When a neuron is in the resting state, ________
A) Na+ leaks out of the cell and K+ leaks into the cell
B) both Na+ and K+ leak out of the cell
C) both Na+ and K+ leak into the cell
D) Na+ leaks into the cell and K+ leaks out of cell
Answer: D
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Preganglionic fibers leave the CNS and then synapse on
A) postganglionic fibers. B) visceral reflex responses. C) motor neurons. D) ganglionic neurons. E) afferent neurons.
The hypothalamic hormone that triggers the release of adrenocorticotropic hormone (ACTH) is
A. cortisol. B. corticotropin-releasing hormone (CRH). C. vasopressin. D. adrenal follicle-stimulating hormone. E. cortical stimulating factor (CSF).
Surfactant
A) is produced by pneumocytes type I. B) phagocytizes dust or debris. C) replaces mucus in the alveoli. D) plays a key role in keeping alveoli open. E) is not found in healthy lung tissue.
Type B blood contains antigen B and anti-B antibodies.
Answer the following statement true (T) or false (F)