Within normal limits, an increase in preload leads to
A. an increase in cardiac output and force of left ventricular contraction.
B. a decrease in cardiac output and force of left ventricular contraction.
C. an increase in cardiac output and a decrease in force of left ventricular contraction.
D. a decrease in cardiac output and an increase in the force of left ventricular contraction.
E. a decrease in stroke volume and heart rate.
A
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A failure to maintain homeostatic conditions in the body is known as ________.
A) growth B) respiration C) homeopathy D) disease E) excretion
Which of the following results in noninsulin-dependent diabetes mellitus?
A. Excessive secretion of insulin triggers hypoglycemia. B. Insulin binds to its target cells but the cAMP second-messenger system fails to work. C. Glucagon is able to compensate for the deficiency of insulin. D. Somatostatin is able to compensate for the deficiency of insulin. E. Insulin is secreted but target cells lack receptors for it.
Macrophages are motile cells that crawl within tissues of the cells. Hepatocytes are stationary cells that are anchored in place within the tissue. Compared to hepatocytes, macrophages would likely have more of which cytoskeletal filament?
A. Microtubules B. Actin filaments C. Cilia D. Myosin filaments E. Intermediate filaments
The cardioregulatory center of the brain is located in the
A. hypothalamus. B. medulla oblongata. C. cerebellum. D. cerebrum. E. diencephalons.