A patient takes a nitroglycerin tablet sublingually for chest pain. Nitroglycerin acts directly on smooth muscle, producing relaxation and vessel dilation. How would this relieve chest pain?
What will be an ideal response
Angina pectoris is thoracic pain caused by a fleeting deficiency in blood delivery to the myocardium, with resulting decreased oxygen being delivered to the cells. Because nitroglycerin acts as a vasodilator (similar to nitric oxide), blood flow is increased, promoting the delivery of oxygen to the cells.
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How do large polar molecules, such as the protein hormones secreted by endocrine cells or bacteria ingested by white blood cells, leave or enter the cell?
a. by the process known as vesicular transport b. by the process of osmosis c. by selective passive transport d. by the help of large lipid carriers e. by the help of large protein carriers
The most anterior portion of the sclera is the
A. Cornea B. Iris C. Pupil D. Conjunctiva
Pheochromocytomas would stimulate hypersecretion of ________.
A. cortisol B. adrenocorticotropin C. aldosterone D. epinephrine and norepinephrine
Explain why a pseudostratified epithelium is not truly stratified
A) All the cells do not contain a nucleus. B) All the cells are not columnar. C) All the cells form a single layer and contact the basement membrane. D) All the cells' nuclei are round instead of elongated. E) All the cells are not linked by tight junctions.