As an astronaut is lifted into Earth's orbit, what is the first change to take place in response to the drop in cabin pressure?
A) increased hematocrit
B) renal hypoxia
C) increased alveolar ventilation rate
D) decreased alveolar PO2
E) decreased hemoglobin saturation
Answer is D) decreased alveolar PO2
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The presence of protein in the stomach stimulates the release of histamine, which in turn promotes HCl and pepsinogen secretion
Indicate whether the statement is true or false
Local hyperpolarization in a synapse is called a(an)
A. excitatory postsynaptic potential. B. resting membrane potential. C. inhibitory postsynaptic potential. D. gap junction potential. E. action potential.
The life span of an erythrocyte is about ________ days.
A. 60 B. 120 C. 30 D. 10 E. 360
The release of hormones from the adrenal medulla is stimulated by
A. the sympathetic division of the autonomic nervous system. B. adrenocorticotropic hormone. C. thyrotropic hormone. D. growth hormone. E. follicle-stimulating hormone.