1) What tissue lines the digestive tract?
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
4) During the process of swallowing, the
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?
6) "Heartburn" is caused by
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
8) The main function associated with the structure of villi and microvilli is
secreting digestive enzymes.
increasing surface area.
9) The liver functions to do all of the following EXCEPT
remove toxins ingested in food.
10) The function of segmentation is to
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?
gastrin and somatostatin
leptin and gastrin
somatostatin and secretin
secretin and cholecystokinin
12) The large intestine begins as the
13) Sodium, potassium, and calcium are referred to as
14) An enzyme produced by the kidneys that helps to regulate blood pressure is
15) Most of the filtrate produced at the glomerulus is reabsorbed by the
loop of Henle.
16) What amount of the fluid removed from the blood is eventually returned to the blood?
almost 99 percent
about 59 percent
less than 90 percent
a mere 0.9 percent
17) The antidiuretic hormone
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?
central nervous system
19) Severe vomiting or dehydration and overuse of antacids may bring about which condition?
20) Which hormone causes less sodium and less water to be excreted in the urine?
21) The hormone that controls the concentration of urine is
22) Which is the only system that does not contribute to homeostasis?
23) Sperm and eggs are referred to as
24) The thick layer of smooth muscle in the uterus is the
25) The end of the proliferative phase of the menstrual cycle coincides with
26) What does the oocyte complete prior to ovulation?
27) Ovulation is triggered by
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?
29) Sperm production occurs in the
30) Spermatogonia develop into