The osmoreceptors contributing to water balance and vasopressin secretion are located in the:
a. adrenal cortex.
b. hypothalamus.
c. juxtaglomerular apparatus.
d. renal cortex.
e. renal medulla.
B
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The fastest rate of mitosis happens in the __________.
A. stratum basale B. stratum spinosum C. stratum granulosum D. stratum lucidum E. stratum corneum
Intracellular signaling pathways within target cells are organized such that
A. each step allows for amplification of the signal where one molecule can activate many. B. each step involves one molecule activating or synthesizing exactly one other molecule for precise control. C. enzymes are used up and degraded after each individual reaction they catalyze.
The innermost layer of the heart wall is the
A) parietal and visceral layers of the epicardium. B) endocardium C) fibrous pericardium. D) connective tissue. E) myocardium.
Which of the following is an extension of the pia mater?
a. denticulate ligaments b. filium terminal c. spinal roots d. a and b