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nerve physiology formative assessment

Authored by Saima Zareen

Other

12th Grade

Used 1+ times

nerve physiology formative assessment
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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the principal ion responsible for generating the resting membrane potential in neurons?

Calcium

Sodium

Potassium

Chloride

Magnesium

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The Nernst potential for an ion depends on which of the following?

The membrane thickness

Temperature and ion concentration gradient

Resting potential

Number of ion channels

Enzyme concentration

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The Goldman equation is used to determine:

The resting membrane potential when the membrane is permeable to only one ion

The action potential threshold

The diffusion rate of gases

The membrane potential when multiple ions are involved

Osmotic pressure of a solution

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which ion channel opens first during the depolarization phase of an action potential?

Potassium voltage-gated channel

Calcium leak channel

Sodium voltage-gated channel

Chloride channel

Non-specific cation channel

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What causes repolarization during an action potential?

Activation of calcium channels

Opening of sodium channels

Opening of potassium channels and efflux of K⁺

Closing of chloride channels

Influx of potassium

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Saltatory conduction occurs only in:

Smooth muscles

Unmyelinated nerves

Myelinated nerves

Skeletal muscles

Cardiac atrial tissue

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The threshold potential is the level of membrane potential at which:

The sodium-potassium pump activates

All potassium channels close

Voltage-gated sodium channels open explosively

Calcium channels start calcium-induced calcium release

There is maximum hyperpolarization

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