Animal Physiology Quizzes Module 2

Animal Physiology Quizzes Module 2 Questions with Complete Solutions (Latest 2025) Which classes of neurons are most likely to repair themselves after damage?

• Afferent neurons
• Efferent neurons
• Interneurons
• A and B
• A, B and C - Correct Answers ✅d. A and B

Assuming normal concentrations of all ions inside and outside of the cell, and that K+ and Cl- channels are blocked but Na+channels are open, the membrane potential will be

________.

• 70 mV
• -60 mV
• + 60 mV
• +30 mV - Correct Answers ✅c. + 60 mV

Suppose that the concentration of K+ inside the cell was 10, and the concentration of K+ outside of the cell was 100 mmol/l. Assuming 37C, the K+ equilibrium potential is

________. 1 / 2

Animal Physiology Quizzes Module 2 Questions with Complete Solutions (Latest 2025)

• -70 mV
• +61 mV
• -61 mV
• -90 mV - Correct Answers ✅b. +61 mV

Blocking the voltage-gated sodium channels will have what effect on the action potential?

• The membrane potential will be more positive than normal

(greater depolarization)

• The membrane will not depolarize (no action potential)
• The membrane will depolarize but not repolarize
• The membrane will hyperpolarize - Correct Answers ✅b.

The membrane will not depolarize (no action potential) A drug that blocked the Na+/K+ ATPase would have what effect on ion concentrations and the membrane potential?

• The ion concentrations across the membrane would

immediately equalize and the membrane potential would go to zero.

• Ion concentrations would slowly equalize, and over time,

the membrane potential would become more negative.

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