3.6.1.2 Receptors - Pacinian Corpuscles

3.6.1.2 Receptors - Pacinian Corpuscles

12th Grade

15 Qs

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3.6.1.2 Receptors - Pacinian Corpuscles

3.6.1.2 Receptors - Pacinian Corpuscles

Assessment

Quiz

Biology

12th Grade

Easy

Created by

Ross Kearns

Used 3+ times

FREE Resource

15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary function of a Pacinian corpuscle?

To detect changes in temperature

To detect mechanical pressure and vibrations

To detect chemical changes

To detect light

Answer explanation

Pacinian corpuscles are specialized mechanoreceptors that primarily detect mechanical pressure and vibrations, making them crucial for sensing changes in touch and texture.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of ion channel is involved in the function of a Pacinian corpuscle?

Voltage-gated calcium channels

Ligand-gated potassium channels

Stretch-mediated sodium ion channels

Proton channels

Answer explanation

Pacinian corpuscles are mechanoreceptors that respond to pressure and vibration. They utilize stretch-mediated sodium ion channels to detect mechanical deformation, making this the correct choice.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when a Pacinian corpuscle is stimulated?

It releases neurotransmitters

It establishes a generator potential

It changes colour

It contracts

Answer explanation

When a Pacinian corpuscle is stimulated, it establishes a generator potential, which is a change in membrane potential that can lead to the generation of an action potential, signaling sensory information.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of a generator potential in a Pacinian corpuscle?

To initiate an action potential

To release hormones

To absorb nutrients

To produce sound

Answer explanation

The generator potential in a Pacinian corpuscle is crucial for converting mechanical stimuli into electrical signals, which then initiate an action potential, allowing the nervous system to respond to pressure and vibration.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes the structure of a Pacinian corpuscle?

A flat disc

A layered onion-like structure

A hollow tube

A spherical ball

Answer explanation

A Pacinian corpuscle is best described as a layered onion-like structure, consisting of concentric layers that respond to pressure and vibration, making it distinct from other shapes like a flat disc, hollow tube, or spherical ball.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What specific type of stimulus does a Pacinian corpuscle respond to?

Chemical stimuli

Light stimuli

Mechanical stimuli

Thermal stimuli

Answer explanation

Pacinian corpuscles are specialized mechanoreceptors that respond specifically to mechanical stimuli, such as pressure and vibration, making 'Mechanical stimuli' the correct choice.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the deformation of the Pacinian corpuscle lead to the opening of ion channels?

By changing the temperature

By stretching the membrane

By altering the pH

By releasing enzymes

Answer explanation

The deformation of the Pacinian corpuscle occurs when pressure is applied, which stretches the membrane. This mechanical stretching leads to the opening of ion channels, allowing ions to flow and generate a nerve signal.

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