Quiz 4

Why do fluids leave the capillaries at the arterial end? - The net filtration pressure of the blood is higher at the arterial end than it is at the venous end. - The net filtration pressure of the blood is higher at the venous end than it is at the arterial end. - The net filtration pressure of the interstitial fluid is higher at the arterial end than it is at the venous end. - The net filtration pressure of the interstitial fluid is higher at the venous end than it is at the arterial end. - The osmotic pressure is higher at the arterial end than it is at the venous end.

Approximately what percent of fluid that exits the capillaries at the arterial end renters the capillaries at the venous end? - 45% - 65% - 25% - 90% - 100%

The net osmotic pressure is equal at both the arterial and the venous ends of the capillary.

Which of the following contains chemoreceptors? - Medulla oblongata - Pons - Hypothalamus - Thalamus - Spinal cord

Increased sympathetic stimulation causes vasodilation, bringing elevated blood pressure back to normal.

Which of the following is not a mechanism that assists venous return? - Pressure generated by the heart - Gravity - The skeletal muscle pump - Central venous pressure being greater than pressure in the venules - Cardiac suction