b. Capillaries are vessels through which nutrient and gas exchange take place.
Capillaries are the smallest blood vessels in the body and are responsible for facilitating the exchange of nutrients, gases, and waste products between the bloodstream and surrounding tissues. They connect the arterioles (small branches of arteries) and venules (small branches of veins).
Capillaries have thin and permeable walls, consisting of a single layer of endothelial cells. This structure allows for the exchange of substances between the blood and surrounding tissues. Oxygen and nutrients diffuse out of the capillaries into the tissues, while carbon dioxide and waste products from cellular metabolism diffuse into the capillaries to be carried away.
The extensive network of capillaries ensures that every cell in the body is located in close proximity to a capillary, allowing for efficient exchange of substances. This exchange includes the delivery of oxygen and nutrients to the cells, as well as the removal of carbon dioxide and waste products.
While blood cells, such as red blood cells and white blood cells, are present in the capillaries, they are not the defining characteristic of capillaries. Instead, capillaries are primarily associated with facilitating the exchange of substances between the bloodstream and the surrounding tissues.
Therefore, option b is the correct answer as it accurately describes the role of capillaries in facilitating nutrient and gas exchange.
To learn more about capillaries, here
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Why is it a good idea for humans to create models of how populations are changing?
What do models help us do?
1. What is the goal of mitosis?
How does embryology support evolution?
Which of the following pairs is unrelated?
O Sugar-carbohydrate
O Fat-lipid
O Amino acid-protein
O Starch-nucleic acid
How is carbon dioxide affecting climate changes? Is there any evidence showing that humans can work on changing the Carbon Dioxide Levels? Can humans control them?
plsss need help!!
ASAP!!!!!!
Answer:
1.) Carbon Dioxide is being used as a greenhouse, preventing the heat from turning into thermal radiation into space.
does coal, solar energy, hydroelectric power, or wind power take the most power
Answer:
wind power
Explanation:
on average onshore winter buying with a capability of 2.5 - 3 MW can produce more than 6 million kwh in a year minus enough to supply 1500 average EU household with electricity.
Hemoglobin is a molecule in vertebrates that carries oxygen through blood from the lungs to other parts of the
body.
Based on its function, hemoglobin is an example of which type of macromolecule, and why?
А. It is a lipid because some lipids travel through blood.
B. It is a lipid because some lipids form the membranes of lung cells.
C. It is a protein because some proteins are responsible for transporting substances.
D. It is a protein because some proteins are responsible for regulating an organism's activities.
What is the function of spindle fibers during cell division?
Why are differences and similarities in DNA and proteins evidence of evolution?
Answer:
Homologous structures provide evidence for common ancestry analogous structures show that similar selective pressures can produce similar adaptations beneficial features Similarities and differences among biological molecules in the DNA sequence of genes can be used to determine species relatedness
The _____________ is a gel-like fluid that fills plant and animal cells. It holds the organelles in place and gives each cell its shape. * 1 point
Answer:
cytoplasm
Explanation:
The cytoplasm's job is to hold organelles in place and it is a jelly-like substance.
How did science play a role in diagnosing the water problem in Flint
Answer:
Explanation:
by desolving it
systems of body which holds sperm and eggs
Answer:
i- are u
Explanation:
what is a condensed structure that contains the DNA that are visible during mitosis?
As the amount of water vapor in the air increases, what happens
A. The temperature increases
B. The relative of humidity increases
C. The temperature decreases
D. The relative of humidity decreases
Answer:
B
Explanation:
PLEASE HELP, WILL MARK BRAINLEST TO WHO ANSWERS FIRST WITH THE RIGHT ANSWER
The diagram below shows the sequence of events and processes which resulted in the origin of life.
Picture shows a flow chart with a rectangle labeled non-living matter at the top, an oval labeled A below it, and a rectangle labeled appearance of bacteria at the bottom.
Which of these processes best fits the oval labeled A?
chemical evolution
biological evolution
atmospheric transformation
geological transformation
Answer:
chemical evolution
Explanation:
This type of evolution is what we believe started the origin of life. Chemical evolution is when something changes to have different abilities (which in this case would be true).
Have a great day everybody!
What is Lucy? This is for Science they said it’s a gorilla I think I just need confirmation.
14. Scientist wanted to know if temperature effected the movement of
blackworms. What is the dependent variable?
-Temperature
-Movement
-Amount of Blackworms
-Scientists
Answer:
movement
Explanation:
the movement depends on the temp.
Answer:
movement
Explanation:
i hope its helps u
Which of the following lives in the pelagic zone?
sea birds
crabs
plants
fish
Which nitrogen-containing substance is formed when amino acids are broken down?
Answer:
Urea
Explanation:
Urea is produced in the liver and is a metabolite (breakdown product) of amino acids.
Negative feedback: If blood pressure is high, the blood vessels should
A. dilate (open up more)
B. constrict (get tighter)
Answer:
B. constrict (get tighter)
Explanation:
Help PLEASEEEEEE. WHAT DO I PUT IN THE GRAPH !!!!!111
I need help ASAP
Match the following definitions with the correct terms:
1. BB or Bb
2. purple-flower or white flower
3. Bb
4. Used to predict the possible genotypes and phenotypes from a genetic cross
Options to choose from:
- Genotype
- Heterozygous
- Phenotype
- Punnett square
What kind of macromolecule is pictured below
Answer:
im going to go with lipid. im sorry if its wrong
Explanation:
1 point
What chemical compound is responsible for the rotten egg smell that is
typical of seal farts?
Hydrogen disulphide
Hydrogen monoxide
Hydrogen peroxide
Hydrogen chloride
Answer:
Hydrogen disulfide
Explanation:
Hydrogen disulfide , which is responsible for the rotten-egg scent, is toxic rather than simply smelly, if inhaled at concentrations above 700 parts per million.
It can be present at very low concentrations well below those considered to induce health effects. The scent of sulfide hydrogen does not affect your well-being.
Answer:
Hydrogen monoxide
Explanation:
It is very toxic to smell in farts
Where would a frameshift mutation cause the most damage?
Near the very end of the gene
Near the beginning of the gene
Near the center of the gene
All frameshift mutations are equal
What is a neuron? What is its job?
Answer:
Neurons, also known as nerve cells, send and receive signals from your brain.
JOB; Neurons are information messengers. They use electrical impulses and chemical signals to transmit information between different areas of the brain, and between the brain and the rest of the nervous system.
Explanation:
what can be analyzed to determine how many base pairs a segment of dna has?
1. A mixture is a blend of two or more substances that have NOT
A. combined chemically
B. dissolved
C. been mixed together
Please answer as soon as possible !!
Answer:
A. combined chemically
Explanation:
The primary reason for cell division, is to
A Grow
B Repair damage
C Replace themselves
D All of the above
First to answer gets brainliest plz try on it though
Answer:
A
Explanation:
Which statement is true about photosynthesis?
Select one:
Photosynthesis happens in the mitochondria.
During photosynthesis, energy from the sun is stored in the chemical bonds of a glucose molecule.
One of the inputs of photosynthesis is oxygen.
Photosynthesis releases energy to the environment.
Answer:
during photosynthesis energy from the Sun is stored in chemical bonds of a glucose molecule
