Quiz 23: The Transport Systems

In order for cells in multicellular organisms to exchange gases, a circulatory system must be present.

The two large lymphatic ducts deliver lymph to the subclavian veins.

Formation of plaques in atherosclerosis can lead to hypertension, blood clots, stroke, and heart attacks.

When red blood cells are destroyed, the heme molecule is returned to the bone marrow to be used again.

A leak in a blood vessel is closed first by platelets and then by fibrin threads.

Mammal blood serves to transport substances to and from the capillary beds.

One of the functions of blood is to help regulate body temperature.

Which statement is true about the arterial end of a capillary? A) The blood pressure is higher than the osmotic pressure, causing water to leave the bloodstream. B) The blood pressure is lower than the osmotic pressure, causing water to leave the bloodstream. C) The blood pressure is higher than the osmotic pressure, causing water to enter the bloodstream. D) The blood pressure is equal to the osmotic pressure, causing water to leave the bloodstream. E) The blood pressure is equal to the osmotic pressure, causing water to enter the bloodstream.

In an open circulatory system, A) hemolymph enters the heart via ostia. B) blood leaves the heart via venules. C) the heart has two or more chambers. D) nutrients are exchanged across the walls of capillaries. E) blood is pumped into cavities called ventricles.

A four-chambered heart, veins, arteries, and capillaries are found in A) all closed circulatory systems. B) some closed circulatory systems. C) some open circulatory systems. D) all open circulatory systems. E) mammals only.

The pulmonary circuit in a closed circulatory system functions in A) nutrient absorption from the intestine. B) gas exchange in the lungs. C) waste disposal in the kidneys. D) creating proper blood pressure. E) distribution of nutrients to the body tissues.

A major evolutionary change between thefishcirculatory system and the circulatory systemsofamphibians, birds, and mammalians is the presence of a A) separate pulmonary circuit in fish. B) two-chambered heart in amphibians, birds, and mammals. C) double-loop pathway in amphibians, birds, and mammals. D) stronger atria in amphibians, birds, and mammals. E) four-chambered heart in fish.

In animals with four-chambered hearts, the left ventricle A) is larger as it pumps blood to the entire body. B) is larger as it pumps blood in the pulmonary circuit. C) pumps blood to the lungs. D) pumps blood to both the lungs and the body. E) pumps deoxygenated blood.

A heart murmur is caused by A) blocked arteries to the heart muscle. B) loss of oxygen to the left atrium. C) faulty semilunar valves. D) faulty atrioventricular valves. E) an irregular heartbeat.

Which of the following is true about atrioventricular valves? A) One is found at the entrance to the pulmonary trunk. B) Their closing causes the second, shorter "dub" sound of the heartbeat. C) They are also known as the triscupid and bicuspid valves. D) One is found at the entrance to the aorta. E) They are composed of three half-moon shaped flaps.

In the cardiac cycle, diastole is the A) relaxation of heart muscle. B) contraction of the atria. C) closing of the atrioventricular valves. D) opening of the semilunar valves. E) contraction of the ventricles.

If the sinoatrial node fails in the heart, A) the heart ceases to beat. B) the ventricles will beat at a higher rate. C) an artificial pacemaker can correct the problem. D) the heartbeat is unaffected. E) the atria will not contract.

Blood pressure A) is highest when the heart relaxes. B) can decrease because of atherosclerosis. C) can be lowered by the constriction of arterioles. D) is considered high when it is above 100/70 mm Hg. E) contributes to movement of substances from the blood into the tissues.

Which of the following statements is an inacurrate statement regarding the movement of blood through capillary beds? A) Cold temperatures will cause the opening of sphincters to capillary beds in the skin. B) Eating will cause the opening of sphincters to capillary beds in the digestive tract. C) Exercise will cause the opening of sphincters to capillary beds in skeletal muscles. D) When the sphincters leading to a capillary bed are closed, the blood passes through a shunt. E) Red blood cells move through the capillaries in single file.

Blood in veins is A) moved by the contraction of the muscles in the walls of the veins. B) moved away from the heart by skeletal muscle contraction. C) usually high in oxygen. D) moved away from the heart with the help of the valves within the veins. E) moved toward the heart by skeletal muscle contraction.

Pulmonary arteries take A) O ₂-poor blood to the lungs. B) O ₂-rich blood to the lungs. C) O ₂-rich blood to the body. D) O ₂-poor blood to the right atrium. E) O ₂-poor blood to the body.

The vessel that leaves the heart, taking O ₂-rich blood to the body, A) is large in diameter with a thick muscle and elastic layer. B) is called the pulmonary trunk. C) has many valves along its length to assist in blood flow. D) is comprised of a single layer of thin epithelial cells. E) is called the superior vena cava.

If blood is blocked from reaching the heart muscle and it results in chest pain, A) this indicates a heart attack has occurred due to the lack of oxygen to part of the heart muscle. B) it is called angina pectoris. C) this indicates a heart attack has occurred due to a stroke. D) the likely cause is a heart murmur. E) a probable treatment is a blood transfusion.

Taking up fat from digested foods along with excess tissue fluid and returning it to cardiovascular veins is a function of the A) circulatory system. B) systemic circuit. C) lymphatic system. D) pulmonary circuit. E) cardiovascular arteries.

The osmotic pressure and buffering capacity of the blood is maintained by the A) red blood cells. B) plasma. C) lymph. D) white blood cells. E) platelets.

For which of the following is iron required? A) Iron stimulates formation of lymph. B) Iron forms part of hemoglobin, which transports oxygen. C) Iron prevents destruction of red blood cells. D) Iron prevents plaque formation in arteries. E) Iron forms part of white blood cells.

Neutrophils and monocytes are similar in that they both A) are types of erythrocytes. B) result in phagocytized pathogens. C) produce antibodies in response to pathogens. D) release kinins which attract platelets. E) are responsible for specific immunity.

You are a doctor and an individual comes into your office. During the routine exam, you listen to the patient's heart sounds and notice that the first heart sound or "lub" is not as sharp or crisp as it should be. Your diagnosis of the patient's condition is A) atherosclerosis. B) a heart murmur. C) angina pectoris. D) thromboembolism. E) hypertension.

Which of the following is an inaccurate statement about platelets? A) They form clumps in leaks in blood vessels. B) They produce prothrombin activator. C) They contract within a clot. D) They phagocytize pathogens. E) They are actual fragments of a larger type of cell.

The presence of salts and plasma proteins in capillaries causes A) a greater osmotic pressure than blood pressure at the arterial end. B) diffusion of water into the body tissues. C) greater osmotic pressure in the blood than in body tissues. D) slower flow of blood through capillaries. E) water to move out of the blood capillary at the venous end.

Which one of the following statements is true about animals that do not have circulatory systems? A) They do not have tissues and organs. B) They may rely on diffusion for the transfer of gases, nutrients, and wastes. C) There are no animals without circulatory systems. D) They tend to have large bodies. E) The body cells are typically distant from the source of the oxygen, so the gas has to diffuse through several layers to reach all cells.

In the figure shown here, the blood in the chamber indicated by the arrow marked with "X" A) is a mixture of O ₂-poor and O ₂-rich blood. B) is poor in oxygen. C) is rich in oxygen. D) will all be pumped to the lungs. E) will all be pumped to the systemic capillaries of the body.

The advantage of the double-loop circulatory pathway of some vertebrates over the single-loop circulatory pathway of fish is that A) the blood is put back under pressure after picking up oxygen in the respiratory organ. B) all the O ₂-rich blood is pumped to the systemic arteries of the body. C) the O ₂-rich blood and O ₂-poor blood mixes in the single ventricle. D) the ventricle acts as a strong pump. E) the atria act as receiving chambers.

In the figure shown here, the top ECG shown is normal. What condition does the bottom ECG indicate? A) ventricular fibrillation B) a heart murmur C) hypertension D) stroke E) angina pectoris

Which of the following correctly gives the orders of events in a cardiac cycle? A) atria contract, ventricles contract, AV valves close, ventricles relax, semilunar valves close B) ventricles contract, AV valves close, atria contract, ventricles relax, semilunar valves close C) ventricles relax, atria contract, ventricles relax, AV valves close, semilunar valves close D) AV valves close, ventricles relax, atria contract, semilunar valves close, ventricles contract E) ventricles contract, atria contract, AV valves close, ventricles relax, semilunar valves close

Which blood vessel within the systemic circulatory system will connect the digestive tract and the liver? A) hepatic portal vein B) hepatic vein C) pulmonary trunk D) aorta E) renal vein

The blood vessels to the lungs and back are collectively known as the A) pulmonary circulation. B) systemic circulation. C) lymphatic system. D) portal system. E) oxygen exchange system.

The function of the lymphatic system is to A) collect O ₂-rich blood from below the heart and return it to the right atrium. B) carry blood from the heart to the tissues of the body. C) collect tissue fluid and return it to the subclavian veins. D) collect tissue fluid and return it to the aorta. E) collect O ₂-poor blood from above the heart and return it to the right atrium.

Which of the following collects all the venous blood from below the heart? A) pulmonary artery B) renal vein C) hepatic portal vein D) aorta E) inferior vena cava

You are a doctor and a patient comes to you for a checkup. He expresses that his father recently had a heart attack brought on by atherosclerosis. He wants to know what he should do to lower his risk of also having a heart attack. Which of the following statements might you make to him? A) Do not be concerned about your weight. B) Keep exercise to a minimum. C) Decrease the amount of fruits and vegetables in your diet. D) Decrease the amount of saturated fat and cholesterol in your diet. E) Smoking does not contribute to your risk.

Both a coronary bypass operation and a stent insertion procedure are treatments used for which of the following conditions? A) blockage of a coronary artery B) hypertension C) anemia D) heart murmur E) ventricular defibrillation

One of the side effects of chemotherapy is lack of energy due to anemia. Why might erythropoietin be prescribed for a cancer patient undergoing chemotherapy? A) Erythropoietin treats the anemia by stimulating the production of white blood cells. B) Erythropoietin treats the anemia by stimulating the production of red blood cells. C) Erythropoietin prevents the destruction of red blood cells, preventing the anemia. D) Erythropoietin prevents the destruction of white blood cells, preventing the anemia. E) Erythropoietin treats the anemia by stimulating the production of platelets.

Because of the nature of platelets, having a low platelet count can be cause for concern if which of the following were to occur? A) a deep cut B) a bacterial infection C) a viral infection D) a diet deficient in iron E) a parasitic worm infection

A neutrophil is a type of A) white blood cell. B) red blood cell. C) platelet. D) erythrocyte. E) cardiac muscle cell.

A neutrophil A) fights disease. B) forms a plug in damaged blood vessels. C) carries oxygen in the blood. D) releases clotting factors which stimulate the formation of a blood clot. E) carries carbon dioxide in the blood.

Which of the following features are incorrectly matched with the type of blood vessel in which it is found? A) well-developed middle layer with smooth muscle and elastic tissue - arteries B) narrow, microscopic tubes of endothelium - capillaries C) valves are present insuring one-way flow of blood - veins D) thick, well-developed walls due to the presence of a thick layer of smooth muscle - veins E) formed from capillaries and join to form veins - venules

Which of the following statements is correct about the function of the pulmonary circulatory system? A) The pulmonary system is responsible for adding oxygen and removing carbon dioxide from the red blood cells. B) The systemic system is responsible for adding oxygen and removing carbon dioxide from the red blood cells. C) The pulmonary system is responsible for adding carbon dioxide and removing oxygen from the red blood cells. D) The pulmonary system is responsible for adding oxygen and removing carbon dioxide from the white blood cells. E) The pulmonary system is responsible for adding oxygen and removing carbon dioxide from the platelets.

A lower-than-normal level of _____ can result in an increased clotting time. A) platelets B) basophils C) neutrophils D) erythrocytes E) lymphocytes

Which of the following statements is true about the majority of arteries in the body? A) Arteries transport blood toward the heart and contain a thick wall of smooth muscle. B) Arteries transport blood toward the heart and contain a thin wall of smooth muscle. C) Arteries transport blood away from the heart and contain a thick wall of smooth muscle. D) Arteries transport blood away from the heart and contain a thick wall of skeletal muscle. E) Arteries transport blood away from the heart and contain a thick wall of cardiac muscle.

Which organism has an open circulatory system? A) grasshopper B) frog C) eagle D) human E) shark

In organisms that lack a circulatory system, what is the most common method of exchanging nutrients from the external environment to the body? A) diffusion B) osmosis C) absorption D) swallowing them whole E) engulfing them into their stomach

Which substances do not exit the capillary in order to enter the tissue fluid? A) red blood cells B) amino acids C) oxygen D) glucose E) water

Which of the following is a function of blood? A) transport substances B) defend the body against infection C) regulate body temperature D) form clots E) All are functions of blood.

Which substance will always leave the tissue fluid and enter the capillary and eventually leave the body? A) carbon dioxide B) glucose C) oxygen D) amino acids E) water