Neural Signaling

Question 1

Sensory neurons activated by external stimuli produce?

Answer 1

Receptor Potential

Question 2

What potential does a neuronal membrane at rest possess?

Answer 2

-40 to -90mv

Question 3

Action potential occurs when the membrane reaches?

Answer 3

Threshold Potential

Question 4

What happens when the membrane potential turns more negative than Resting Potential?

Answer 4

Hyperpolarization

Question 5

What is the most important property of action potential?

Answer 5

All or none phenomena

Question 6

Why are axons myelinated?

Answer 6

For faster transmission (booster system) and avoid leakage of current.

Question 7

What are the two major types of synaptic transmission?

Answer 7

Electrical and Chemical

Question 8

What are the two properties of neuronal membranes that facilitate electrical potential across it?

Answer 8

1. Differences in the ion concentrations inside and outside the membrane
2. Selective permeability in the form of ion channels

Question 9

What can be measured by Nernst Equation?

Answer 9

Equilibrium Potential

Question 10

When does the Goldman equation become equivalent to Nernst Equation?

Answer 10

When the neural membrane is permeable to only one particular ion.