A blood cell is journeying from the left thumb to the heart. It would probably NOT pass through the
A) left brachiocephalic vein
B) superior vena cava
C) left jugular vein
D) left subclavian vein
Ans: C) left jugular vein
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If a red blood cell is placed in a hypotonic solution,
A. the cell will shrink. B. only permeable substances will leave; but concentrations in the cell do not change. C. the cell will swell and may eventually burst. D. the cell will remain the same size and shape.
________, thereby stimulating the release of a paracrine factor from the macula densa that would ________.
A) afferent arteriolar pressure : constrict the afferent arteriole B) flow of tubular fluid : constrict the afferent arteriole C) flow of tubular fluid : dilate the afferent arteriole D) afferent arteriolar pressure : increase filtrate flow E) flow of tubular fluid : constrict the efferent arteriole
Which organ performs the major role in excreting nitrogenous wastes and excess water from the body??
A) ?Lungs B) ?Colon C) ?Skin D) ?Kidneys
During an acute asthma attack, the obstruction is caused by _______.
A. a spasm of the diaphragm B. bronchiole smooth muscle spasms C. loss of elastic recoil D. destruction of the walls of the alveoli