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- Countercurrent flow of water and blood increases the efficiency of gas exchange in ______. a. fishes c. birds b. amphibians d. all of the aboveHow do the lungs and the heart work together? The lungs supply the oxygen through theblood that passes to the heart while the heart pumps ___________.A. deoxygenated blood throughout the bodyB. deoxygenated blood towards the lungs for oxygenationC. oxygenated blood throughout the bodyD. oxygenated blood throughout the body and pumps back deoxygenatedblood towards the lungs for oxygenationHow does a frog ventilate its lungs? Contrast an amphibian’s positive-pressure breathing with a mammal’s negative-pressure breathing.
- Compare the two types of gas exchange systems in invertebrates. Based on your observation of the tracheal system of an aquatic insect: mosquito wriggler) & book lung systems (in invertebrates: spider (Araneae), explain how these systems are similar and how they differ from one another. (i.e. structures involved & relation to circulatory system). In cockroach, do the spiracles occur in pairs? What do you think happens if you block oxygen from coming into the body and prevent carbon dioxide from leaving?Which of the following is NOT a feature of a gas-exchange organ in animals? A. low surface area for gas exchange B. moist C. thin, delicate structure D. extensive blood flowIn this figure I have blacked out the gases exchanged in the lung (top) and at the tissues (bottom). Which numbers on the black boxes correspond to oxygen? 1 and 2 1 and 3 1 and 4 3 and 4
- Gas exchange is more difficult for aquatic animals with gills than for terrestrial animals with lungs because CHECK ALL THAT WOULD APPLY water contains much more O2 per unit volume than air gills allow water to flow in one direction. water contains much less O2 per unit volume than air gills have less surface area than lungs. water is denser than airWhich of the following increases an individual’s cardiac output?1. Epinephrine2. Hypovolemia3. Mechanical ventilation4. HyperthermiaA. 1 onlyB. 2 onlyC. 3 onlyD. 1 and 4 onlyWhich of the following statements best summarizes the function of the pulmonary circuit in a human circulatory system? Question 26 options: Filters waste products from the blood. Transports carbon dioxide to the lungs and picks up oxygen from the lungs. Transports oxygen through the heart, lungs and body tissues. Transports oxygen and nutrients to body tissues.
- Where is the actual exchange of oxygen and carbon dioxide take place?* a. Veins b. Artery c. Capillaries 2. What type of blood vessels that contain valves to ensure blood flows in only one direction?* a. Veins b. Capillaries c. Artery What type of blood vessel that carry oxygenated blood away from the heart and also contain a strong, muscular middle layer that helps pump blood through the body? a. Capillaries b. Veins c. ArteryWhich of the following respiratory systems is notclosely associated with a blood supply?(A) the lungs of a vertebrate(B) the gills of a fish(C) the tracheal system of an insect(D) the skin of an earthwormDescribe structural and functional differences between gills and lungs (ie. know the anatomy of lungs and gills). Why are birds’ lungs more efficient at removing O2 from the air compared with mammalian lungs?
