Anatomy & Physiology
5th Edition
ISBN: 9780321861580
Author: Marieb, Elaine N.
Publisher: Pearson College Div
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Chapter 19, Problem 3RQ
Entry of lymph into the lymphatic capillaries is promoted by which of the following? (a) one-way minivalves formed by overlapping endothelial cells, (b) the respiratory pump, (c) the skeletal muscle pump, (d) greater fluid pressure in the interstitial space.
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The germinal centers in lymph nodes are sites of (a) the lymph sinuses, (b) proliferating B lymphocytes, (c) T lymphocytes, (d) a and c, (e) all of the above.
(a) Which anatomical characteristic ensures that the flow of lymph through a lymph node is slow? (b) Why is this desirable?
(a)
The lymphatic system is a part of the circulatory system and a vital part of the immune
system. It is a network of tubes throughout the body that drains fluid (called lymph)
from tissues and empties it back into the bloodstream.
(i)
Give a brief explanation why the lymphatic system is a one-way system,
whereas the blood vascular system is a two-way system.
(ii)
Point out TWO (2) type of infections that may cause the lymph nodes to swell.
Chapter 19 Solutions
Anatomy & Physiology
Ch. 19 - What is lymph? Where does it come from?Ch. 19 - Name two lymphatic ducts and indicate the body...Ch. 19 - What is the driving force for lymph movement?Ch. 19 - Prob. 4CYUCh. 19 - What is the benefit of having fewer efferent than...Ch. 19 - Prob. 6CYUCh. 19 - List several functions of the spleenCh. 19 - Lymphatic vessels (a) serve as sites for immune...Ch. 19 - Prob. 2RQCh. 19 - Entry of lymph into the lymphatic capillaries is...
Ch. 19 - The structural framework of lymphoid organs is (a)...Ch. 19 - Lymph nodes are densely clustered in all of the...Ch. 19 - The germinal centers in lymph nodes are largely...Ch. 19 - Prob. 7RQCh. 19 - The lymphoid organ that functions primarily during...Ch. 19 - Collections of lymphoid tissue (MALT) that guard...Ch. 19 - Prob. 10RQCh. 19 - Prob. 11RQCh. 19 - (a) Which anatomical characteristics ensures that...Ch. 19 - There are no lymphatic arteries. Why isnt this a...Ch. 19 - Prob. 1CCSCh. 19 - Prob. 2CCSCh. 19 - Prob. 3CCSCh. 19 - Prob. 4CCS
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- ** SELECT ALL THAT APPLY Y^ ** Which of the following mechanisms help maintain lymph flow? a) pulsation lymphatic capillaries b) breathing d) capillary smooth muscle contraction e) valves in lymph vessel wallsarrow_forwardWhat is the driving force for lymph movement?arrow_forward1. (a)Where would you expect to find most of the plasma cells in a lymph node? (b)And What kinds of cells are in the cords of the Red Pulp?arrow_forward
- Identify the incorrect statment about lymphatic system (A) Lymphatic capillaries have valves to ensure unidirctional flow (B) 72% of total blood fluid leaks out and needs to be returened each day (C) lymph is filtered at the lymph nodes (D) heutrophils are the main phagocyte found in lymph nodesarrow_forward(a)Define formed elements and list their three major categories. (b) Which is least numerous?(c ) Which comprise(s) the buffy coat in a hematocrit tube?arrow_forward(a) Describe the steps of erythrocyte formation in the bone marrow.(b) What name is given to the immature type of red blood cell that is newly released into the circulation?arrow_forward
- Erythropoietin directly stimulates RBC formation by, (a) increasing rates of mitotic divisions in erythroblasts. (b) speeding up the maturation of red blood cells. (c) accelerating the rate of hemoglobin synthesis. (d) a, b, and c are correct.arrow_forward(a) Define hemostasis. (b) List the three major phases of coagulation. Explain what initiates each phase and what the phase accomplishes. (c) In what general way do the intrinsic and extrinsic mechanisms of clotting differ? (d) Which ion is essential to virtually all stages of coagulation?arrow_forwardThrombocytopenia is a disorder in which blood shows an abnormally low concentration of (a) platelets, (b) erythrocytes, (c) granulocytes, (d) agranulocytes.arrow_forward
- Where does this fluid (lymph) go once it enters the lymphatic vessels? What makes it flow?arrow_forwardWhich of the following lymphoid organs have a cortex and a medulla? (More than one choice is correct.) (a) lymph nodes, (b) spleen, (c) thymus, (d) aggregated lymphoid nodules, (e) tonsils.arrow_forwardWhat are the forces that help to move the lymph along ?arrow_forward
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