When estrogen is increased in females at puberty, epiphyseal plates
A) widen.
B) become narrower.
C) increase slowly.
D) accelerate rapidly, but mostly in thickness.
E) are hardly affected.
Answer: B
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A light skinned person may appear pink when they become over heated. The best explanation for this is ________
A) the blood vessels of the dermis have undergone vasodilation, bringing a greater volume of blood to the skin B) the heart is pumping faster because the person was probably exercising C) blood flow has increased to the sweat glands in order to increased their metabolic activity D) the melanocytes are responding to the heat of the sun and change the appearance of the skin with increased production
________ is a fine, unpigmented, downy hair that first appears on the fetus in the last trimester of development.
Fill in the blank(s) with the appropriate word(s).
What would most likely lead to an inhibitory postsynaptic potential (IPSP)?
A) opening of calcium ion channels B) closure of chloride ion channels C) opening of sodium ion channels D) opening of potassium ion channels
The ________ circuit consists of the chambers on the right side of the heart as well as the pulmonary arteries and veins.
Fill in the blank(s) with the appropriate word(s).