A patient has an 80% blockage of his left anterior descending coronary artery. Describe what occurs in terms of myocardial oxygen supply and demand if his sympathetic nervous system is stimulated.
What will be an ideal response?
When the sympathetic nervous system is stimulated there is increased myocardial contractility, which increases cardiac output and blood flow to active muscles. This increases the demand for oxygen to the cells. The coronary artery is a major blood vessel of the heart. When the demand for myocardial oxygen exceeds the ability of the coronary arteries to supply it, death of myocardial tissue can occur.
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All of the following are examples of compensatory mechanisms that would occur as a result of metabolic acidosis except
A) buffer systems accept H+. B) kidneys secrete H+. C) kidneys retain H+. D) kidneys generate bicarbonate. E) respiratory rate increases.
The tissue lining the small intestine of the digestive tract is called
A) stratified columnar epithelium. B) simple squamous epithelium. C) stratified squamous epithelium. D) simple columnar epithelium. E) None of the answers are correct.
The anatomical snuff box ________
A) is defined by the tendons of the extensor pollicis brevis and longus B) lies between the radius and ulna C) lies within the nasal cavity D) is close to the maxilla
"Rest and digest," as well as the maintenance of homeostasis, is associated with the action of the ________ division of the ANS.
Fill in the blank(s) with the appropriate word(s).