The text points out that the swim bladders of deep-sea fishes that migrate over large vertical distances are nearly filled with lipids, leaving space for only a small volume of gas, whereas deep-sea fishes that do not make large vertical migrations
have more gas and less lipid in their swim bladders. What is the functional significance of this difference?
Lipids do not expand and contract when the external pressure changes, so a swim bladder with a lot of lipid and a little gas has only a small change in volume as the fishes move up and down. That is good for fishes that migrate over large vertical distances.
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A. Actin B. Troponin C. Tropomyosin D. Sarcomyosin E. No exceptions; all are found in thin filaments
What is the pacemaker that sets the rate of the heartbeat?
A. The AV node B. The Purkinje fibers C. The vagus nerve D. The SA node E. The bundle of His
Match the ganglion cell response to the location of the light stimulus.
1. Light only shines on the center of an off-center visual field. 2. Light only shines on the center of an on-center visual field. 3. Light only shines on the surround of an off-surround visual field. 4. Light only shines on the surround of an on-surround visual field. 5. Diffuse light illuminates both center and surround of on-center cell. 6. Diffuse light illuminates both center and surround of on-surround cell. A. fully excited B. fully inhibited C. weak response
Answer the following statement(s) true (T) or false (F)
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