GBIO 225 WEEK 5 EXAM - 97091

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Exam 1) What tissue lines the digestive tract? (1pts) cartilage muscular connective epithelium 2) Sphincters (1pts) are only found at the beginning of the stomach. are muscles in longitudinal arrangement. prevent movement of material through the digestive tract. are smooth muscles. 3) A bolus is formed in the (1pts) stomach. esophagus. small intestine. mouth. 4) During the process of swallowing, the (1pts) epiglottis closes the trachea leading to the lungs. epiglottis seals the esophagus. esophagus is temporarily closed by the glottis. pharynx restricts food entry to the esophagus. 5) Which of the following functions does the stomach perform the LEAST? (1pts) digestion storage mixing absorption 6) "Heartburn" is caused by (1pts) chymotrypsin sloshing back into the esophagus. pepsin sloshing back into the esophagus. intrinsic factor sloshing back into the esophagus. HCl sloshing back into the esophagus. 7) Of the following parts of the GI tract, the greatest amount of nutrient absorption takes place in the (1pts) small intestine. colon. stomach. pancreas. 8) The main function associated with the structure of villi and microvilli is (1pts) trapping bacteria. secreting digestive enzymes. secreting hormones. increasing surface area. 9) The liver functions to do all of the following EXCEPT (1pts) remove toxins ingested in food. produce bile. produce glucagon. inactivate hormones. 10) The function of segmentation is to (1pts) churn the food and mix the contents with the digestive tract. churn the food and mix the contents with the digestive tract and also bring the contents to the wall of the tract where they could be absorbed. move the food through the digestive tract. produce a wavelike push of the gut contents through the system. 11) Which hormones slow down stomach emptying? (1pts) gastrin and somatostatin leptin and gastrin somatostatin and secretin secretin and cholecystokinin 12) The large intestine begins as the (1pts) duodenum cecum appendix ileum 13) Sodium, potassium, and calcium are referred to as (1pts) acids. bases. nonelectrolytes. electrolytes. 14) An enzyme produced by the kidneys that helps to regulate blood pressure is (1pts) aldosterone. renin. erythropoietin. angiotensin. 15) Most of the filtrate produced at the glomerulus is reabsorbed by the (1pts) peritubular capillary. distal tubules. proximal tubules. loop of Henle. 16) What amount of the fluid removed from the blood is eventually returned to the blood? (1pts) almost 99 percent about 59 percent less than 90 percent a mere 0.9 percent 17) The antidiuretic hormone (1pts) is produced by the anterior pituitary gland. acts on the proximal tubules of nephrons in the kidney. promotes processes that lead to an increase in the volume of urine. promotes processes that lead to a decrease in the volume of urine. 18) If blood pH falls outside of the normal range for too long, which system suffers most? (1pts) skeletal system muscular system central nervous system cardiovascular system 19) Severe vomiting or dehydration and overuse of antacids may bring about which condition? (1pts) respiratory acidosis respiratory alkalosis metabolic alkalosis metabolic acidosis 20) Which hormone causes less sodium and less water to be excreted in the urine? (1pts) ADH aldosterone insulin angiotensin 21) The hormone that controls the concentration of urine is (1pts) glucagon insulin antidiuretic hormone epinephrine 22) Which is the only system that does not contribute to homeostasis? (1pts) reproductive immune digestive urinary 23) Sperm and eggs are referred to as (1pts) gonads. gametes. germ cells. zygotes. 24) The thick layer of smooth muscle in the uterus is the (1pts) endometrium epimetrium myometrium. perimetrium 25) The end of the proliferative phase of the menstrual cycle coincides with (1pts) ovulation. fertilization. menstruation. menopause. 26) What does the oocyte complete prior to ovulation? (1pts) mitosis meiosis II meiosis I cleavage 27) Ovulation is triggered by (1pts) low levels of estrogen. low levels of LH. high levels of chorionic gonadotropin. high levels of LH. 28) Which of the following is the last structure that a sperm travels through as it leaves the body? (1pts) ductus deferens epididymis ureter urethra 29) Sperm production occurs in the (1pts) testes. ductus deferens. epididymis. prostate gland. 30) Spermatogonia develop into (1pts) spermatids. primary spermatocytes. secondary spermatocytes. spermatozoans.
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