Nerve Endings

Question 1

Slowly adapting mechanoreceptor in hairless skin detecting vertical pressure (touch receptor)

Answer 1

Merkel cells

Question 2

Rapidly adapting mechanoreceptor found just below BMZ of skin. Detecting numbers of stimuli.

Answer 2

Free nerve endings

Question 3

Nerve ending found in all parts of hand and foot (greater numbers in finger tips). detecting touch.

Answer 3

Meissner’s corpuscles

Question 4

Rapidly adapting mechanoreceptors detecting pressure and possibly vibration. Found nipple and genital organs.

Answer 4

Pacinian corpuscles

Question 5

Dermal stretch receptor. Slowly adapting.

Answer 5

Ruffini endings.

Question 6

What does a joint receptor do?

Answer 6

Provides information on position, movement and stress acting on and around joints.

Question 7

What nerve responds to change of tension in tendons and is very sensitive to muscle contraction?

Answer 7

Golgi tendon organs😎

Question 8

What special muscle fiber responds to passive stretch?

Answer 8

Intrafusal muscle fibers.

Question 9

What fiber does the sensory information from skeletal muscle com from?

Answer 9

Intrafusal fibers.

Question 10

What 2 types of intrafusal muscle fibers do we have?

Answer 10

Nuclear bag type

Nuclear chain type

Question 11

What’s the fastest conducting sensory fiber?

Answer 11

Skeletal muscle proprioceptors (1A afferent).

Question 12

Encapsulated nerve endings
Free nerve endings

Which group is fast and which is slow?

Answer 12

Encapsulated⚡️

Free nerve endings🐢

Question 13

What sensory nerve is not myelinated?

Answer 13

Free nerve ending C.

Feels pain, itch and temperature.

Question 14

When biceps contacts, what muscle is the antagonist?

Answer 14

Triceps, the muscle that relaxes.

(The muscle contracting is called agonist).

Question 15

What groups are motor fibers classified into?

Answer 15

A,B,C

Question 16

What groups are sensory fibers classified into?

Answer 16

I-IV

unmyelinated sensory fibers are usually called C fibers rather than type IV

Question 17

What cell myelinates in the PNS?

Answer 17

Schwann cells

Question 18

Blood vessels supplying nerve

Answer 18

Vasa nervorum

Question 19

The larger The axon The more rapid conduction.

True or false?

Answer 19

True❤

Question 20

Where Are cell body’s of first order neurons found?

Answer 20

In a ganglion

Question 21

Where Are cell body’s of second order neurons found?

Answer 21

In the CNS

Question 22

Where Are cell body’s of third order neurons found?

Answer 22

In the thalamus.

Question 23

Where are upper motor neurons found?

Answer 23

Primary motor cortex of the frontal lobe.

Question 24

Where are lower motor neurons found?

Answer 24

All Cranial nerve motor nuclei and in the anterior horn in the spinal cord.

Question 25

Where is touch, pain and temperature pathways received?

Answer 25

Postcentral gyrus📨