The countercurrent exchange system for gills relies on diffusion to diffuseoxygen into the blood. This system works because the blood in the gills.a. increasingencounters [Select] b. decreasingwater as the blood moves from [Select]a. arteries[Select] b. capillariesc. Veins✰ concentrations of oxygen in thea.arteriesb. capillaries toC. veinsthrough the capillaries. This also ensures thata. lessblood always has [Select] b. morec. the same amount ofoxygen than the water forcontinued diffusion.

The blood encounters decreasing concentrations of oxygen in the water. (b)The blood moves from…

Answered: The countercurrent exchange system for…

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter35: Respiration

Section: Chapter Questions

Problem 3SA: Countercurrent flow of water and blood increases the efficiency of gas exchange in ______. a. fishes...

See similar textbooks

Similar questions

Which of these is a true statement?a. In lung capillaries, carbon dioxide combines with water toproduce carbonic acid.b. In tissue capillaries, carbonic acid breaks down to carbondioxide and water.c. In lung capillaries, carbonic acid breaks down to carbondioxide and water.d. In tissue capillaries, carbonic acid combines with hydrogenions to form the carbonate ion.e. All of these statements are true.
Sympathetic impulses to the smooth muscles in the walls of arteries and arterioles produceA. Vasodilation only C. Vasomotor inhibitionB. Vasodilation and vasoconstriction D. Arteriosclerosis Substances exchanged at the capillary level move through the capillary walls byA. Diffusion B. Filtration C. Osmosis D. Active transport In the measurement of blood pressure, the cuff of the sphygmomanometer usually surroundsA. The radial artery C. The brachiocephalic arteryB. The dorsalis pedis artery D. The brachial artery Arterial blood pressure is independent ofA. Blood Volume B. Heart rate C. Blood Viscosity D. Influx of calcium ions Identify the TRUE statement (s). There may be several correct answers,A. An increased cardiac output is reflected in an elevated diastolic pressure.B. An increased cardiac output is reflected in a decreased diastolic pressure.C. An increase in the force of contraction produces an elevated…
Which of the following are true? A. Peripheral Chemo receptors for O2 in H+ ions are found in the carotid and aortic bodies. B. Peripheral chemoreceptors for O2 and H+ ions are found only in the carotid body. C. Peripheral chemoreceptors for O2 and H+ ions are found only in the aortic body. D. O2 and CO2 are monitored in the medulla Choose the correct answer
Oxygen attaches to a(n) ______ ion in hemoglobin.a. calciumb. sodiumc. irond. potassium
шеa neat TosS evaporation is compromised first. OTrue False QUESTION 13 With each beat, the heart pumps: d. blood rich in oxygen to the lungs and blood rich in carbon dioxide to the body. b. OD. blood rich in carbon dioxide to the lungs and blood rich in oxygen to the body. C. blood rich in carbon dioxide to the lungs and back to the heart. d. blood rich in oxygen to the lungs and then back to the heart. QUESTION 14 Click Save and Submit to save and submit Click Saue All Ancugno to nau
What happens when the skeletal muscle cells in the legs are not passing enough CO2 to his arterioles during and after exercise. a. tissues are reciving more glucose b. muscle tissue is producing too much nitric acid c. arterioles are not sufficiently vasconstricting d. arterioles are not sufficiently vasodilating
Oxygen content of venous blood is measured in several vascular beds. Venous blood from which of the following organs most likely has the lowest content during rest? A. Brain B. Heart C . Kidney. D Lung. E. Skeletal muscle
If the partial pressure of O2 in the plasma islow, how will that affect the movement of O2? ● A. O2 will unload from hemoglobin. ● B. O2 will be converted to HbO2. ● C. O2 will load onto hemoglobin. ● D. O2 will stay bound to hemoglobin and only leave if the red blood cell islocated in a capillary.
If partial pressure of oxygen were about 35 MMHG and the capillaries then a. the cells would not need extra oxygen b. CO2 pressure would be very low in the cells c. it would not be able to diffuse into the tissue cells d. it would easily travel and capillaries and if used to the needy cells
Which of the following is incorrect about pulmonary circulation? A. Pulmonary perfusion can increase during exercise with increasing the workload of right ventri. B.High distensiblity of pulmonary capillaries allow increase blood flow C. Pulmonary circulation operates at a low pressure of 15mm Hg on average D. None of the above is Incorrect ..
Which of the following scenariosare correct?Select all that apply A. High levels of PCO2will cause loading of O2ontohemoglobin. B. An increase in pH will causeO2to unload from hemoglobin. C. High PO2levels will increase saturation of Hb with O2. D. An increase in bodytemperature will cause O2to unload from hemoglobin.
The enzyme carbonic anhydrase a. causes the blood to be more basic in the tissues. b. forms carbonic acid in the blood. c. actively transports carbon dioxide out of capillaries. d. is active only at high altitudes. e. All of these are correct

SEE MORE QUESTIONS

Recommended textbooks for you

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

Biology

ISBN:

9781305967359

Author:

STARR

Publisher:

CENGAGE L

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

Biology

ISBN:

9781305967359

Author:

STARR

Publisher:

CENGAGE L

SEE MORE TEXTBOOKS