Neurons either conduct action potentials along the length of their axons, or they remain at rest. This statement best describes ________
A) a reflex arc
B) the all-or-none response
C) repolarization
D) saltatory conduction
E) graded potential
B
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Under normal circumstances, aged and damaged erythrocytes are broken down by the
A) kidneys. B) thymus gland. C) spleen. D) digestive tract. E) yellow bone marrow.
The main sympathetic nerve supply to the digestive tract is the vagus
Indicate whether the statement is true or false
As blood flows through the nephron, where does it go immediately after the afferent arteriorle?
A. Peritubular capillaries B. Glomerulus C. Efferent arteriole D. Renal vein
Which of the following major layers of the digestive tract is described as a layer of dense irregular connective tissue filled with blood vessels and the plexus of Meissner?
a. muscular externa b. submucosa c. mucosa d. serosa