_____ 1. Which of the following is not a characteristic of a capillary?
- a. Fenestrated capillaries have pores that allow for relatively large materials to slip out of the capillary.
- 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 basement membrane only—there is no subendothelial layer.
Introduction:
Capillary is very small and narrow tubules whose wall is made up of only endothelium, which consist a single layer of epithelial cells. This helps in the easy movement of fluid through them. The movement of the interstitial fluid from the blood to the tissues is due to the high blood pressure at the arterial end. The high osmotic pressures at the venous end of the capillaries enable the movement of fluid into the blood.
Answer to Problem 1DYKB
Correct answer:
Sinusoid capillaries are the main type of capillary around the brain is not a characteristic of capillary.
Therefore, option (b) is correct.
Explanation of Solution
Reasons for the correct statements:
Option (b) is given as “Sinusoid capillaries are the main type of capillary around the brain”. Sinusoid capillaries does not found near the brain. The sinusoid capillaries found in the red bone marrow, liver, spleen and some endocrine gland. Hence, sinusoid capillary found near the brain is not a correct characteristic of a capillary.
Hence, option (b) is correct.
Reasons for the incorrect statements:
Option (a), is given as “Fenestrated capillaries have pores that allow for relatively large materials to slip out of the capillary”.
Fenestrated capillaries are permeable and are used to filter, release and absorbed large material or proteins. Hence, is incorrect.
Option (c), is given as “Capillaries often are arranged in a capillary bed that is supplied by an arteriole”.
Capillaries form a capillary bed which is a network of capillaries between an artery and a vein and is present in every region of the body. Hence, it is incorrect.
Option (d), is given as “The capillaries wall consists of an endothelium and basement membrane only-there is no subendothelial layer”.
Capillary is very small and narrow tubules whose wall are made up of only endothelium and basement membrane, which consist a single layer of epithelial cells. Hence, it is incorrect.
Hence, options (a), (c), and (d) are incorrect.
Sinusoid capillaries are found in the red bone marrow, liver, spleen, and some endocrine gland, but they do not found near the brain.
Want to see more full solutions like this?
Chapter 20 Solutions
ANATOMY & PHYSIOLOGY LL W/CONNECT ACCESS
- The Right Subclavian artery is a: A. Visceral branch of the aorta B. Parietal branch of the aorta C. Not a branch of the aorta D. Terminal branch of the aortaarrow_forwardArteries differ from veins in their thicker ____ and ____. a. squamous epithelium . . . outer layer b. endothelium . . . connections to precapillary sphincters c. smooth muscle . . . one-way valves d. outer connective tissue . . . smooth musclearrow_forwardWhich 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_forward
- Mark 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_forwardWhich of the following conditions might result in the back flow of blood through a weakened mitral valve? Group of answer choices a. High pressure in the left ventricle, low pressure in the left atrium b. High pressure in the left atrium, low pressure in the left ventricle c. High pressure in the right ventricle, low pressure in the right atrium d. High pressure in the right atrium, low pressure in the right ventriclearrow_forwardOf those listed, which is the largest non-aortic vessel generally used in infant arterial injection? A. Carotid B. Subclavian C. External Iliac D. Femoralarrow_forward
- The Lumbar artery is a: A. Visceral branch of the aorta B. Parietal branch of the aorta C. Not a branch of the aorta D. Terminal branch of the aortaarrow_forwardThe Common Iliac artery is a: A. Visceral branch of the aorta B. Parietal branch of the aorta C. Not a branch of the aorta D. Terminal branch of the aortaarrow_forwardMark ALL the statements about capillaries that are TRUE. Select one or more: a. Towards the venule end of the capillary, the blood pressure is higher than the osmotic pressure. b. Fluid will leave the capillaries when the osmotic pressure exceeds the blood pressure. c. Capillaries are only one cell layer thick so the blood moves through them at low velocity. d. Capillaries have a total cross-sectional area that is greater than any other class of vessels. e. The blood pressure will decrease as the blood flows through the capillaries from the arterioles.arrow_forward
- The Esophageal artery is a: A. Branch of the ascending aorta B. Branch of the abdominal aorta C. Branch of the arch of the aorta D. Branch of the thoracic aortaarrow_forwardWhich of the following connects vessels through vascular anastomoses? a. precapillary sphincters c. collaterals b. capillary beds d. postcapillary venulesarrow_forwardWhich of the following can be included in the description of an artery? A. Remains open when incised B. Solid structure C. Generally some blood present D. Silvery white colorarrow_forward
- Medical Terminology for Health Professions, Spira...Health & NutritionISBN:9781305634350Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. SchroederPublisher:Cengage Learning