Neuroeffector junctions are varicosities where motor neurons release neurotransmitters to non-neuronal target cells. These junctions can be observed along the axon.
- The motor nerve varicosities RELEASE neurotransmitters onto smooth muscle cells.
- There are many varicosities along the axons of the neurons that feed smooth muscle cells.
- When autonomic neurons are stimulated, varicosities release neurotransmitters along their axons.
- These neurotransmitters then diffuse through the interstitial fluid to interact with receptors in the smooth muscle cells.
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Answer:
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Explanation:
Blood vessels constrict and platelets release fibrin proteins, which tangle together to form a clot and close the wound when the skin is penetrated. The blood arteries then dilate again, allowing white blood cells to flood the wound. These go after any bacteria that managed to get through the blockage.
Cuts and scratches are damaged regions on the skin's surface. A cut is a line of damage that can penetrate the skin and into the muscular tissues beneath it, whereas a scratch is superficial damage that does not enter the lower tissues. Cuts and scrapes can bleed, turn red, develop infected, and leave scars if they are not treated promptly.
Your skin may begin to bleed after a cut, scrape, or abrasion. Because the damage fractures or rips the small blood vessels just beneath the skin's surface, this occurs. The platelets blood come to the rescue when your body needs to stop the bleeding.
Answer:
Most fossils are found in sedimentary rocks, those rocks produced by the accumulation of sediment such as sand or mud. Wind and other weathering conditions wash away sediment on land, depositing it in bodies of water. For this reason, fossils of sea creatures are more common than those of land creatures.
Explanation:
Answer:
This organism is best classified as an autotroph.
Explanation:
Autotrophs can make their own food.
<em>water is important because it gives space to the substances to get in it also it makes the substances wet and dissolve the gases in it ,to transport them from one place to another... </em>