A patient is prescribed a calcium channel blocker to prevent angina (chest pain), by decreasing the demand for oxygen. Explain why
What will be an ideal response
By preventing the influx of calcium ions into myocardial and vascular smooth muscle cells, calcium channel blockers inhibit the intracellular release of additional stores of calcium ions. A drug that inhibits the release of intracellular calcium ions decreases the force of myocardial contractility, thereby decreasing the oxygen demand.
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Which of the following is least related to glucose uptake by different cells in the body?
a. receptor-mediated endocytosis b. facilitated diffusion c. carrier-mediated transport d. secondary active transport e. cotransport
All the following statements concerning the cerebellum are correct EXCEPT:
A) projects to the red nucleus B) projects to the vestibular nuclei C) projects to the lateral ventral nucleus of the thalamus D) receives input from the superior olivary nucleus E) receives the olivocerebellar tract via the inferior cerebellar peduncle
In bioenergetic pathways, as intermediates are acted upon by enzymes, the ultimate result is the release of ________.
A. enzymes B. lactate C. free energy D. ATP
When seated, the weight of the body is borne by the
A) ischial tuberosities. B) posterior inferior iliac spines. C) iliac crests. D) obturator foramen. E) inferior rami of the pubis.