Answer:
Vasodilation:
Vasodilation may be defined as the dilation of the blood capillaries around the skin. The blood capillaries gets widen. The vascular resistance to the blood flow decrease. The blood pressure near the skin decreases. The increase in temperature may cause vasodilation.
Vasoconstriction:
Vasoconstriction may be defined as the constriction of the blood capillaries around the skin. The blood capillaries gets narrow. The vascular resistance to the blood flow increases. The blood pressure near the skin increases. The decrease in temperature may cause vasoconstriction.
Answer:
There are two types of endoplasmic reticulum: rough endoplasmic reticulum (rough ER) and smooth endoplasmic reticulum (smooth ER). Both types are present in plant and animal cells. The two types of ER often appear as if separate, but they are sub-compartments of the same organelle.
Explanation:
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Answer:
As a cell prepares to divide, it must make a copy of each of its chromosomes. The two copies of a chromosome are called sister chromatids.
