View the step-by-step solution to:

NPB 101 Sa mple Final Multiple Choice Identify the letter of the choice that best co mpletes the s tatement or ans wers the question. ____ 1. Select...

1. Select the incorrectstatement regarding the plasma membrane.
a. selectively controls movement of molecules between the ECF and the ICF.
b. isthe barrier thatsurroundsthe blood vessels and separatesthe blood plasma from the
interstitial fluid.
c. contains proteinsthat provide membrane functions.
d. has cholesterol to maintain rigidity.
e. serves as a mechanical barrier to hold in the contents of the cell.
____ 2. The concentration gradient for Na
+
a. favorsits movement into the cell at resting potential.
b. favorsits movement out of the cell at resting potential.
c. is maintained by the Na
+
-K
+
pump.
d. Both (a) and (c) above.
e. Both (b) and (c) above.
____ 3. Which of the following isresponsible for the falling phase of an action potential?
a. Na
+
-K
+
pump restoring the ionsto their original locations.
b. ATP-ase destroying the energy supply that was maintaining the action potential at its peak.
c. closing of K
+
channels.
d. greatly increased permeability to Na
+
e. None of these answers.
____ 4. The universal energy currency in cellsis
a. glucose.
b. insulin.
c. glycogen.
d. myosin.
e. ATP.
____ 5. Select the correctstatement about diffusion.
a. the chemical gradient of a substance does not affect itsinitial rate of net diffusion.
b. it depends on random (thermal) motion of molecules.
c. during diffusion, there is a net movement of molecules from an area of lower
concentration to an area higher concentration.
d. itsrate increases asthe temperature decreases.
e. at equilibrium there is no movement of molecules.
____ 6. Extrusion of materialsto the exterior of the cell through the plasma membrane is called
a. pinocytosis
b. endocytosis
c. exocytosis
d. phagocytosis
e. All of these answers.____ 7. The two systems concerned with the control of body functioning are
a. endocrine and lymphatic.
b. nervous and respiratory.
c. nervous and endocrine.
d. circulatory and endocrine.
e. endocrine and respiratory.
____ 8. The blind spot
a. isthe point on the retina at which the optic nerve leaves and blood vessels passthrough.
b. containsrods and cones.
c. isin the exact center of the retina.
d. Both (a) and (b) above.
e. All of these answers.
____ 9. Sequence the following events correctly.
1. an excitatory postsynaptic potential (EPSP) occurs.
2. calcium induces exocytosis of neurotransmitter.
3. action potential invades presynaptic terminal.
4. neurotransmitter is packed into synaptic vesicles.
5. neurotransmitter bindsto receptor on chemically-gated channel.
a. 1, 4, 5, 2, 3
b. 4, 3, 1, 5, 2
c. 2, 1, 5, 4, 3
d. 4, 3, 2, 5, 1
e. 3, 4, 2, 5, 1
____ 10. Language ability is usually associated with the
a. right cerebral hemisphere.
b. limbic system.
c. prefrontal association cortex.
d. left cerebral hemisphere.
e. hypothalamus.
____ 11. Multiple Sclerosis causes demyelination of neurons. It is
a. associated with a loss of dopaminergic cellsin the basal ganglia.
b. characterized by an intention (action) tremor.
c. characterized by a resting tremor.
d. Both (a) and (b) above.
e. Both (a) and (c) above.
____ 12. High- and low-frequency sounds are discriminated chiefly by
a. low frequenciessetting up fluid vibrationsin the perilymph and high frequenciessetting
up vibrationsin the endolymph.
b. the middle ear bones vibrating more vigorously for low frequencies.
c. low frequencies producing stronger eardrum vibrations.
d. the location along the basilar membrane that is deflected by them.
e. high frequencies producing larger action potentials.____ 13. Which of the following are common means by which binding of an extracellular chemical messenger with a
cell’sreceptor brings about a desired intracellular response?
a. opening or closing of specific channelsto regulate ionic movement acrossthe plasma
membrane.
b. activation of an intracellular second messengersystem.
c. alteration of protein shape and function as a result of phosphorylation.
d. Only (a) and (b) above.
e. All of these answers.
____ 14. Which of the following statements concerning negative feedback isincorrect?
a. negative feedback exists when the input to a system increasesthe output and the output
limitsits own production by inhibiting the input.
b. with negative feedback, a controlsystem’sinput and output continue to enhance each
other.
c. negative feedback exists when a change in a regulated variable triggers a response that
opposesthe change.
d. most of the body’s homeostatic control mechanisms operate on the principle of negative
feedback.
e. None of the above statementsisincorrect.
____ 15. Which of the following changesin banding pattern occur during muscle contraction?
a. the A band getsshorter.
b. the I band getsshorter.
c. the H zone getsshorter.
d. both the I band and the H zone getshorter.
e. None of these answers.
____ 16. An action potential rapidly spreadsto the central portions of a skeletal muscle cell by means of the
a. Z lines.
b. sarcoplasmic reticulum.
c. H zone.
d. poresin the membrane surface.
e. T tubules.
____ 17. Cross bridge interaction between actin and myosin in skeletal muscle is directly blocked by
a. acetylcholine.
b. calmodulin.
c. Z lines.
d. calcium.
e. tropomyosin.
____ 18. During prolonged aerobic exercise, what isthe primary means by which ATP is produced for contractile
activity?
a. creatine phosphate.
b. fermentation.
c. oxidative phosphorylation.
d. glycolysis.
e. myoglobin.____ 19. Which valve(s) prevent the backflow of blood from the right ventricle to the right atrium?
a. tricuspid.
b. mitral.
c. bicuspid.
d. Both (b) and (c) above.
e. None of these answers.
____ 20. In cardiac contractile cells, the plateau of the action potential resultsfrom the opening of voltage-gated
__________ channelsin the plasma membrane of the cardiac cell.
a. sodium
b. potassium
c. calcium
d. chloride
e. glucose
____ 21. The direction of the impulse through the conduction system of the heart for each cardiac cycle is normally
a. AV node--SA node--bundle of His--Purkinje fibers.
b. AV node--bundle of His--SA node--Purkinje fibers.
c. bundle of His--AV node--Purkinje fibers--SA node.
d. SA node--AV node--bundle of His--Purkinje fibers.
e. SA node--bundle of His--Purkinje fibers--AV node.
____ 22. The volume of blood ejected from each ventricle during a contraction is called the
a. end-diastolic volume.
b. end-systolic volume.
c. stroke volume.
d. cardiac output.
e. cardiac reserve.
____ 23. The first heartsound is produced by
a. atrial contraction.
b. opening of the AV valves.
c. closing of the AV valves.
d. closing of the semilunar valves.
e. opening of the semilunar valves.
____ 24. Which of the following isthe correct relationship between pressure, flow, and resistance?
a. flow = pressure gradient
radius
4
b. flow × pressure gradient = resistance
c. flow = pressure gradient
resistance
d. pressure gradient = flow
resistance
e. resistance = flow
radius
4____ 25 Which statement regarding sympathetic stimulation effects on blood pressure isincorrect?
a. vasoconstriction of arteriolesincreasestotal peripheral resistance.
b. decreased end diastolic volume increases cardiac output.
c. increased stroke volume increases cardiac output.
d. vasoconstriction of veinsincreases venousreturn
e. vasoconstriction of veinsincreasesstroke volume.
____ 26. The inspiratory musclesinclude the
a. diaphragm and internal intercostal muscles.
b. diaphragm and external intercostal muscles.
c. diaphragm and abdominal muscles.
d. internal and external intercostal muscles.
e. None of these answers.
____ 27. Which of the following statements concerning pulmonary surfactant isincorrect?
a. pulmonary surfactant issecreted by Type II alveolar cells.
b. pulmonary surfactant is deficient in newborn respiratory distresssyndrome.
c. pulmonary surfactant promotes elastic recoil of the lungs.
d. pulmonary surfactant reducessurface tension.
e. none of the above.
____ 28. Hemoglobin hasthe greatest affinity for
a. carbon dioxide.
b. oxygen.
c. carbon monoxide.
d. nitrogen.
e. sulfur dioxide.
____ 29. Which of the following forces oppose glomerular filtration in the kidney?
a. blood colloid-osmotic pressure.
b. Bowman's capsule hydrostatic pressure.
c. glomerular-capillary blood pressure.
d. Both (a) and (b) above.
e. Both (b) and (c) above.
____ 30. Stimulation of the macula densa cellsin the kidney
a. resultsin vasodilation of the afferent arteriole.
b. resultsin vasoconstriction of the afferent arteriole.
c. increases GFR.
d. Both (a) and (c) above.
e. Both (b) and (c) above.
____ 31. When blood volume becomes abnormally low
a. sodium reabsorption is diminished.
b. dilute urine isformed.
c. renin catalyzesthe conversion of angiotensinogen.
d. aldosterone issecreted by the kidney.
e. Two of these answers.____ 32. Atrial natriuretic peptide
a. issecreted by the heart when atrial pressure is high.
b. resultsin an increased glomerular filtration rate.
c. inhibits aldosterone activity.
d. Both (a) and (b) above.
e. (a), (b), and (c) above.
____ 33. Proteins are primarily digested to and absorbed as
a. amino acids.
b. cellulose.
c. fatty acids and glycerol.
d. monosaccharides.
e. vitamins.
____ 34. Bile
a. aidsfat digestion through their detergent action.
b. aidsfat absorption through micelle formation.
c. is almost entirely reabsorbed following secretion into the large intestine.
d. Both (a) and (b) above.
e. (a), (b), and (c) above.
____ 35. The pyloric gland area of the stomach antrum secretes
a. histamine.
b. gastrin.
c. intrinsic factor.
d. Both (a) and (b) above.
e. Both (a) and (c) above.
____ 36. Select the incorrectstatement about the pancreas.
a. it has endocrine tissue.
b. it has exocrine tissue.
c. itsecretes an alkaline fluid.
d. itsecretes pepsinogen.
e. itsecretestrypsinogen.
____ 37. Select the hormone that is an importantsatiety signal.
a. ADH.
b. leptin.
c. glucagon.
d. glucose.
e. TSH.
____ 38. Too little activity of a particular hormone can arise from
a. an inborn lack of target-cell receptorsfor this hormone.
b. excess production of this hormone’stropic hormone.
c. failure of the primary gland that producesthe hormone.
d. Both (a) and (c) above.
e. Both (b) and (c) above.____ 39. The gonads
a. consist of a pair of testesin males and ovariesin females.
b. produce gametes and secrete sex hormones.
c. refer to the externally visible genitalia in both sexes.
d. Both (a) and (b) above.
e. All of these answers.
____ 40. Lipophilic hormones
a. include steroids and thyroid hormone.
b. bind with receptorslocated inside their target cells.
c. activate second-messenger systems within their target cells.
d. Both (a) and (b) above.
e. All of these answers.
____ 41. During the absorptive (fed)state
a. fats are the primary energy source.
b. glucose sparing occurs.
c. glycogenolysisis occurring.
d. glucose isthe main energy source.
e. amino acid degradation is occurring.
____ 42. The acrosome of the spermatozoon
a. contains microtubulesthatslide past each other to provide the sperm with motility.
b. contains mitochondria for energy production.
c. is a fructose-filled vesicle that provides energy for the spermatozoa.
d. contains enzymesthat enable the sperm to penetrate the ovum.
e. containsthe sperm's genetic information.
____ 43. During the luteal phase of the ovarian cycle
a. estrogen gradually rises and then peaksjust prior to ovulation.
b. progesterone levelsreach their maximum concentration.
c. the uterine lining is not optimal for implantation.
d. Both (a) and (b) above.
e. Both (b) and (c) above.
____ 44. Which of the following statements concerning hormonesisincorrect?
a. a single target cell may be influenced by more than one hormone.
b. a single hormone can influence only one type of target cell.
c. a single endocrine gland may produce multiple hormones.
d. an endocrine organ may exert nonendocrine functionsin addition to secreting hormones.
e. They are typically secreted into the blood.
____ 45. The normalsite of fertilization isthe
a. vagina.
b. uterus.
c. oviduct.
d. fimbria.
e. ovary.____ 46. Hypophysiotropic hormonesfrom the hypothalamus
a. control the release of oxytocin and vasopressin from the posterior pituitary.
b. are carried in the hypothalamo-hypophyseal portalsystem.
c. always act to stimulate the release of anterior pituitary hormones.
d. are released upon positive-feedback stimulation via the anterior pituitary tropic hormones.
e. travel via neuron axonsfrom the hypothalamusto the anterior pituitary.
____ 47. Oxytocin
a. is a potent uterine muscle stimulant.
b. isinvolved in a positive feedback cycle during parturition (labor and delivery).
c. acts on receptorsthat are induced by high estrogen levels occurring late in pregnancy.
d. Both (a) and (c) above.
e. All of these answers.
____ 48. Which of the following statements concerning sex determination and sex differentiation is correct?
a. An XX combination ofsex chromosomesis a genetic female.
b. The secretion of testosterone by the fetal gonadsinducesthe development of male external
genitalia and reproductive tract.
c. The secretion of estrogen by the fetal gonadsinducesthe development of female external
genitalia and reproductive tract.
d. Both (a) and (b) above.
e. All of these answers.
____ 49. Hyperthyroidism can be due to all of the following except
a. lack of iodine.
b. too much thyrotropin-releasing hormone (TRH).
c. too much thyroid-stimulating hormone (TSH).
d. too much T4 or T3.
e. thyroid-stimulating immunoglobulin.
____ 50. Ovulation occurs with peak concentrations of _________ secreted into the blood.
a. FSH
b. prostaglandins
c. estrogen
d. LH
e. progesterone
NPB 101 Sample Final Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. Select the incorrect statement regarding the plasma membrane. a. selectively controls movement of molecules between the ECF and the ICF. b. is the barrier that surrounds the blood vessels and separates the blood plasma from the interstitial fluid. c. contains proteins that provide membrane functions. d. has cholesterol to maintain rigidity. e. serves as a mechanical barrier to hold in the contents of the cell. ____ 2. The concentration gradient for Na + a. favors its movement into the cell at resting potential. b. favors its movement out of the cell at resting potential. c. is maintained by the Na + -K + pump. d. Both (a) and (c) above. e. Both (b) and (c) above. ____ 3. Which of the following is responsible for the falling phase of an action potential? a. Na + -K + pump restoring the ions to their original locations. b. ATP-ase destroying the energy supply that was maintaining the action potential at its peak. c. closing of K + channels. d. greatly increased permeability to Na + e. None of these answers. ____ 4. The universal energy currency in cells is a. glucose. b. insulin. c. glycogen. d. myosin. e. ATP. ____ 5. Select the correct statement about diffusion. a. the chemical gradient of a substance does not affect its initial rate of net diffusion. b. it depends on random (thermal) motion of molecules. c. during diffusion, there is a net movement of molecules from an area of lower concentration to an area higher concentration. d. its rate increases as the temperature decreases. e. at equilibrium there is no movement of molecules. ____ 6. Extrusion of materials to the exterior of the cell through the plasma membrane is called a. pinocytosis b. endocytosis c. exocytosis d. phagocytosis e. All of these answers.
Background image of page 1
____ 7. The two systems concerned with the control of body functioning are a. endocrine and lymphatic. b. nervous and respiratory. c. nervous and endocrine. d. circulatory and endocrine. e. endocrine and respiratory. ____ 8. The blind spot a. is the point on the retina at which the optic nerve leaves and blood vessels pass through. b. contains rods and cones. c. is in the exact center of the retina. d. Both (a) and (b) above. e. All of these answers. ____ 9. Sequence the following events correctly. 1. an excitatory postsynaptic potential (EPSP) occurs. 2. calcium induces exocytosis of neurotransmitter. 3. action potential invades presynaptic terminal. 4. neurotransmitter is packed into synaptic vesicles. 5. neurotransmitter binds to receptor on chemically-gated channel. a. 1, 4, 5, 2, 3 b. 4, 3, 1, 5, 2 c. 2, 1, 5, 4, 3 d. 4, 3, 2, 5, 1 e. 3, 4, 2, 5, 1 ____ 10. Language ability is usually associated with the a. right cerebral hemisphere. b. limbic system. c. prefrontal association cortex. d. left cerebral hemisphere. e. hypothalamus. ____ 11. Multiple Sclerosis causes demyelination of neurons. It is a. associated with a loss of dopaminergic cells in the basal ganglia. b. characterized by an intention (action) tremor. c. characterized by a resting tremor. d. Both (a) and (b) above. e. Both (a) and (c) above. ____ 12. High- and low-frequency sounds are discriminated chiefly by a. low frequencies setting up fluid vibrations in the perilymph and high frequencies setting up vibrations in the endolymph. b. the middle ear bones vibrating more vigorously for low frequencies. c. low frequencies producing stronger eardrum vibrations. d. the location along the basilar membrane that is deflected by them. e. high frequencies producing larger action potentials.
Background image of page 2
Show entire document

Recently Asked Questions

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

-

Educational Resources
  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question