The muscles of an entropneust (acorn worm) pericardium are responsible for, which of the following processes? Group of answer choices a. Blood flow. b. Coelom fluid circulation. c. Ultrafiltration. d. A & C.
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- In some reptiles, the two layers of dura mater fuse together in the brain. What is a likely consequence of this finding? Group of answer choices a. Because the two layers are fused, it will form a stronger blood-brain barrier. b. Arteries are not able to pass through the two layers, so they must be rerouted around the dura mater. c. With no space between layers, blood cannot be collected here for return to the venous system. d. There will be increased damage to the tissue compared to mammals because in mammals, serous fluid between the layers reduces friction.Many invertebrates utilize the body cavity as a circulatory system. However, in humans, the body cavity plays no role whatsoever in circulation. Why?Which of the following statements about vertebrate circulatory systems is not true? A. In mammals, the blood pressure in the aorta is higher than the pressure in the pulmonary artery. B. In fishes, oxygenated blood from the gills returns directly to the heart through the left atrium. C. In birds, deoxygenated blood leaves the heart through the pulmonary artery. D. In reptiles, the blood in the pulmonary artery has a lower oxygen content than the blood in the aorta. E. In amphibians, deoxygenated blood enters the heart through the right atrium.
- Which of the choices below best describes the systemic circulation of blood?a. The flow of blood into the right atrium and eventually out of the left ventricle.b. The movement of blood from the pulmonary trunk, through capillaries into the pulmonary veins.c. The movement of blood into the coronary arteries, through capillaries into the coronary sinus.d. The movement of blood from the aorta, through arteries and capillaries and then eventually to the vena cavae.Describe the common features that determine whysome invertebrates, such as sponges, cnidarians, andflatworms, do not require a circulatory system.Many objects designed by engineers have “circulatory systems” of one type or another. Describe at least three or four examples. Why do engineers sometimes include systems of flowing fluids in objects they design? We often hear it said that animal systems can teach us how to design engineered systems. If you were a biologist teaching a group of engineers about the lessons of animal circulatory systems, what principles would you emphasize?
- Figure 16.10 Which of the following statements about the circulatory system is false? a. Blood in the pulmonary vein is deoxygenated. b. Blood in the inferior vena cava is deoxygenated. c. Blood in the pulmonary artery is deoxygenated. d. Blood in the aorta is oxygenated.How do arteries differ from veins?a. Arteries have thicker wall layers to accommodate the changes in pressure from the heart.b. Arteries carry blood.c. Arteries have thinner wall layers and valves and move blood by the action of skeletal muscle.d. Arteries are thin walled and are used for gas exchange.explain why even large flatworms from centimeters to meters long can do just fine without the complax circulatory systems seen in other large animals ?
- What do mural cells do? a. Provide the endothelial tubes with structural stability and ability to resist pressures of blood. b. Keep cells together to prevent leakage c. Recruit cancer cells d. Activate the angiogenesis pathway1,What is the purpose of using blood chamber in extracorporeal circuit? 2,Why in extracorporeal circuit blood comes from arterial to be cleaned by dialyzer and back to body through vein? 3,The portal vein brings blood from the intestines to the liver. Which statement is most likely true regarding the portal vein? A. It carries oxygenated blood at low pressure. B. It carries oxygenated blood at high pressure. C. It carries deoxygenated blood at low pressure. D. It carries deoxygenated blood at high pressure.
