What occurs when one sympathetic preganglionic neuron synapses on several postganglionic neurons?
A. Cooperation
B. Convergence
C. Divergence
D. All of the choices are correct.
Answer: C
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Which of the drug treatments listed below is INCORRECTLY matched to a mode of action in treating hypertension?
A. Calcium channel blockers-reduce speed and force of contraction in vascular smooth muscle B. Alpha-adrenergic receptor blockers-reduce TPR by decreased stimulation of arteriolar smooth muscle C. Angiotensin-converting enzyme (ACE) inhibitors-reduce TPR by reducing angiotensin II concentrations D. Antagonists of parasympathetic receptors-reduce TPR by decreased stimulation of arteriolar smooth muscle E. ACE inhibitors-lowers peripheral resistance by promoting vasodilation F. Diuretics-reduce blood volume by increasing excretion of sodium and water in urine G. Beta-adrenergic receptor antagonists-reduce cardiac output by slowing heart rate and reducing contractility
When small blood vessels are damaged, loss of blood is prevented by
a. platelet aggregation b. vasoconstriction of these vessels c. formation of a platelet plug d. all of the above e. only a and c
These are the most abundant epidermal cells
A) melanocytes B) keratinocytes C) dendritic cells D) tactile cells
A mature red blood cell is useful for karyotyping.
Answer the following statement true (T) or false (F)