What effect does a calcium channel blocker have on the heart, the blood pressure, and cardiac output? Why?
What will be an ideal response?
Calcium channel blockers inhibit the opening of calcium channels and ensuing calcium current. Vascular smooth muscle dilates, and heart rate decreases. Vasodilation will result in a decrease in systemic blood pressure, and the decrease in heart rate will decrease cardiac output.
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Boyle's law states that the pressure exerted by a gas varies directly with the volume of the gas
Indicate whether the statement is true or false
Which of the following statements is true regarding the gray matter of the cerebrum?
A. It is located only in the cerebral cortex. B. It is found in the cerebral cortex of the frontal, parietal, and occipital lobes but does not cover the entire temporal lobe. C. It is found both in the superficial cortex and in deeper basal nuclei. D. It consists mainly of nerve cell bodies and unmyelinated fibers and is found both in the superficial cortex and in the substantia nigra. E. It consists mainly of nerve cell bodies and myelinated fibers.
Unicellular exocrine glands secrete
A) milk. B) sweat. C) mucus. D) sebum. E) insulin.
When the tubular maximum for a substance is exceeded,
A. more of the substance is reabsorbed. B. more of the substance is actively secreted. C. less of the substance is filtered in the renal corpuscle. D. the excess goes into the blood. E. the excess remains in the urine.