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Answer:
A
Explanation:
After the blood has passed through the capillary beds, it enters the venules, veins, and finally the two main venae cavae (singular, vena cava) that take blood back to the heart. The flow rate increases again, but is still much slower than the initial rate in the aorta.
Since pathogens are easily passed from person to person, they need large populations to spread and survive. If they did not have a large population, the pathogens would die out.
Answer:
The correct answer is A, as the statement is true. All blood returns to the heart by way of either the superior vena cava or the inferior vena cava.
Explanation:
The heart pumps blood to all parts of the body. Blood supplies oxygen and nutrients to the entire body and removes carbon dioxide and residual elements. As blood travels through the body, oxygen is consumed and blood becomes deoxygenated.
Deoxygenated blood returns from the rest of the body to the heart through the superior vena cava and the inferior vena cava, the two main veins that carry the blood back to the heart.
Which of the following is NOT a characteristic of the plasma membrane?
A. Contains different types of proteins
B. It is easily crossed by small non-polar molecules
C. It is composed of a phospholipid bilayer
D. Maintains cell shape
Among the given options, the one that is not a function of the plasma membrane is D. the Maintain center of the cell.
The cell membrane is the thin cell barrier found on the surface of all animal or plant cells, thus present in all cells. The cell membrane's primary characteristics are containing more amounts of proteins than lipids. Additionally, it is composed of phospholipid bilayers that allow water-soluble compounds to enter the cell, making them nonpolar compounds. They have selective permeability that allows uptake of particular substances while blocking the entry of others.
However, the microtubules constitute the cytoskeleton to control cell shape or cell movement.
