Endocrine tissues that secrete steroid hormones are derived from
a) mesoderm.
b) endoderm.
c) ectoderm.
d) a combination of two or more layers.
e) none of the layers that are listed.
a
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Loop diuretics reduce body water content by acting on the ________.
A. aquaporins of the collecting duct B. feedback loop between the kidney and posterior pituitary gland C. countercurrent exchanger system D. thirst mechanism and water intake E. countercurrent multiplier system
During the alarm phase of the general adaptation syndrome (GAS), there is
A) decreased blood flow to skeletal muscles and skin. B) decreased mental alertness. C) mobilization of energy reserves. D) increased urine release. E) decreased rate of respiration.
Which muscle fiber type contains only a few mitochondria because it does not rely on aerobic respiration?
A) Slow oxidative (red) B) Fast oxidative (pink) C) Fast glycolytic (white)
The three tiny bones of the middle ear are collectively known as the ________.
A. pinnas B. cerumen C. ossicles D. cochleas