A lipid that has been implicated in causing heart and blood vessel problems, but is necessary for the production of corticosteroids, is
A) aldosterone.
B) cholesterol.
C) unsaturated fat.
D) sugar.
E) None of the answers are correct.
B) cholesterol.
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Between the start of the latent period and the start of the contraction period, there is a time interval during which the muscle cannot respond to another stimulus. This brief period is known as the:
A) tension period. B) relaxation period. C) refractory period. D) action potential.
Veins
A. may contain valves and are lined with endothelium. B. have thick, many layered walls. C. are described as strong, rigid vessels that always carry oxygenated blood. D. carry blood under very high pressure. E. carry blood away from the heart.
Define module, and state where the learning outcomes appear
A) A module is an independent, self-contained unit about a specific topic. Learning outcomes appear in the upper left-hand corner of each module. B) A module is an independent, self-contained unit about a specific topic. Learning outcomes appear in the lower left-hand corner of each module. C) A module is an independent, self-contained unit about a specific topic. Learning outcomes appear in the lower right-hand corner of each module. D) A module is a chapter containing information over a body system. Learning outcomes appear in the lower right-hand corner of each module. E) A module is a chapter containing information over a body system. Learning outcomes appear in the upper right-hand corner of each module.
Typically, alpha adrenergic receptors have
A. stimulatory effects. B. inhibitory effects.