LAUNCHPAD F/WHAT IS LIFE
4th Edition
ISBN: 9781319231897
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 22, Problem 4MC
Summary Introduction
Introduction:
The smooth muscle surrounding the veins is thinner than that surrounding the arteries.
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Which of the following characteristics is unique to capillaries and not to other blood vessels?
A.
have low blood pressure
B.
have high blood pressure
C.
exchange substances (ions, small molecules and water) between blood and tissues
D.
carry oxygen and carbon dioxide
E.
connect to the heart and lungs
The blood vessels responsible for variably distributing cardiac output among organs in the body are:
a. Veins
b. Arteries
c. Capillaries
d. Arterioles
Which of the following statements is false?a. Only arteries carry oxygenated blood.b. Both arteries and veins have a layer of smooth muscle.c. Capillary beds lie between arteries and veins.d. Sphincters regulate the flow of blood through capillaries.
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- Which of the following is/are involved in regulating blood pressure? a. heart b. baroreceptors c. cardiovascular center in medulla oblongata d. all of the abovearrow_forwardExchange of waste material, oxygen, carbon dioxide, and metabolites such as salts and food molecules takes place in thea. capillaries.b. venules.c. arterioles.d. arteries.arrow_forwardWhich of the following is the best description of what happens in capillaries? A. Capillaries are surrounded by thicker smooth muscle moving blood cells to exchange nutrients and oxygen. B. Capillaries connect minor veins to major veins returning blood to the heart. C. Capillaries are the location where oxygen, carbon dioxide, and nutrients are exchanged with tissues at the cellular level. D. Capillaries are the site where blood mixes with interstitial fluid to allow for gas and nutrient exchange.arrow_forward
- When a person engages in strenuous, prolonged exercise, a. blood flow to the kidneys is reduced.b. cardiac output is reduced.c. total peripheral resistance increases.d. systolic arterial blood pressure is reduced.e. blood flow to the brain is reduced.arrow_forwardThe major source of compliance for maintaining blood pressure during the diastolic interval flow are: A. The Veins. B. The Aorta. C. The Capillaries. D. The Arterioles. E. The Ductus Arteriosus.arrow_forwardDifferentiate the three major blood vessels according to: A. TUNICS B. Blood that flows within each blood vessel (color, viscosity, pH, and specific gravity) C. The method of extraction in each blood vesselarrow_forward
- Which of the following statement/s is/are true about capillaries? A. Precapillary sphincters regulate blood flow into capillary networks based on tissue needs. In less tissues they dilate whereas, in more active tissues they constrict. B. Sinusoids are very permeable capillaries found in the liver, spleen, pituitary gland, and red bone marrow to permit proteins and blood cells to enter or leave the blood. C. Blood pressure in capillaries brings nutrients to tissues and forms tissue fluid in the process of diffusion. (filtration) D. All statements are true. Which of the following statement/s is/are not true regarding phases of cardiac cycle? A. Atrial systole is followed by ventricular systole. B. When the ventricles are in systole, the atria are in diastole. C. The atria continually receive blood from the veins. D. As pressure within the atria increases, the mitral valve is opened. E. All statements are true.arrow_forwardWhich of the following is not a characteristic of a capillary? a. Fenestrated capillaries allow for larger amounts of materials to be exchanged. b. Sinusoid capillaries are the main type of capillary around the brain. c. Capillaries often are arranged in a capillary bed that is supplied by an arteriole. d. The capillary wall consists of an endothelium and a basement membrane only—there is no subendothelial layer.arrow_forwardThe largest cross-sectional area in the total circulation and lowest blood flow velocity is found in: A. The Aorta. B. The capillaries. C. The Vena Cava. D. The small arteries. E. The Pulmonary Vein.arrow_forward
- Which of the following functions pertain(s) to blood?a. Transport oxygen.b. Transport amino acids.c. Form clots to prevent loss.d. Transport heat.e. Deliver water to and take in water from the tissues.arrow_forwardPrimary force driving fluid out of the capillary and into interstitial fluid is: a. Interstitial fluid colloid osmotic pressure (ICOP). b. Interstitial fluid hydrostatic pressure (IHP). c. None of the above. d. Blood colloid osmotic pressure(BCOP). e. Capillary Hydrostatic pressure (CHP).arrow_forwardMark the following statements as true or false. If a statement is false, correct it to make a true statement a. Arteries are the exchange vessels of the cardiovascular system. b. The tunica intima is composed of a sheet of endothelium, connective tissue, and the internal elastic lamina. c. The tunica media consists of smooth muscle cells innervated by vasomotor nerves. d. Muscular arteries control blood flow at the tissue level. e. Veins have smaller lumens, more elastic fibers, and more smooth muscle than arteries.arrow_forward
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The Cardiovascular System: An Overview; Author: Strong Medicine;https://www.youtube.com/watch?v=Wu18mpI_62s;License: Standard youtube license