Exam 8: Muscle Physiology

Match the terms, labelled a. through d., with the correct characteristics. a.reactive hyperaemia b.active hyperaemia c.pressure autoregulation d.extrinsic control -important in maintaining an adequate pressure head to drive blood forward to the tissues

Through which of these vessels is the velocity of blood flow the slowest?

Sympathetic activity controls the degree of resistance in arterioles.

Which of the following is correct for the major function of the arterioles?

What is the primary reason that oedema may occur with serious burns?

Match the effects, labelled a. through d., with the events in question. (Options may be used more than once or not at all.) a.increase BP b.decrease BP c.increase heart rate only d.have no effect on BP or heart rate -increased release of aldosterone

Match the types of vessel, labelled a. through e., with the function(s) they perform. (Options may be used more than once or not at all.) a.arteries b.arterioles c.capillaries d.veins e.lymphatics -vessels that pick up fluid that is filtered but not reabsorbed

Match the effects, labelled a. through e., that the changes in question would have on bulk flow. (Options may be used more than once or not at all.) a.The change would increase ultrafiltration and decrease reabsorption. b.The change would decrease ultrafiltration and increase reabsorption. c.The change would increase both ultrafiltration and reabsorption. d.The change would decrease both ultrafiltration and reabsorption. e.The change would not alter ultrafiltration and reabsorption. -loss of plasma volume due to haemorrhage

What haemodynamic changes occur when an individual goes from a resting state to an active state?

Increased skeletal muscle activity _____ venous return.

Vasopressin is a vasodilator.

Total peripheral resistance is dependent primarily on ____________________.

The interstitial fluid is not part of the ECF.

Match the terms, labelled a. through d., with the correct characteristics. a.reactive hyperaemia b.active hyperaemia c.pressure autoregulation d.extrinsic control -arteriolar dilation that occurs within a tissue in response to local chemical changes that accompany increased metabolic activity of the tissue

Match the effects, labelled a. through d., with the events in question. (Options may be used more than once or not at all.) a.increase BP b.decrease BP c.increase heart rate only d.have no effect on BP or heart rate -increased release of vasopressin

Which of these statements correctly describes arteries?

Relaxation of arteriolar smooth muscle causes the radius of the vessel to ____________________, a process known as ____________________, whereas contraction of arteriolar smooth muscle causes the radius of the vessel to ____________________, a process known as ____________________.

Heart and venous valves serve a similar function. What type of flow do they prevent?

The receptors for the baroreceptor reflex are located in the ____________________ and ____________________, whereas the integrating centre is the ____________________ located in the ____________________. The efferent pathway for this reflex is the ____________________. The effector organs are the ____________________ and ____________________.

If the arterial blood pressure is recorded at 132/84, what is the mean arterial pressure?