The extent of potassium excretion is regulated primarily by the
A) amount reabsorbed into the proximal tubule.
B) amount secreted into the distal tubule.
C) amount secreted into the proximal tubule.
D) amount reabsorbed in the distal tubule.
E) amount filtered by the basement membrane of the glomerular capillaries.
Ans: B) amount secreted into the distal tubule.
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A condition called megacolon, which results from excess dilation of the colon proximal to a region of functional obstruction, would most likely be caused by
A) a great increase in the level of sympathetic activity in the region. B) too much activity in the sympathetic chain ganglia. C) a great increase in parasympathetic activity in the local region. D) reduction of parasympathetic innervation in the region. E) None of the answers are correct.
Define the underlined terms in the following case study. An agouti member of the family Mustelidae presented to the clinic as a victim of a wound to the anogenital distance. The owner, who identified herself as an antivivisectionist, reported extreme exsanguination arising from the wound
What will be an ideal response?
Which does not empty into the confluence of sinuses?
A. sigmoid sinus B. straight sinus C. occipital sinus D. superior sagittal sinus
Increased strength of a trained muscle is due to
A. the nervous system's ability to recruit a large number of motor units simultaneously. B. elimination of unnecessary enzymes and metabolic pathways. C. elimination of unnecessary connective tissue. D. elimination of all adipose tissue. E. an increased number of muscle fibers.