TEST BANK R.H. Ettinger Eastern Oregon University Psychopharmacology
4 keer bekeken 0 keer verkocht
Vak
PSYCHOPHARMACOLOGY
Instelling
PSYCHOPHARMACOLOGY
CHAPTER 1 ORGANIZATION AND FUNCTION OF THE NERVOUS SYSTEM
1.1 Multiple Choice
1. The average human brain contains nearly ________ neurons.
a. 10 billion
b. 100 billion
c. 200 billion
d. 1 trillion
Answer: C
Diff: 1 Page Ref: 1
2. The three major classes of neurons are
a. motor, se...
,CHAPTER 1 ORGANIZATION AND FUNCTION OF THE NERVOUS SYSTEM
1.1 Multiple Choice
1. The average human brain contains nearly ________ neurons.
a. 10 billion
b. 100 billion
c. 200 billion
d. 1 trillion
Answer: C
Diff: 1 Page Ref: 1
2. The three major classes of neurons are
a. motor, sensory, and interneurons.
b. efferent, afferent, and glia.
c. motor, efferent, and afferent.
d. glia, interneurons, and motor.
Answer: A
Diff: 1 Page Ref: 1
3. The nucleus of a neuron resides within the
a. terminal button.
b. axon.
c. cell body.
d. dendrites.
Answer: C
Diff: 1 Page Ref: 2
4. The axon hillock is located
a. at a cell’s terminal button.
b. at gaps in a cell’s myelin.
c. where the axon leaves the cell body.
d. where dendrites connect to the cell body.
Answer: C
Diff: 1 Page Ref: 3
5. Myelin serves to
a. increase the speed of conduction along the axon.
b. insulate a cell’s axon from the electrical activity of adjacent axons.
c. synthesize and store neurotransmitter substances.
d. Both a and b are correct
Answer: D
Diff: 2 Page Ref: 3
6. Neurotransmitters are stored and released from a cell’s
a. terminal button.
b. node of Ranvier.
c. cell body.
d. axon hillock.
Answer: A
Diff: 1 Page Ref: 3
,7. The pressures acting on charged ions include ________ and ________ pressures.
a. hydrostatic; electrostatic
b. diffusion; hydrostatic
c. diffusion; electrostatic
d. diffusion; glucostatic
Answer: C
Diff: 2 Page Ref: 5
8. A neuron’s resting membrane potential is caused by
a. sodium ions.
b. a disequilibrium of positive and negatively charged ions inside and outside the axon.
c. a high concentration of sodium inside the cell.
d. potassium ions.
Answer: B
Diff: 1 Page Ref: 5
9. The resting membrane potential has a charge of about ________ millivolts.
a. 0
b. +100
c. –70
d. –55
Answer: C
Diff: 1 Page Ref: 6
10. The resting membrane potential is maintained because
a. potassium ions cannot cross through the cell membrane to the outside.
b. sodium ions cannot cross to the inside of the cell membrane.
c. there is no pressure acting on sodium ions.
d. there is no pressure acting on potassium ions.
Answer: B
Diff: 2 Page Ref: 7
11. Potassium is said to be at equilibrium during a resting potential because
a. electrostatic pressure forcing it in equals the diffusion pressure forcing it out.
b. diffusion pressure forcing it in equals the electrostatic pressure forcing it out.
c. hydrostatic pressure forcing it in equals the electrostatic pressure forcing it out.
d. it is equally concentrated inside and outside the cell.
Answer: A
Diff: 2 Page Ref: 7
12. Changes in the voltage of a cell that vary depending on the strength of stimulation are referred to as
a. action potentials.
b. depolarization.
c. hyperpolarization.
d. graded potentials.
Answer: D
Diff: 2 Page Ref: 7
, 13. When an axon is depolarized to approximately ________ millivolts, an action potential is initiated.
a. –55
b. –70
c. 0
d. +30
Answer: A
Diff: 1 Page Ref: 7
14. Ion channels for sodium ions open when the membrane is ________ to about ________ millivolts.
a. depolarized; –55
b. polarized; –70
c. charged; +30
d. depolarized; 0
Answer: A
Diff: 1 Page Ref: 7
15. The initiation of an action potential is a consequence of an ________ of ________ ions.
a. influx; potassium
b. efflux; chlorine
c. influx; sodium
d. All of the above are correct
Answer: C
Diff: 1 Page Ref: 7
16. During an action potential, the membrane voltage changes from ________ to about ________
millivolts on the inside relative to the outside.
a. –70; 0
b. 0; +50
c. –70; +30
d. –70; +55
Answer: C
Diff: 1 Page Ref: 7
17. Local anesthetics such as lidocaine work by
a. preventing the release of neurotransmitters signaling pain messages.
b. blocking sodium channels so an action potential cannot occur.
c. preventing cells from receiving signals from pain-transmitting neurons.
d. blocking receptor sites for pain-signaling neurotransmitters.
Answer: B
Diff: 2 Page Ref: 8
18. An action potential is initiated at a cell’s
a. dendrites.
b. axon hillock.
c. terminal button.
d. node of Ranvier.
Answer: B
Diff: 1 Page Ref: 8
Voordelen van het kopen van samenvattingen bij Stuvia op een rij:
Verzekerd van kwaliteit door reviews
Stuvia-klanten hebben meer dan 700.000 samenvattingen beoordeeld. Zo weet je zeker dat je de beste documenten koopt!
Snel en makkelijk kopen
Je betaalt supersnel en eenmalig met iDeal, creditcard of Stuvia-tegoed voor de samenvatting. Zonder lidmaatschap.
Focus op de essentie
Samenvattingen worden geschreven voor en door anderen. Daarom zijn de samenvattingen altijd betrouwbaar en actueel. Zo kom je snel tot de kern!
Veelgestelde vragen
Wat krijg ik als ik dit document koop?
Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.
Tevredenheidsgarantie: hoe werkt dat?
Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.
Van wie koop ik deze samenvatting?
Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper THEEXCELLENCELIBRARY. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor €28,68. Je zit daarna nergens aan vast.
