Physiology II: Somatosensory System 1 - Primary Sensory Neurones and their Modalities

Question 1 of 13

1

The Somatosensory System can be subdivided into 3 parts:
❌: Registers cutaneous sensation by numerous receptors
❌: Monitors posture and movement via receptors in muscles, tendons and joints
❌: Reports upon the internal state of the body

Select option below to complete the highlighted text

Enteroceptive Division

Proprioceptive Division

Exteroceptive Division

Explanation

Question 2 of 13

1

Fill the blank spaces to complete the text.

Resting membrane potential is mV, whereras the resting potential of a neuron is mV.

Explanation

Question 3 of 13

1

Fill the blank space to complete the text.

A is a receptor that responds to potentially damaging stimuli by sending 'threat' signals to the brain

Explanation

Question 4 of 13

1

❌ mediate cold, cool, indifferent, warm and hot sensations
❌ respond to extreme degrees of heat (both hot and cold)
❌ responds to potentially damaging substances in tissue

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Low threshold thermoreceptors

Thermal nociceptors

Chemical nociceptors

Low threshold chemical receptors

Explanation

Question 5 of 13

1

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Cutaneous afferent fibres in the fingertips are of a ( high, low ) density of innervation, each fibre having a ( small, large ) receptive field in order to allow a ( high, low ) acuity in terms of sensation.

Explanation

Question 6 of 13

1

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Two point discrimination (spacial acuity) in higher in the ( finger tip, forearm ) but lower in the ( forearm, finger tip ), due to the differing sizes of the afferent fibres' receptive fields.

Explanation

Question 7 of 13

1

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As receptive field size increases, spatial acuity ( decreases, increases ).

Explanation

Question 8 of 13

1

Which layer of the epidermis contains merkel cells?

Select one of the following:

Basal layer
Keratin layer
Granular layer
Prickle cell layer

Explanation

Question 9 of 13

1

❌: Sensitive to sustained pressure, texture and edges of objects
❌: Sensitive to stroking, flutter & low frequency vibration
❌: Very sensitive to higher frequency vibration, act as event detectors during object manipulation
❌: Sensitive to shearing forces (e.g. drag)

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Merkel cells

Meissner corpuscles

Pacinian corpuscles

Ruffini endings

Explanation

Question 10 of 13

1

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Hairless skin is referred to as skin

Explanation

Question 11 of 13

1

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( Pacinian corpuscles, Meissner corpuscles, Ruffini endings ) are found in the subcutaneous tissues

Explanation

Question 12 of 13

1

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The structure is called a ...

Explanation

Question 13 of 13

1

Each hair unit is innervated by free nerve endings that either wrap around the follicle or run parallel to it. Label these fibres below.

Select correct option below corresponding to the highlighted orange point

Palisade Fibres

Circumferential Fibres

Longitudinal Fibres

	Created by Matthew Coulson about 6 years ago

Somatosensory system 1: Primary sensory neurones and their modalities given on 3/5/18

Physiology II: Somatosensory System 1 - Primary Sensory Neurones and their Modalities

Question 1 of 13

The Somatosensory System can be subdivided into 3 parts: ❌: Registers cutaneous sensation by numerous receptors ❌: Monitors posture and movement via receptors in muscles, tendons and joints ❌: Reports upon the internal state of the body

Select option below to complete the highlighted text

Explanation

Question 2 of 13

Fill the blank spaces to complete the text.

Resting membrane potential is mV, whereras the resting potential of a neuron is mV.

Explanation

Question 3 of 13

Fill the blank space to complete the text.

A is a receptor that responds to potentially damaging stimuli by sending 'threat' signals to the brain

Explanation

Question 4 of 13

❌ mediate cold, cool, indifferent, warm and hot sensations ❌ respond to extreme degrees of heat (both hot and cold) ❌ responds to potentially damaging substances in tissue

Select option below to complete the highlighted text

Explanation

Question 5 of 13

Select from the dropdown lists to complete the text.

Cutaneous afferent fibres in the fingertips are of a high low( high, low ) density of innervation, each fibre having a small large( small, large ) receptive field in order to allow a high low( high, low ) acuity in terms of sensation.

Explanation

Question 6 of 13

Select from the dropdown lists to complete the text.

Two point discrimination (spacial acuity) in higher in the finger tip forearm( finger tip, forearm ) but lower in the forearm finger tip( forearm, finger tip ), due to the differing sizes of the afferent fibres' receptive fields.

Explanation

Question 7 of 13

Select from the dropdown list to complete the text.

As receptive field size increases, spatial acuity decreases increases( decreases, increases ).

Explanation

Question 8 of 13

Which layer of the epidermis contains merkel cells?

Select one of the following:

Explanation

Question 9 of 13

❌: Sensitive to sustained pressure, texture and edges of objects ❌: Sensitive to stroking, flutter & low frequency vibration ❌: Very sensitive to higher frequency vibration, act as event detectors during object manipulation ❌: Sensitive to shearing forces (e.g. drag)

Select option below to complete the highlighted text

Explanation

Question 10 of 13

Fill the blank space to complete the text.

Hairless skin is referred to as skin

Explanation

Question 11 of 13

Select from the dropdown list to complete the text.

Pacinian corpuscles Meissner corpuscles Ruffini endings( Pacinian corpuscles, Meissner corpuscles, Ruffini endings ) are found in the subcutaneous tissues

Explanation

Question 12 of 13

Click on the orange point and select the correct answer.

The structure is called a ...

Explanation

Question 13 of 13

Each hair unit is innervated by free nerve endings that either wrap around the follicle or run parallel to it. Label these fibres below.

Select correct option below corresponding to the highlighted orange point

Explanation

The Somatosensory System can be subdivided into 3 parts:
❌: Registers cutaneous sensation by numerous receptors
❌: Monitors posture and movement via receptors in muscles, tendons and joints
❌: Reports upon the internal state of the body

❌ mediate cold, cool, indifferent, warm and hot sensations
❌ respond to extreme degrees of heat (both hot and cold)
❌ responds to potentially damaging substances in tissue

Cutaneous afferent fibres in the fingertips are of a ( high, low ) density of innervation, each fibre having a ( small, large ) receptive field in order to allow a ( high, low ) acuity in terms of sensation.

Two point discrimination (spacial acuity) in higher in the ( finger tip, forearm ) but lower in the ( forearm, finger tip ), due to the differing sizes of the afferent fibres' receptive fields.

As receptive field size increases, spatial acuity ( decreases, increases ).

❌: Sensitive to sustained pressure, texture and edges of objects
❌: Sensitive to stroking, flutter & low frequency vibration
❌: Very sensitive to higher frequency vibration, act as event detectors during object manipulation
❌: Sensitive to shearing forces (e.g. drag)

( Pacinian corpuscles, Meissner corpuscles, Ruffini endings ) are found in the subcutaneous tissues