Sample Lecture Exam #4

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P215 – Basic Mammalian Physiology
Summer 2003
Lecture Exam #4
NAME
I recommend that you mark answers on the exam form first, then fill out the answer sheet when you have
completed the exam. Fill out your answer sheets carefully and avoid erasing answers. You will have the
entire class period to complete this exam. Good luck!
A. “Either/Or” Questions (2 points each, 28 points total). Select the correct term of the two provided to
make the statement true, and mark the corresponding letter (a or b) on your answer sheet.
1. As fluid moves down the descending limb of the loop of Henle, its osmotic concentration (a. increases
/ b. decreases).
2. Ovulation is triggered by a surge of (a. FSH / b. LH) near the end of the follicular phase of the ovarian
cycle.
3. The peripheral chemoreceptors are more sensitive to (a. O2 / b. CO2) level in the blood.
4. Testosterone is produced by the (a. Leydig / b. Sertoli) cells of the testes
5. The (a. afferent arteriole / b. efferent arteriole) leads blood out of the glomerulus to the peritubular
capillaries.
6. As PO2 increases, the percentage of oxyhemoglobin saturation in the blood (a. increases / b.
decreases).
7. Pancreatic juice tends to be (a. alkaline / b. acidic) in pH.
8. Newly absorbed carbohydrates are transported out of the small intestine by the (a. cardiovascular / b.
lymphatic) system.
9. An ova (a. has / b. has not) completed its second meiotic division at the time it is released into the
female reproductive tract.
10. Blood pH tends to (a. increase / b. decrease) with elevated blood PCO2.
11. (a. ADH / b. Aldosterone) increases the permeability of the collecting duct walls to water, thus
increasing water reabsorption.
12. A fertilized egg is typically in the (a. zygote / b. blastocyst) stage when implantation occurs.
13. 2,3 DPG tends to promote oxygen (a. loading onto/ b. unloading from) hemoglobin
14. Prostaglandins are produced by the (a. seminal vesicles / b. prostate gland) in the male reproductive
system.
B. Multiple choice questions. Choose the best answer (3 points each, 72 points total).
15. Which of the following conditions would promote O2 loading by hemoglobin?
a) decreased PO2
b) increased pH
c) both
d) neither
16. Which of the following segments of the nephron is involved in the process of filtration?
a) glomerulus
b) proximal convoluted tubules
c) distal convoluted tubules
d) collecting duct
17. Which of the following is an expiratory muscle?
a) diaphragm
b) external intercostals
c) both are expiratory muscles
d) neither are expiratory muscles
18. The protective layer of mucus that covers the gastric mucosa is produced by…
a) goblet cells
b) chief cells
c) parietal cells
d) little elves that live in a tree
19. The osmotic gradients needed to produce hyperosmotic urine are generated by the …
a) distal tubule
b) glomerulus
c) collecting duct
d) loop of Henle
of digestive tract organs contains blood and lymph vessels that carry newly
20. The
absorbed nutrients into circulation.
a) mucosa
b) submucosa
c) muscularis
d) serosa
21. Alkalosis is a state where the pH of the blood is…
a) above 7.0
b) above 7.45
22.
c) below 7.0
d) below 7.35
is a hypothalamal hormone that regulates the release of gonadotropins from the anterior
pituitary gland.
a) estrogen
b) LH
c) GnRH
d) oxytocin
of a mature spermatozoan contains enzymes needed to penetrate the zona
23. The
pellucida of an egg cell.
a) head
b) acrosome
c) midpiece
d) tail
24. Most of the absorption of nutrients occurs in the …
a) stomach
b) pancreas
c) large intestine
d) small intestine
of the ovarian cycle
25. Progesterone is secreted at high levels during the
a) menustrual phase
b) proliferative phase
26. The
spermatozoa.
c) follicular phase
d) luteal phase.
is a structure located on the posterior surface of each testes that stores mature
a) epididymis
b) seminal vesicle
c) vas deferens
d) prostate gland
27. The thecal cells of an ovarian follicle produce
a) estrogen
b) progesterone
.
c) human chorionic gonadotropin
d) testosterone
28. The central chemoreceptors of the medulla oblongata ultimately respond to changes in
concentration in the blood plasma.
a) O2
b) CO2
c) H+
d) HCO3-
29. Glucose is reabsorbed out of the lumen of the kidney tubules through…
a) osmosis
b) primary active transport
c) cotransport
d) simple diffusion
30. The increase in estrogen that induces the onset of labor is ultimately caused by the production of
androgens by the…
a) placenta
b) mother’s ovaries
c) mother’s adrenal glands
d) fetus’ adrenal glands
31. Erythrocytes are able to convert H2O and CO2 into H2CO3 at much higher rates than would normal
within them.
due to the presence of the enzyme
a) carbonic anhydrase
b) ptyalin
32.
c) enterokinase
d) alkaline phosphatase
, which are amphipathic molecules derived from cholesterol that are produced by the
liver, are used to emulsify fat in the small intestine, thus aiding in fat digestion
a) chylomicrons
b) lacteals
c) micelles
d) bile salts
33. During inspiration, intrapulmonary pressure is
a) less than
b) greater than
atmospheric pressure.
c) equal to
d) the opposite of
34. The
during pregnancy.
is an organ that allows exchange of materials between fetal and maternal blood
a) placenta
b) amniotic sac
c) corpus luteum
d) chorion
35. Which of the following is the primary female sex organ, producing both gametes and steroid
hormones?
a) clitoris
b) ovary
c) uterus
d) vagina
36. According to
proportional to its volume.
a) Bohr’s Law
b) Beer’s Law
, the pressure exerted by a given amount of a gas is inversely
c) Boyle’s Law
d) Buttafuco’s Law
37. Roughly
of all the CO2 transported in the blood is transported in the form of dissolved
CO2 gas in the blood plasma
a) 1%
b) 70%
c) 20-23%
d) 7-10%
38. Secretion and reabsorption occur between the filtrate in the kidney tubules and the blood in the…
a) glomerulus
b) afferent arterioles
c) efferent arterioles
d) peritubular capillaries
WOO-HOO! You’re done!
Make sure your answer sheet is filled out completely!
Thanks for such a fun summer!
P215 Basic Human Physiology
Summer 2003
Lecture Exam #4 Answers
Question Answer
Question Answer
1
A
20
B
2
B
21
B
3
B
22
C
4
A
23
B
5
B
24
D
6
A
25
D
7
A
26
A
8
A
27
D
9
B
28
B
10
B
29
C
11
A
30
D
12
B
31
A
13
B
32
D
14
A
33
A
15
B
34
A
16
A
35
B
17
D
36
C
18
A
37
D
19
D
38
D