NPB 101 Midterm 3 Spring 2011

NPB 101 Midterm 3 Spring 2011 - Name TRY L T MGU‘fE‘J...

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Unformatted text preview: Name: TRY, L T MGU‘fE‘J ID: A NPB 101 Midterm 3 (Spring 2011) Multiple Choice Identifi) the choice that best completes the statement or answers the question. I. If 20% of the air is composed of 02, the partial pressure of Oxygen at an altitude of 20,000 feet where atmospheric pressure is 350 mm Hg is '9 70mmHg ) -. 20mmHg g; e :_ 0. 351111an ~2— 3‘ d. 700mIan e. 350mmI-Ig 2. Which of the following statements concerning puhnonaty surfactant is M? a. It reduces surface tension. \IM if h“) i) I 09/ Cb) It reduces the cohesive force between water molecules. [ . It is secreted by Type II alveolar cells. d. It promotes elastic recoil of the lungs. e. It is deficient in newborn respiratory distress syndrome. _ 3. The inspiratory mgsflesinclude the @ diaphragm and external intercostal muscles internal and external intercostal muscles 0. diaphragm and abdominal muscles d. diaphragmand internal intercostal muscles e. none of these / 4. Which hormone below targets osteoclasts when blood calcium levels are too low, thus causing an increase in the concentration of calcium in the blood? a. cortisol b. aldosterone c. calcitonin dz thyroid hormone @ parathyroid honnone 5. At the end of a normal expiration, when outward air flow has ceaseda a. Intrapleural pressumter than ultra-alveolar pressure. Inna-alveolar pressure is less than atmospheric pressure. @ Inna-alveolar pressure is equal to atmospheric pressure. . Intrapleural pressure is greater than atmospheric pressure. e. Inna-alveolar pressure is greater than atmospheric pressure. 6. . percent of the energy found in nutrient molecules is lost as heat. 10 f @25/ .75 7. Hormone secretion fiom the anterior pituifly gland is controlled / a. by hormones from the hypothalamus b. directly by neural innervation of anterior pituitary cells / c. by negative-feedback action of target-tissue hormones @ both a and c . both b and c 8. The major chemical digestive activity occurring in the stomach is a. digestion of vitamins @ digestion of fat / c. digestion of protein d. digestion of starch e. absorption of monosaccharides 9. In diabetes mellitus: * a. Too much glucose is being lost in the urine, resulting in abnormally low blood glucose levels. b. Too much glucose is transferred into the brain cells by an insulin excess. no. The brain cells do not receive an adequate supply of glucose, leading to symptoms of decreased CNS activity. "fr @ both a and c 6. none of these 10. Chymotrypsinogen a. once activated, is involved in protein digestion b. is activated by enterokinase c. is secreted by the endocrine pancreas @ all of these e. none of these 11. The energy equivalent of oxygen is the . oxygen consumption required for the processing and storage of ingested foodstuff b. value that equates how much energy is liberated from food for every liter of oxygen consumed . number of calories contained in every liter of oxygen consumed d. energy required to raise 1 g of H20 1°C .___ e. none of these 12. Which of the following is not a component of saliva? a. water amylase /e./ mucus 13. In the process of negative feedback: a. TRH inhibits TSH secretion by the anterior pituitary. Thyroid hormone inhibits TSH secretion by the anterior pituitary. c yroid hormone and TRH inhibit TSH secretion by the anterior pituitary. . Thyroid hormone directly inhibits further thyroid hormone secretion by the thyroid gland. TSH inhibits thyroid hormone secretion by the thyroid gland. ID:A lD:A 14. The lungs are held against the thoracic wall due to a. cohesiveness of the pleural fluids ,) / b. the negative intrapleural pressure /,) c. the positive intrapulmonary pressure / d. both a and c " (-1., 6; all of these " 15. Of the hormones secreted by the adrenal gland, those that promote an increase in the blood glucose level ‘.____.__—.———-—- include a. cortisol b. epinephrine c. aldosterone @ aldosteroneand epinephrine e. cortisol and epinephrine 16. The small intestinal digestive enzymes a. are secreted into the lumen, where they perform their fimction . act intracellularly within the brush borders . complete the digestion of carbohydrates . /d./ bothaandc /e: bothbandc 17. The effective plasma concentration of a hormone is normally regglated by appropriate adjustments in the hormone's a. rate of excretion b. rate of secretion c. extent of binding to plasma proteins d. rate of binding with target-cell receptors e. rate of metabolic inactivation 18. The intrinsic nerve plexuses ,a/ are comprised exclusively of neurons that release acetylcholine b. are located in the duodenum of the small intestine ““ coordinate local activity in the digestive tract both b and c e. none of these 19. Which of the following represent long-loop negative feedback in the CRH-ACTH-cortisol system? CRH inhibits cortisol secretion. a. b. Cortisol inhibits CRH secretion. E) ACTH inhibits cortisol secretion. d. CRH inhibits ACTH secretion. e. ACTH inhibits CRH secretion. 20. When animals including humans are chronically deprived of all light/dark cues they a. continue to exhibit photoentrainment due to specialized receptors localized to the eye b. go into ‘fiee run’, revealing the period of their endogenous generator c. often exhibit a slightly longer cycle length for their circadian rhythms / both a andb both b and c 21. - The defecation reflex Va. \/ Z G a can be overridden by voluntary contraction of the external anal Sphincter ~——— involves contraction of the sigmoid colon and rectum involves relaxation of the internal anal sphincter ,. is initiated when mass movements force fecal material into the rectum, stimulating stretch receptors in the rectal wall—J all of these 22. Bile salts / i . aid fat digestion by emulsifying fat b. aid fat absorption through micelle formation é are made in the gall bladder We A d both a and b c. all of these 23. Which statement is incorrect? /a/ The same hormone may be secreted by more than one endocrine gland. 3“ D‘ ‘1 M A single hormone can influence only one type of target cell. .2 A single target cell may be influenced by more than one hormone. "\9 i d. An endocrine organ may exert non—endocrine functions in addition to secreting hormones. /e./ A single endocrine gland may produce multiple hormones. 24. Which of the following isnotshared by both lipophilic and hydrophilic hormones? transport via plasma proteins regulation of metabolic reactions amplification of hormone actions in a cell initiation of second messenger systems / transport via plasma proteins and initiation of second messenger systems 25 . Identify the comLSLatemenKs). Hemoglobin bufl‘ers against changes in pH due to resPiratory carbonic acid. Hemoglobin can combine withgg, 902, H", and CD. IN- \u The presence of hemoglobin keeps the blood P 02 low and favors 02 movement into the blood until hemoglobin is completely saturated. «\ (le Hemoglobin unloads more 02 in the presence of increased tissue acidity. JV (t “i ' All of these. 26. Gashin acts to a. b. Q d. e. stimulate parietal and chief cells to produce acidic gastric juices inhibit the ileocecal sphincter to allow it to open trigger haustral contractions both a and b all of these 1]):A 27. The brain region that provides putpuLto the respiratory muscles is located in the a. cerebral cortex b. . . angaefium ORV (HUI / Whit} c William d. medulla ’3 e. hypothalamus 28. Which of the following is nota cause o_f_h_yp_othyroidism? Grave‘s disease . iodine-deficient diet / c. lack of TRH )1/ lack of an enzyme necessary for one of the steps in the synthesis and release of thyroid hormone / c. all of these 29. The pharyngoesoBhageal sphincter is normally closed to prevent a. vomiting b. esophageal secretions from leaking into the stomach c. air from entering the esophagus during breathing food from entering the pharynx "" e. gastric contents fiom refluxing back into the esophagus 30. The satiety center is located in the _ of the brain. a. cerebrum b. cerebellum c. hypothalamus d. e. thalamus _ medulla ...
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