose of genetically modified animals?The purpose of genetically modified animals is to include animals having desired features for humans such as a higher proportion of proteins, e.g., meat.
In conclusion, two ways in which cows are being genetically modified to help humans include higher cows and also it includes cows having a higher portion of protein in the tissues compared to fats or other tissues.
Learn more about the purpose of genetically modified animals here:
https://brainly.com/question/1118329
#SPJ1
Describe how the components of a meal containing fried fish and toast bread will be processed as they move through the digestive system of man
Answers
Answer:
Explanation:
When a meal containing fried fish and toast bread is consumed, it goes through a series of processes in the digestive system of a human. Here's a general description of how the components are processed:
1. Mouth: The process of digestion begins in the mouth. Chewing breaks down the toast bread and fish into smaller pieces, while saliva mixes with the food to start the breakdown of carbohydrates.
2. Esophagus: The chewed food, now called a bolus, is swallowed and travels down the esophagus through peristaltic contractions. The esophagus carries the food to the stomach.
3. Stomach: The stomach is responsible for further mechanical and chemical digestion. It mixes the food with stomach acid and digestive enzymes to break down proteins. The fried fish is broken down into smaller pieces through mechanical churning.
4. Small Intestine: The partially digested food leaves the stomach and enters the small intestine. Here, bile from the liver and enzymes from the pancreas break down fats, while other enzymes continue the breakdown of proteins and carbohydrates. Nutrient absorption occurs through the walls of the small intestine and is facilitated by small finger-like projections called villi.
5. Large Intestine: Any remaining undigested food, as well as water and electrolytes, pass into the large intestine. The large intestine absorbs water and electrolytes while forming waste material known as feces.
6. Rectum and Anus: The feces are stored in the rectum until elimination through the anus occurs during a bowel movement.
Throughout this process, various digestive enzymes and gastric juices are secreted at different stages to facilitate the breakdown and absorption of nutrients. The fried fish and toast bread are broken down into smaller molecules, such as proteins, carbohydrates, and fats, which are then absorbed into the bloodstream to provide energy and nourishment for the body.
I NEED HELP DUE IN 40 MINS! ONLY ONE QUESTION!
The fish species Astyanax mexicanus lives in caves deep underground off the coast of Mexico and cannot see.The fish has eyes, but as it develops in the egg, the eyes begin to degenerate, and the fish is born with an underdeveloped eye covered by a flap of skin.
1) The species A. mexicanus used to have functional eyes, but no longer has that ability. Why wasn't eyesight favored by natural selection.
Answers
Answer:
Due to its habitat being dark caves eyes became something they no longer needed, Eyesight was no longer favored by natural selection because it was a useless thing now in those deep dark caves.
Explanation:
at least I presume this is the answer to this question.
When is acetylcholine released into the synaptic cleft of a neuromuscular junction?
Answers
The release of acetylcholine occurs when an action potential is relayed and reaches the axon terminus in which depolarization causes voltage-gated calcium channels to open and conduct an influx of calcium, which will allow the vesicles containing acetylcholine for release into the synaptic cleft. ..
________________________________
\(\color{red}{\tt{Hope \ It \ Helps}} \)
You're working in the rainforest and discover a new species. You get to name the species. What must be included in this name, and how is it written?The name must include the genus and species of the new organism. It must be written in bold with the species name lowercase.The name must include the genus and species of the new organism. It must be written in italics with the species name lowercase.The name must include the domain and the species of the new organism. It must be written in italics with the species name lowercase.The name must include the genus and species of the new organism. It must be written in bold with the species and genus name in lowercase.
Answers
The correct option is: The name must include the genus and species of the new organism. It must be written in italics with the species name lowercase.
Species names have two parts, the genus, which could be shared by many species and the specific name, which is unique to each species. Species names are in italics, cause they are in a foreign language, latin. For example, Homo sapiens.
In a certain population ,the dominant phenotype of a certain trait occurs 90%?What is the frequency of the dominant allele?
Answers
Given that the dominant phenotype occurs in 90% of the population, we can say that p^2 + 2pq = 0.9 or 9/10.
We can then solve for p:
p^2 + 2pq = 0.9
p^2 + 2p(1-p) = 0.9
p^2 - 2p^2 + 2p = 0.9
-p^2 + 2p = -0.1
p^2 - 2p + 1 = 1.1
(p-1)^2 = 1.1
p-1 = ±sqrt(1.1)
p = 1 ± sqrt(1.1)
Since p is the frequency of the dominant allele, it cannot be greater than 1. Therefore, we take the negative root:
p = 1 - sqrt(1.1)
p = 0.05
So the frequency of the dominant allele is 0.05 or 5%.
there are desert areas in norway true or false
Answers
Answer:
l think that it's true that there are desert areas in Norway
Is it possible for you to find out whether a plant has taproot or fibrous roots by looking at
the impression of its leaf on a sheet of paper? Think and explain the answer.
Answers
Answer:
No, it is not possible to determine whether a plant has taproot or fibrous roots by looking at the impression of its leaf on a sheet of paper. This is because the root system of a plant is hidden underground and cannot be seen from the surface. The shape and size of a leaf can provide clues about the type of root system a plant has, but the impression of a leaf on a sheet of paper does not provide enough information to definitively identify the type of root system.
Explanation:
Which of the following groups of
animals could be found in the tundra?
A. bison, longhorns, burrowing animals, birds that nest
on the ground, and foxes
B. lions, rhinoceros, giraffes, and elephants
C. deer, fruit-eating birds, lizards, and snakes
D. migratory animals, oxen, caribou, and artic foxes
Answers
Answer: D (migratory animals, oxen, caribou, and arctic foxes)
Explanation: Migratory animals stay in the tundra during the "summer" months but leave during the colder and harsher months. The oxen and caribou have lower surface area to volume ratio which makes less heat able to dissipate into the surrounding area. They also have thick coats. In the summer fox are able to raise their young and prey on the birds and such that may migrate there.
The animals which live in the normal conditions live in this area. The correct statement is option D.
What is the most common animal in Tundra ?The most common animal in Tundra is the Arctic Fox.
Tundra wildlife usually contains the animals such as the The arctic foxes, migratory animals, oxen and caribou. There are harsh conditions in the winter thus the animals tend to elope from such areas in this case they are saved from the adverse effects of the weather and the climatic conditions.
The arctic fox is one of the most common animals that are found in the Tundra as the fox has thick skin with the property that it turns from brown to white in winter and the large body of them helps to preserve the heat that helps them to get saved from the adverse effects of temperature.
Learn more about Tundra forests at :
https://brainly.com/question/2596006
#SPJ2
I need the answer to it asap
Answers
Answer:
C: Excess fertilizer carried into rivers
Explanation:
Fertilizer used in agriculture is largely made up of nitrogen and phosphorus (and potassium). Runoff from regular landscaping practices and agricultural farming creates a buildup of these substances that is then carried to the Dead Zone by the Mississippi River.
Genotype: BBee
Phenotype:
DONE
V fur and
V eyes
Answers
\(black \: dominant = BB \\ phenotype = black \: fur \\ \\ red \: eyes \: recessive = ee \\ (not \: masked \: b y \: the \: dom \: trait) \\ phenotype = red \: eyes\)
Answer:
Explanation:
Genotype: BBee
Phenotype:
✔ black
fur and eyes
red
Which of the following is NOT an example of a biological model? (all answers choices 2nd slide)
Answers
Answer:
pictures of different ecosystems
Explanation:
i got it right
How are photosynthesis and cellular respiration related?
O A. Cellular respiration is the process animals use to produce glucose,
while photosynthesis is the process plants use to produce
glucose.
B. Cellular respiration provides the energy for photosynthesis.
OC. Photosynthesis produces water molecules, while cellular
respiration splits water molecules apart.
D. The products of photosynthesis are the reactants of cellular
respiration.
Answers
Answer:
D
Explanation:
can someone help me with this problem?
Answers
many crops that are grown like this are susceptible to diseases
Answers
Answer:
Explanation:
corn tomatoes cucumbers bananas etc.
A crane has a sharp and pointed beak while the duck has a flat beak.Explain why
Answers
Answer:
The crane has a sharp and pointed beak adapted for catching and grasping prey. The sharp beak allows the crane to effectively stab and pierce its prey, such as fish, frogs, or small animals. The pointed shape helps the crane to accurately target its prey and secure a firm grip.
On the other hand, the duck has a flat beak, which is better suited for its specific feeding habits. Ducks are primarily filter feeders, and their flat beak enables them to sift through water or mud to collect small organisms, insects, and plants. The flat beak acts like a sieve, allowing the duck to strain out food particles while retaining water.
The difference in beak shape between the crane and the duck reflects their distinct feeding strategies and ecological roles. Each species has evolved its beak shape to optimize its ability to capture and consume the specific types of food sources available in their respective habitats.
Forested floodplain wetlands benefit from periodic flooding from rivers. When floodwaters spill into the wetland, they bring water and nutrients and leave both behind. But humans have often cut off floodplains from rivers by building roads, levees, berms, etc. Think about what would happen if a river could no longer flood into these areas. How would the resulting increased amount of water and nutrients in the river affect soils, hydrology, and life downstream?
Answers
The absence of flooding from rivers into forested floodplain wetlands would lead to adverse effects on soils, hydrology, and the overall biodiversity downstream, emphasizing the importance of maintaining the natural connection between rivers and floodplains for the health and functioning of these ecosystems.
If a river can no longer flood into forested floodplain wetlands due to human interventions, it would have significant consequences for the downstream areas in terms of soils, hydrology, and life.Without periodic flooding, the increased amount of water and nutrients in the river would not be able to disperse and be deposited in the floodplain wetlands. As a result, downstream soils would experience a decrease in nutrient inputs, leading to decreased fertility and altered composition. The absence of regular flooding would disrupt the natural hydrological cycle, reducing the recharge of groundwater and altering the flow patterns in the river system. This could result in decreased water availability, increased erosion, and changes in the overall ecosystem dynamics downstream.The disruption of nutrient flows and hydrological patterns would also have a significant impact on the life forms downstream. Aquatic plants, fish, and other organisms that depend on floodplain wetlands for breeding, feeding, and shelter would face habitat loss and reduced food availability. This, in turn, could disrupt the food chain and impact the abundance and diversity of aquatic and terrestrial species in the downstream areas.The absence of flooding from rivers into forested floodplain wetlands would lead to adverse effects on soils, hydrology, and the overall biodiversity downstream, emphasizing the importance of maintaining the natural connection between rivers and floodplains for the health and functioning of these ecosystems.For more such questions on flooding
https://brainly.com/question/31808166
#SPJ8
MARKING PEOPLE AS BRAIN-LIST :)
5. Herbivores are also called ________.
Answers
Answer:
Herbivores are also known as primary consumers.
Explanation:
Hope this helped <3
possible reasons for differences in enzyme activity
Answers
There can be several reasons for differences in enzyme activity, including temperature, pH, enzyme concentration, substrate concentration, and the presence of inhibitors or activators.
Enzymes are biological catalysts that accelerate chemical reactions in the body. The rate of enzyme activity can be affected by various factors, such as temperature and pH. Each enzyme has an optimal temperature and pH range at which it functions best. Deviations from this range can cause the enzyme to denature or lose its shape, leading to a decrease in activity.
Changes in enzyme concentration can also affect activity. An increase in enzyme concentration generally leads to an increase in activity, while a decrease in concentration leads to a decrease in activity. The rate of enzyme activity can also be affected by substrate concentration.
To know more about enzyme activity, click here.
https://brainly.com/question/13825485
#SPJ1
Put the steps of our solar system's formation in the order scientists think they happened. 1₁ A cloud of gases and dust collapsed and formed a swirling disk as gravity pulled the matter together. Gravity pulled most of the mass in the disk of gas and dust to the center as the Sun formed. ++ Planets formed regular orbits around the Sun because of gravity and inertia, Planets formed as materials in the swirling disk stuck together and were held together by gravity.
Answers
solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust.
How was solar system's formed step by step?The Sun and the planets formed together, 4.6 billion years ago.from a cloud of gas and dust called the solar nebula.A shock wave from a nearby supernova explosion probably initiated the collapse of the solar nebula.The Sun formed in the center, and the planets formed in a thin disk orbiting around it.The planets, in order of their distance outward from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Four planets—Jupiter through Neptune—have ring systems, and all but Mercury and Venus have one or more moons.Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material.To learn more about solar system refers to;
https://brainly.com/question/17747351
#SPJ1
select all that apply. Which organisms are in competition for mangrove tree crabs?
a.) snook (fish)
b.) alligator
c.) ghost shrimp
d.)cuckoo(bird)
Answers
Organisms in competition for the mangrove tree crabs in a mangrove ecosystem;
alligatorcuckoo(bird)What is the mangrove?The mangrove is a swampy area that is filled with a lot of shrubs and is home to a large number of organisms. The feeding relationships in the mangrove also involve predator and prey relationships just as you have in other ecosystems.
The ecosystem is a self supporting system in which there is an exchange of materials and energy. We know that predation is a situation in which one organism feeds on another. This is an intricate part of the food chain in every ecosystem. The mangrove ecosystem is filed with a lot of these myriads of predator prey relationship in the ecosystem.
The following are the animals that are in competition for the mangrove tree crabs in a mangrove ecosystem;
alligatorcuckoo(bird)Learn more about mangrove:https://brainly.com/question/2666317
#SPJ1
Which term describes an enzyme?
substrate
reactant
catalyst
product
Answers
The enzyme helps to increase the rate of a reaction and hence is referred to as a catalyst. So option C is correct.
Enzymes aid in accelerating chemical reactions in the body. They play a vital role in respiration, metabolism, muscle, and nervous system function, as well as thousands of other functions. There are thousands of enzymes in every cell in the body. Enzymes aid in facilitating chemical reactions in every cell.
Biocatalysts are enzymes that accelerate biochemical reactions in living cells. They act as catalysts, reducing the activation energy and accelerating the reaction.
To learn more about the enzyme, refer to the link:
https://brainly.com/question/14953274
#SPJ7
Drag the tiles to the correct boxes to complete the pairs. Match the type of evidence for evolution to the correct example. Analogous structures, DNA Sequence, Vesitgal structures, homologous strutcures
Answers
Analogous structures include wings in birds and insects homo-logous structures are DNA sequences due to a common origin, and a vestigial structure can be the human appendix.
What are analogous structures?Analogous structures are traits that have the same function but they originated in different lineages.
Conversely, homo-logous structures have the same common origin but they may play different functions.
In conclusion, wings in different taxonomic groups may represent analogous structures, DNA sequences are homo-logous structures when they have the same ansestor and the human appendix is a vestigial structure.
Learn more about analogous structures here:
https://brainly.com/question/11154123
#SPJ1
The diagram below shows part of the rock cycle.
Rock cycle with a volcanic eruption at the top. Moving counterclockwise, there is an arrow pointing to Rock B. From Rock B there is an arrow labeled sediment and compaction pointing to Rock C. From Rock C there is an arrow labeled heat and pressure pointing to Rock A. From Rock A there is an arrow labeled magma pointing back to volcanic eruption.
Which type of rock does B represent?
Igneous rock
Metamorphic rock
Rock formed by compaction
Rock formed by heat and pressure
Answers
The rock cycle involves material turning from magma to igneous rocks, from igenous to magma, sedimentary and metamorphic rocks, from sedimentary to metamorphic rocks and magma, and from metamorphic rocks to sedimentary rocks and magma. In the exposed cycle, B is an igneous rock.
What is the rock cycle?
The rock cycle, also known as the lithological cycle, is the geological process through which rocks transform.
During the cycle, rocks suffer transformations that lead them to change from one type to another, turning into igneous, sedimentary, and metamorphic rocks.
The cycle begins when magma rises to the Earth's surface, where it gets cold, solidifies, and turns into igneous rocks.
Igneous rocks can suffer three types of transformations,
If they remain on the Erth's surface, they can suffer erosion, breaking, and producing small rocky fragments that deposit as sediment. Eventually, these sediments gather and compact, turning into sedimentary rocks.If they get buried under several layers on the ground, they can suffer a change of temperature and pressure, turning into metamorphic rocks. If they get even deeper under the crust, they can melt and become magma again.Sedimentary rocks are composed of rocky sediments from other rocks and the remains of living beings that get stuck within the sedimentary layers.
Sedimentary rocks can suffer the same three types of transformations,
If they remain on the surface, they suffer erosion and produce new sediment.If they get buried, they turn into metamorphic rocks due to changes in temperature and pressure.If they are transported under the crust, they can melt and become magma.Finally, metamorphic rocks are produced underground when other rocks suffer changes.
Metamorphic rocks have two destinies,
If they remain on the surface, they suffer erosion and produce new sediment, turning into sedimentary rocks.If they are transported under the crust, they can melt and become magma.According to this cycle,
B represents an igneous rock. C represents an sedimentary rock.A represents a metamorphic rock.You can learn more about the rock cycle at
https://brainly.com/question/15619429
#SPJ1
Answer: Metamorphic rock
Explanation:
What is a example of structural diversity
Answers
Answer:
Structural diversity refers to the variety of physical structures or habitat types within an ecosystem. It can be observed in a variety of natural settings, such as forests, grasslands, or coral reefs.
An example of structural diversity in a forest ecosystem would be the presence of different tree species with varying heights, crown shapes, and ages. This creates a diverse vertical structure, with some trees reaching high into the canopy layer while others grow lower in the understory. The presence of snags (dead trees), downed logs, and fallen branches on the forest floor also contributes to structural diversity, providing habitat for a variety of wildlife species such as insects, fungi, and small mammals. These different structural components support a range of ecological processes, such as nutrient cycling, decomposition, and predator-prey relationships, which contribute to the overall health and resilience of the forest ecosystem.
Hope it helps! : )The products of photosynthesis serve as substrates for aerobic respiration, while those of aerobic respiration are utilised in photosynthesis. Considering the substrates and products of these two biological processes, discuss how they feed into one another.
Answers
Photosynthesis and aerobic respiration are two essential biological processes that are intimately connected, as they provide the basis for energy flow in most living organisms. Photosynthesis is the process by which plants and some other organisms convert light energy into chemical energy in the form of organic molecules, while aerobic respiration is the process by which cells break down organic molecules to release energy in the form of ATP (adenosine triphosphate).
The products of photosynthesis, which are organic molecules such as glucose and other sugars, serve as substrates for aerobic respiration. During aerobic respiration, these organic molecules are broken down by a series of enzymatic reactions, releasing energy that is used to generate ATP. This energy is used by the cell to carry out various metabolic processes and perform work.
On the other hand, the products of aerobic respiration, which are carbon dioxide (CO2) and water (H2O), are utilized in photosynthesis. During photosynthesis, plants and other organisms take in CO2 from the atmosphere and use it, along with water and light energy, to produce organic molecules such as glucose. This process is facilitated by a group of pigments called chlorophyll, which are located in the chloroplasts of plant cells.
Therefore, the substrates and products of photosynthesis and aerobic respiration feed into one another, creating a continuous cycle of energy flow. The organic molecules produced during photosynthesis provide the energy necessary for cells to carry out aerobic respiration, while the products of aerobic respiration are used in photosynthesis to produce more organic molecules. This cycle helps to ensure that the energy needs of living organisms are continuously met and that the environment remains in balance.
Learn more about Photosynthesis:
https://brainly.com/question/19160081
#SPJ11
What is the missing word? During exercise, the breathing rate increases to supply more __________ to the body.
Answers
Answer:oxygen
Explanation:
Bacteria, like most forms of life use ___ to reduce the activation energy of metabolic reactions.
select all correct answers
Bacteria, like most forms of life use ___ to reduce the activation energy of metabolic reactions.
select all correct answers
catalysts
resonance structures
entropy
photons
enzymes
Answers
Answer:
Catalysts, enzymes
Explanation:
Catalysts are known for reducing the activation energy of a reaction thus increasing the reaction rate.
Enzymes are a type of catalyst.
the breakdown of large, complex, molecules into smaller, simpler molecules is accomplished by a process known as? A. Dehydration Synthesis B. Induced Fit C. Hydrolysis D. Lock and Key Synthesis
Answers
Answer: C. Hydrolysis
Explanation:
In the process of hydrolysis, large complex molecules such as polymers are broken down into smaller, simpler molecules like monomers.
This is done through the use of water. The molecule that neds to be broken down is reacted with water and water then breaks the bonds of the complex molecule. The hydrogen ion in water goes to a molecule of the other reactant and the OH- goes to another molecule.
How many neutrons does hydrogen-1 have? How many neutrons does hydrogen-2 have?
Answers
Answer:
One Neutron
Explanation:
All three forms have one proton (pink) and one electron (dark green) but differ in the number of neutrons (gray) in the nucleus. Protium, or ordinary hydrogen (top), has no neutrons. Deuterium, or hydrogen-2 (bottom left) has one neutron. Tritium, or hydrogen-3 (bottom right) has two neutrons.