Exam_III_practice_questions

Exam_III_practice_questions - Lili Wang Biol118 EXAM III...

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Lili Wang Biol118 EXAM III Practice Problem 1. In the mammalian gut, proteins first begin to be enzymatically digested in the… a. Mouth b. Esophagus c. Stomach d. Small intestine e. Large intestine 2. Most of the enzymes in the small intestine come from the a. Intestinal wall b. Liver c. Pancreas d. Stomach 3. Among other things, the pancreas secretes copious amounts of a. Bile b. Bicarbonate c. Pepsin d. Secretin 4. The principal function of bile salts is to… a. Digest proteins b. Emulsify proteins c. Digest carbohydrates d. Break down fatty acids e. Emulsify fats 5. The principal action taking place in the large intestine (=colon) is… 6. Essential amino acids are defined as those amino acids which…
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7. When blood sugar levels fall, the pancrease secretes into blood to induce liver cells to break down glycogen into glucose and release glucose in the blood. The hormone has the opposite effect. a. Insulin, pepsin b. Insulin, glucagon c. Glucagon, insulin d. Pepsin, glucagon 8. Which of the following environments has the least amount of dissolved oxygen per liter of fluid? a. Air on top of Mt. Everest b. Air at seal level c. Warm, still seawater d. Pepsin, glucagon 9. Which of the following is not true of insect respirations? a. Their cells obtain oxygen directly from a system of air-filled tubes called tracheae b. They contain tracheal tubes which provide oxygen to the blood, which th en circulates and carries oxygen to the cells c. Air enters the insect thru a set of openings in the sides of the thorax and abdomen d. Diffusion along (without ventilation) can provide enough oxygen for insects to survive 10. The muscles most important in mammalian respiration are the… a. Diaphragm muscles b. Intrinsic muscles of lungs c. Intercostals muscles of the ribs 11. The ratio between the volume of air you inhale at rest ( tidal volume) and the maximum volume you would use during vigorous exercise (vital capacity) is about a. 1:1 b. 1:2 c. 1:5
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d. 1:10 e. 1:50 12. When respiratory control center in the medulla induces higher breathing rates during exercise, it is responding mainly to… 13. Some plasma leaks out o the capillaries when blood reaches a capillary bed; this fluid is collected in the… 14. Which of the following circulation pathways is correct for the mammalian heart?
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Exam_III_practice_questions - Lili Wang Biol118 EXAM III...

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