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