Lecture Quiz #6 (Blood Vessels) A&P 232

The hepatic portal vein __________. a) receives blood from the digestive organs b) has a lower level of dissolved nutrients than the rest of the veins of the systemic circuit c) is not used once birth has occurred d) carries deoxygenated blood from the liver to the inferior vena cava

A

What is the main chemical stimulus for cerebral autoregulation? a) pH b) Sodium levels c) CO2 levels d) O2 levels

A

Which of the following is not a mechanism that assists most venous return of blood? a) Central venous pressure being greater than pressure in the venules b) The skeletal muscle pump c) Cardiac suction d) Pressure generated by the heart e) Gravity

A

Which of the following vessels join to form the basilar artery? a) The vertebral arteries b) The carotid arteries c) The posterior inferior cerebellar arteries d) The posterior cerebral arteries

A

Which of the following will not increase the heart rate? a) Increased blood pressure b) Decreased blood oxygen c) Decreased blood pH d) Increased blood carbon dioxide

A

Why do fluids leave the capillaries at the arterial end? a) The net filtration pressure of the blood is higher at the arterial end than it is at the venous end. b) The net filtration pressure of the interstitial fluid is higher at the venous end than it is at the arterial end. c) The net filtration pressure of the interstitial fluid is higher at the arterial end than it is at the venous end. d) The net filtration pressure of the blood is higher at the venous end than it is at the arterial end. e) The osmotic pressure is higher at the arterial end than it is at the venous end.

A

Which of the following occur during a period of exercise? Check all that apply. a) The sympathetic nervous system can selectively reduce blood flow to the kidneys and digestive tract. b) The sympathetic nervous system can increase perfusion of the skeletal muscles. c) Metabolite accumulation in a tissue can stimulate local vasodilation. d) The parasympathetic nervous system can selectively reduce blood flow to the kidneys and digestive tract. e) Metabolite accumulation in a tissue can stimulate local vasoconstriction.

A, B, C

How is increased muscle perfusion during exercise accomplished? Check all that apply. a) Arterioles dilate in response to epinephrine and norepinephrine. b) Precapillary sphincters dilate in response to muscle metabolites such as lactic acid, CO2, and adenosine. c) Muscular contraction compresses the blood vessels. d) Precapillary sphincters constrict in response to muscle metabolites such as lactic acid, CO2, and adenosine. e) Blood is diverted from other organs such as the digestive tract and kidneys to meet the needs of the working muscles.

A,B,E

The lateral vessel in the forearm is the _____ artery and the lateral vessel in the leg is the ____ artery. a) ulnar; anterior tibial b) radial; fibular c) radial; deep femoral d) brachial; posterior tibial

B

Which of the following is not detected by chemoreceptors in the carotid and aortic bodies? a) Oxygen b) Blood pressure c) pH d) Carbon dioxide e) Oxygen and carbon dioxide

B

If you were looking at cross-sections of two blood vessels on a microscope slide, what features could you use to distinguish arteries from veins? a) All arteries have a tunica adventitia, whereas not all veins do. b) The vein wall is thinner, but with a smaller lumen than the artery. c) The artery wall is thicker, but the lumen is smaller. d) The veins and arteries both have valves, but those of the veins are larger.

C

Typically blood is drawn from the __________vein, a vessel found in the anterior elbow. a) ulnar b) basilic c) median cubital d) saphenous

C

Where are baroreceptors found? a) Common iliac arteries b) Carotid veins c) Subclavian arteries d) Carotid sinuses e) Aorta and subclavian veins

C

Which of the following correctly lists blood flow from the heart to the leg? a) Left common iliac, left femoral, anterior tibial, and popliteal b) Right common iliac, right internal iliac, and right femoral c) Abdominal aorta, right external iliac, and popliteal d) Aortic arch, abdominal aorta, femoral, and external iliac

C

Oxygenated blood supplies the brain through the __________. a) external carotid artery b) superficial temporal artery c) jugular vein d) internal carotid artery

D

Which of the following statements about capillaries is FALSE? a) Water returns from tissues into the blood within capillary beds by the process of osmosis. b) Capillaries have thin walls, meaning that gas diffusion distances are short. c) Capillaries are a little larger than the diameter of a single red blood cell. d) Both fenestrated capillaries and sinusoids lack the outer basal lamina of the capillary wall

D

Identify the incorrect statement regarding the fundamental causes of edema. a) Kidney failure leads to water retention and hypertension, thus raising capillary blood pressure and filtration rate. b) Obstruction of lymphatic vessels can interfere with fluid drainage and lead to the accumulation of tissue fluid distal to the obstruction. c) A deficiency of albumin (hypoproteinemia) produces edema by reducing the reabsorption of tissue fluid. d) Since albumin is produced by the liver, liver diseases such as cirrhosis tend to lead to hypoproteinemia and edema. e) Capillary reabsorption does not depend on oncotic pressure.

E

What is(are) the physiological purposes of vasoreflexes? a) To cause a generalized raising or lowering of blood pressure throughout the body b) To selectively modify the perfusion of a particular organ by rerouting blood from one region of the body to another c) To cause widespread vasodilation to raise blood pressure throughout the entire body d) To cause a generalized raising or lowering of blood pressure throughout the body and to cause widespread vasodilation to raise blood pressure throughout the entire body e) To cause a generalized raising or lowering of blood pressure throughout the body and to selectively modify the perfusion of a particular organ by rerouting blood from one region of the body to another

E

Correctly match the statement with whether it would increase or decrease blood flow. dehydration aldosterone hypersecretion increasing blood viscosity increasing vessel radius 1. increase blood flow 2.decrease blood flow

dehydration Correct Response __2__ aldosterone hypersecretion Correct Response __1__ increasing blood viscosity Correct Response __2__ increasing vessel radius __1__

Correctly match the statement with whether it describes compensated shock or decompensated shock. poor cardiac output results in myocardial ischemia and infarction hypotension triggers the production of angiotensin II hypotension triggers the baroreflex life-threatening positive feedback loops occurs 1. compensated shock 2. decompensated shock

poor cardiac output results in myocardial ischemia and infarction Correct Response __2__ hypotension triggers the production of angiotensin II Correct Response __1__ hypotension triggers the baroreflex Correct Response __2__ life-threatening positive feedback loops occurs__1__