The systemic circuit of mammals______ . a. carries blood to the lungs and back b. is shorter than the pulmonary circuit c. carries blood to body tissues and back d. allows oxygenated and oxygen-poor blood to mix
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The systemic circuit of mammals______ .
a. carries blood to the lungs and back
b. is shorter than the pulmonary circuit
c. carries blood to body tissues and back
d. allows oxygenated and oxygen-poor blood to mix
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- 38. All blood cells are produced in the A. red bone marrow. B. yellow bone marrow. C. white bone marrow. ____ 39. The heart muscle itself receives its blood supply from the A. coronary artery. B. aorta. C. inferior vena cava. ____ 40. The parasympathetic and sympathetic nervous systems A. work identically on different areas of the body. B. may be antagonistic in their actions. C. are always subject to conscious control.Which of the following is true of the circulatory system of a grasshopper? A. One or more muscular chamber hearts drive blood through the closed circulatory system of the grasshopper. B. The grasshopper has an open circulatory system with a heart that is a peristaltic vessel. C. Because the grasshopper has an open circulatory system, the maximum hemolymph pressures that can be achieved are relatively low, which limits the maximum metabolic rate that can be achieved. D. The grasshopper does not have a specialized circulatory system - instead, its circulatory system consists of the fluid in the body cavity which is circulated by means of the body movements of the animal. E. Both B and C are true of the circulatory system of the grasshopper.The blood vascular system in annelids: A. A closed and the blood pigment is hemocyanin B. Open and the blood pigment is haemoglobin C. Closed vascular system and the blood pigment is haemoglobin* D. Open vascular system and blood circulates in the haemocoel. E. None of the above
- 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 following statements is correct? a. Arteries carry blood away from the heart and veins carry blood to the heart. b. Arteries carry blood to the heart and veins carry blood away from the heart. C. All arteries carry oxygen-rich blood and veins carry oxygen-poor blood. d. Arteries carry oxygen-poor blood and veins carry oxygen-rich blood.8)After blood is “used” by cells, in other words they’ve taken the oxygen, where does it go? Select one: a. Back to the lungs for more oxygen b. Back to the heart and then on to the lungs for more oxygen c. Back to the heart to return to the body for more oxygen d. Back to the capillary beds for more oxygen e. Back to the brain, where the oxygen level is monitored
- The respiratory protein hemocyanin_____ . a. contains iron b. occurs only in vertebrates c. transports oxygen in some invertebrates d. colors hemolymph redOrganisms with circulating body fluid that is separate from the fluid surrounding the body cells have a/an A. Closed circulatory system B. Gastrovascular cavity C. Open circulatory system D. Heart and blood vesselsA rhythmic beating of cardiac muscle in a mammalian heart is initiated by the _____. A.Atrioventricular node B.Parasympathetic nervous system C.Purkinje fibers D.Sinoatrial node
- Marine mammals are able to hold their breath for extended periods underwater because a. unlike humans, they don’t hypoventilate. b. partial pressure of carbon dioxide does not increase underwater. c. myoglobin in muscle tissue provides an oxygen reserve. d. the brains of marine mammals do not have receptors that respond to impulses initiated in the aortic and carotid bodies.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.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.