Which of the following is released by endothelial cells and targets smooth muscles surrounding the blood vessels? dopamine O serotonin O nitric oxide arginine O nitroglycerin << Previous MacBook Pro Next ▸
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- Which of the following is a circulatory adjustment to sustained moderate exercise? A. Constriction of the cutaneous circulation B) Decreased intestinal blood flow C. Decreased venous return D. Increased renal blood flow E) Increased total peripheral vascular resistarIf blood pressure suddenly drops (not more than 10 mmHg) which of these mechanisms will be activated to restore blood pressure a) CNS ischemia reflex b) baroreceptor reflexes c) chemoreflexesAs the patient’s blood pressure decreased from the loss of blood, neural impulses transmitted from to the vasomotor and cardiac centers in the medulla (decreased____________; increased_____________).
- After being stung by a wasp he was trying to kill, Michael expereinces anaphylactic shock. His mast cells release massive amounts of histamine. What would be the impact on his blood vessels, stroke volume, heart rate and mean arterial pressure? Explain reasoning for each.What effect does sympathetic stimulation have on stroke volume if thevenous return remains constant? Dilation of the coronary blood vesselsoccurs in response to an increased heart rate and stroke volume. Explainthe functional advantage of that effect.When a person engages in strenuous, prolonged exercise, a. blood flow to the kidneys is reduced.b. cardiac output is reduced.c. total peripheral resistance increases.d. systolic arterial blood pressure is reduced.e. blood flow to the brain is reduced.
- Total blood flow in the cerebral circulation a. varies with systemic arterial pressure. b. is regulated primarily by the sympathetic system. c. is maintained constant within physiological limits. d. increases significantly during exercise.Which of the following is a circulatory adjustment to sustained moderate exercise?a. Constriction of the cutaneous circulationb. Decreased intestinal blood flowc. Decreased venous returnd. Increased renal blood flowe. Increased total peripheral vascular resistanceWhat are the major compensatory responses to blood loss and which hormones are involved. Describe the process of autoregulation in order to insure supply to vitally important organs (brains, kidneys, heart, and etc.)
- Sympathetic impulses to the smooth muscles in the walls of arteries and arterioles produceA. Vasodilation only C. Vasomotor inhibitionB. Vasodilation and vasoconstriction D. Arteriosclerosis Substances exchanged at the capillary level move through the capillary walls byA. Diffusion B. Filtration C. Osmosis D. Active transport In the measurement of blood pressure, the cuff of the sphygmomanometer usually surroundsA. The radial artery C. The brachiocephalic arteryB. The dorsalis pedis artery D. The brachial artery Arterial blood pressure is independent ofA. Blood Volume B. Heart rate C. Blood Viscosity D. Influx of calcium ions Identify the TRUE statement (s). There may be several correct answers,A. An increased cardiac output is reflected in an elevated diastolic pressure.B. An increased cardiac output is reflected in a decreased diastolic pressure.C. An increase in the force of contraction produces an elevated…Identify the most commonly used antihypertensives that can produce orthostatic hypotension. Which of the drugs affecting the sympathetic nervous system can also cause bradycardia? Describe the most significant adverse effects of direct acting vasodilators. Compare their effects to phosphodiesterase inhibitors.When experiencing stress, the effects of the epinephrine circulating in the body will result in a. bradycardiab. decreased heart contractilityc. increased skeletal muscle blood supplyd. hyperglycemia