Chapter 15B Flashcards
5) Which organ group receives the most blood at rest?
5) Livers and digestive tracts
6) Which group receive the least blood at rest?
6) Heart
7) What would happen to each of these numbers during vigorous exercise?
7) muscle, heart (increase)
Digestive (decrease)
8) Where is the lowest pressure in the CV system?
8) Superior and inferior vena cava
9) How is the slow down of blood in capillaries beneficial?
9) more time for diffusion
11) Where do lymphatic ducts return liquids to CV system?
11) Large veins above the heart
12) What are the functions of the lymphatic valves?
12) To prevent back flow (Low pressure).
14) What structures regulate the distribution of blood flow into and through organs
14) Precapillary sphincters
15) The amount of blood reaching the muscles and digestive organs is highly variable T/F
15) T
16) Where in the body does the blood move most slowly (lowest velocity)?
16) Capillaries.
17) Besides velocity, what drop (lowers) in the capillaries?
17) Hydrostatic pressure, velocity, oxygenation
18) The mass movement of fluid between the blood and interstitial fluid is called;
18) Bulk flow.
19)Bulk flow is due to (caused by);
19) Due to hydrostatic or osmotic pressure gradients.
20) When bulk flow moves fluid into the capillaries it is called;
20) Absorption.
21) When bulk flow moves fluid out of the capillaries, it is called;
21) Filtration.
22) Large plasma proteins move out of capillaries and into the interstitial fluid as part of the bulk flow T/F
22) F
23) What materials tend to move out of the blood and into most body tissues?
23) Water, Oxygen, and Glucose.
24) In what areas will oxygen move into the blood?
24) Lungs
25) In what areas will glucose and other food molecules move into the blood?
25) Gi tract.
26) What materials tend to move into the blood from most body tissues?
26) CO2, nitrogenous wastes.
27) In what areas will carbon dioxide move out of the blood?
27) Lungs
28) In what areas will nitrogenous wastes move out of the blood?
28) Kidneys
29) Net filtration minus net absorption equals what?
29) Net out flow.
30) Approximately how much lymphatic fluid is collected by the lymphatic capillarities?
30) 2L a day.*
31) In what two ways are lymphatic vessels more like veins than arteries?
31) Values and thin walls
32) Lymphatic fluid is essentially the same as interstitial fluid T/F
32) T.*
33) One of the most important functions of the lymph nodes is to;
33) Filtering the blood to initiate a immune responds
34) How is pumping of lymphatic fluid accomplished?
34) Due to smooth muscle contractions in larger lymphatic vessels and to valves.
35) Elephantiasis is a form of edema T/F
35) T.
36) What reflex automatically changes blood pressure?
36) Baroreceptor reflex.
37) How do kidneys help regulate blood pressure?
37) By changing blood volume (reabsorption of water from filtrate).
38) What cardiovascular disease accounts for the majority of CV deaths each year?
38) Coronary heart (artery) disease.
