Exam 8: Muscle Physiology

Which of these terms refers to a chronic state of increased arterial pressure?

Match the arteriolar effects, labelled a. through c., with the tissues in question. (Options may be used more than once or not at all.) a.would produce arteriolar vasoconstriction b.would produce arteriolar vasodilation c.would not cause any change in arteriolar calibre -sympathetic stimulation of kidney arterioles

Which principal force causes movement of fluid from tissues into capillaries?

Blood flows continuously through all capillaries.

Decreased parasympathetic nerve activity _____ total peripheral resistance.

The flow rate of blood is the same in all segments of the vascular tree, but the velocity of blood flow is slower in the capillaries than in other segments of the vascular tree.

Increased sympathetic stimulation causes generalized vasoconstriction.

If the pulse pressure is 44 mmHg, and the diastolic pressure is 68 mmHg, what is the systolic pressure?

Which of these statements correctly describes venous valves?

Which of the following statements correctly describes veins?

Due to contraction of its smooth muscle layer, an artery ensures that blood flows constantly.

Which of the following does NOT occur to compensate for a fall in blood pressure below normal?

In which of these vessels is the largest total cross-sectional area found?

Decreased rate of firing in afferent nerves reaching the cardiovascular control centre _____ the parasympathetic nerve activity to the cardiovascular system.

It is considered hypertension if the systolic/diastolic pressure is above the value of ____________________.

Match the arteriolar effects, labelled a. through c., with the tissues in question. (Options may be used more than once or not at all.) a.would produce arteriolar vasoconstriction b.would produce arteriolar vasodilation c.would not cause any change in arteriolar calibre -histamine release in an injured tissue

Which vessels contain the highest percentage of total blood volume?

A decrease in plasma-colloid osmotic pressure will decrease ultrafiltration and increase reabsorption at the capillary level.

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 -release of renin

The greatest pressure drop in the vascular system occurs within the capillaries due to fluid leaving the capillaries by the process of ultrafiltration.