Which center bears the primary responsibility for generating the respiratory rhythm, but is influenced by several other centers?
A. SRG
B. VRG
C. DRG
D. PRG
Answer: B
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This figure shows an example of regulation of hormone secretion by a negative feedback loop. The large box labeled 1 represents the initial stimulus. What hormones are represented by the small boxes labeled a, b, and c?
A. a = TSH, b = TRH, c = TH B. a = TIH, b = TSH, c = TH C. a = TRH, b = TSH, c = TIH D. a = TRH, b = TSH, c = TH E. a = TSH, b = TH, c = TRH
The hair papilla, structure A, consists of A) adipose tissue.
A) adipose tissue.
B) keratin.
C) collagen.
D) blood vessels and nerves.
E) skeletal muscle.
Impulses travel in the spinal cord through horns, which contain tracts
Indicate whether the statement is true or false
Which germ layer is the thymus derived from?
A. Endoderm B. Mesoderm C. Ectoderm