Exam 2

The heart absorbs oxygen and nutrients from the blood within coronary circulation.

• True

• False

At any given time only about one quarter of the capillary beds are open because there is not enough blood to fill them up.

• True

• False

There are 3 main types circulation.

• True

• False

Which of the following results in an increase in blood pressure? (CHECK ALL THAT APPLY)

• Aldosterone

• Angiotensin ll

• ANP

• ADH

Which are functions performed by the fibrous skeleton of the heart? (CHECK ALL THAT APPLY)

• Separates the atria and ventricles

• Anchors the heart valves

• Provides electrical insulation between the atria and ventricles

• Provides the framework for the attachment of the myocardium

• None of these are true functions of the fibrous skeleton of the heart

Continuous arteries are found where?

• red bone marrow

• spleen

• capillaries

Cardiac muscle cells have great demand for energy. They are able to meet this demand by

• being capable of using various molecules as a source of energy

• containing only a few high energy-demanding mitochondria

• relying on anaerobic respiration

• relying of both aerobic and anaerobic respiration

• having limited blood supply

Antidiuretic hormone has which of the following effects:

• vasoconstriction, increased urine output, and therefore increased blood pressure.

• vasodilation, increased urine output, and therefore decreased blood pressure

• vasoconstriction, decreased urine output, and therefore increased blood pressure

• vasodilation, decreased urine output, and therefore increased blood pressure

• vasoconstriction, sodium retention, and therefore increased blood pressure

Which of the following is true about renin-angiotensin system?

• Renin is released by the liver in response to high blood pressure

• Angiotensinogen is produced from the kidney

• Angiotensin l becomes Angiotensin ll in the posterior pituitary

• Most of conversion of angiotensin I to angiotensin II happens in the lungs.

How does the net filtration pressure changes as blood moves from the arterial end to the venous end of a capillary?

• Remains the same

• Decrease because the hydrostatic pressure decreases

• Decrease because the colloid osmotic pressure decreases

• Increases because the colloid osmotic pressure increases

• Increases because the hydrostatic pressure increases