Which of the following is NOT an endocrine gland aging effect?
a) Rise in the blood levels of PTH
b) Less cortisol and aldosterone production
c) Decreased levels of gonadotropins
d) Decreased levels of calcitriol and calcitonin
e) Increase in thymus size
e
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Two areas of the brain missing the blood-brain barrier are the ________ and ________.
Fill in the blank(s) with the appropriate word(s).
A lumen is a cavity within a hollow organ or tube
Indicate whether the statement is true or false
In the process of depolarization of a neuron, the ________ flow of Na+ causes the ECF along the outside of plasma membrane to become ________ charged.
A. outward; positively B. inward; negatively C. inward; positively D. outward; negatively
The poliovirus selectively destroys what part of the somatic nervous system?
a. blood vessels that supply motor neurons b. dendrites of motor neurons c. cell bodies of motor neurons d. axons of motor neurons e. neurotransmitters