11.Depolarization would occur if: A. sodium cations leave the cell B. potassium
ID: 9010 • Letter: 1
Question
11.Depolarization would occur if:A. sodium cations leave the cell
B. potassium cations leave the cell
C. chloride anions enter the cell
D. calcium cations enter the cell
12. Evan wants to get his sister Lauren’s attention. He taps her shoulder softly at first, and then progressively harder. With each successive hit, action potentials in Lauren’s neurons get
A. larger in magnitude
B. smaller in magnitude
C.more frequent
D. less frequent
13. Graded potentials:
A. always depolarize the cell
B. always hyperpolarize the cell
C. are always identical
D. can be added together
14. Nodes of Ranvier are important because they are
A. transfer points between presynaptic and postsynaptic cells
B. the naked points on the axon between myelinated spaces where action potentials travel
C. a form of enzyme-linked receptor
D. a form of agonist
15. Electrical synapses convey signals between cells via
A. gap junctions
B. desmosomes
C. nodes of Ranvier
D. tight junctions
True/False
16. Ligands travel through ion channels to induce a cellular response.
17. Paracrine signals travel through the bloodstream to act on nearby cells
18. Hydrophilic cell molecules utilize intracellular receptors to deliver their message to the cell.
19. In living human cells, there is a higher concentration of potassium in intracellular fluid than in extracellular fluid.
20. Sodium can pass through the cell membrane only by means of the sodium/potassium pump
Explanation / Answer
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11.Depolarization would occur if:
A. sodium cations leave the cell
B. potassium cations leave the cell
C. chloride anions enter the cell
D. calcium cations enter the cell
12. Evan wants to get his sister Lauren’s attention. He taps her shoulder softly at first, and then progressively harder. With each successive hit, action potentials in Lauren’s neurons get
A. larger in magnitude
B. smaller in magnitude
C. more frequent
D. less frequent
13. Graded potentials:
A. always depolarize the cell
B. always hyperpolarize the cell
C. are always identical
D. can be added together
14. Nodes of Ranvier are important because they are
A. transfer points between presynaptic and postsynaptic cells
B. the naked points on the axon between myelinated spaces where action potentials travel
C. a form of enzyme-linked receptor
D. a form of agonist
15. Electrical synapses convey signals between cells via
A. gap junctions
B. desmosomes
C. nodes of Ranvier
D. tight junctions
True/False
16. Ligands travel through ion channels to induce a cellular response. False
17. Paracrine signals travel through the bloodstream to act on nearby cells False
18. Hydrophilic cell molecules utilize intracellular receptors to deliver their message to the cell. True
19. In living human cells, there is a higher concentration of potassium in intracellular fluid than in extracellular fluid. True
20. Sodium can pass through the cell membrane only by means of the sodium/potassium pump False
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