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rjkz [21]
3 years ago
13

Veins returning to the heart can close to prevent the backflow of blood. Which component in the veins contributes to this proces

s?
Biology
1 answer:
Sedbober [7]3 years ago
3 0
The valves are an aid to help prevent backflip and keep circulation a one-way system
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Explain why there is a greater efficiency in supplying plants as human food
Mumz [18]

Answer:

Does this help?

Explanation:

Plants are very efficient when it comes to supplying for people. Plants not only allow us to breath, but we can also feed off them. We can always grow plants. Planting is also better for the environment. Less people will pay for fruits and vegetables. Even with all the advantages of just supplying plants as human food, it would be almost, if not impossible to feed the entire population all year off salads.

6 0
3 years ago
A flat area on a mountain is known as ?
stepan [7]
Hello! Mesa, (Portuguese and Spanish for table) is the American English Term for tableland, an elevated area of land with a flat top and sides that are usually steep cliffs. It takes its name from its characteristics table-top shape. It may asl be called a table hill, table-topped hill or table mountain. I hope this helps! :)
5 0
3 years ago
Neurotransmitters are released from axon terminals via _______. A. osmosis B. active transport C. diffusion D. exocytosis
Nutka1998 [239]

The correct option is D

Neurotransmitters are released from axon terminals via exocytosis.

A neurotransmitter is stored inside synaptic vesicles which is a small sac-like structure. It is released into the synaptic cleft from axon terminals when a cell membrane fuses with vesicles. This process is termed exocytosis with the capability to release neurotransmitters in less than a millisecond.

In neurons of the nervous system, synaptic vesicle exocytosis occurs. Nerve cells communicate by electrical or chemical signals called neurotransmitters which are passed from one neuron to the next one. This transmission of neurotransmitters occurs by exocytosis.

The fundamental biological events of neurotransmission are dependent on neuronal communication and brain function including exocytosis of presynaptic vesicles which is for the release of neurotransmitters and the subsequent endocytosis.

Learn to know more about the release of neurotransmitters from a neuron on

brainly.com/question/12993033

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6 0
1 year ago
Which product is the result of light reactions in photosyintheis
kodGreya [7K]

Answer:

Oxygen

Explanation:

Plants take in water, Carbon Dioxide and light to make oxygen for humans and animals to breath.

4 0
3 years ago
How does dew form on grass?
svetlana [45]

Answer:

Dewy Grass. Dew is a natural form of water, formed as water vapor condenses. ... This forces water vapor in the air around cooling objects to condense. When condensation happens, small water droplets form—dew.

so it's C

Explanation:

8 0
3 years ago
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