Final Exam: Reflexes

Question 1

What does a reflex consist of?

Answer 1

Afferent n. Spinal cord segment, efferent n, and motor unit

Question 2

T/F Reflexes do not require cerebral input

Answer 2

T

Question 3

T/F Responses do not require cerebral input

Answer 3

F

Question 4

T/F a response is and involuntary behavior

Answer 4

F, voluntary

Question 5

T/F the frontal lobe initiates reflexive actions

Answer 5

F. responsive

Question 6

When you pinch the fifth digit, which nerve is Afferent?

Answer 6

Ulnar

Question 7

When you pinch the fifth digit, which spinal cord segment is affected?

Answer 7

C6-T2

Question 8

When you pinch the fifth digit, which spinal cord is efferent

Answer 8

musculocutaneous
median
ulnar

Question 9

Nerves of the thoracic limb comes from which spinal cord segment?

Answer 9

C6-T2

Question 10

Nerves of the pelvic limb come from which spinal cord segment?

Answer 10

L4-S3

Question 11

T/F a Reflex can occur without a response

Answer 11

T

Question 12

What is another name for spinal reflexes?

Answer 12

reflex arc

Question 13

T/F. Spinal reflexes have an afferent (sensory) and an efferent (motor) component

Answer 13

T

Question 14

What would an monosynaptic spinal reflex be?

Answer 14

one afferent n to one efferent n.

Question 15

What would a polysynaptic reflex arc look like?

Answer 15

will have interneuron
associated with.
sone afferent to many efferent

Question 16

What are UMNs?

Answer 16

Cell bodies are in the brain and terminal axon at the SC

Question 17

What are LMNs?

Answer 17

cell bodies in the SC, Axons terminate at target organ

Question 18

What do UMNs synapse with?

Answer 18

LMNs

Question 19

What do LMNs synapse with?

Answer 19

Target m. or gland

Question 20

Which MN regulates reflexes, and sends signals from the brain?

Answer 20

UMNs

Question 21

What is the afferent and efferent n. in PLR?

Answer 21

A: 2
E: 3

Question 22

What is the Afferent and efferent in Corneal reflex?

Answer 22

A: Ophthalmic br. of 5
E: 7, 6,

Question 23

What is the Afferent and efferent n. in Palpebral Reflex?

Answer 23

A: maxillary br. of 5 and ophthalmic br. of 5
E: 7

Question 24

What is Afferent and efferent n. in menance resp.?

Answer 24

A:2
E: 7

Question 25

What is the afferent and efferent n. in pain response?

Answer 25

Not a reflex!!!

has cortical involvement

Question 26

What is afferent n. and efferent n. in panniculus reflex?

Answer 26

A:superficial pain receptors
E: lat. thoracic

Question 27

what spinal segment in panniculus reflex?

Answer 27

c8-t1

Question 28

What is the motor unit of panniculus reflex?

Answer 28

cutaneous trunci mm.

Question 29

What are the afferent n. in withdrawal reflex?

Answer 29

nociceptors

Question 30

Afferent n. when pinch bottom of foot?

Answer 30

tibial n.

Question 31

What spinal cord segment when pinch bottom of foot

Answer 31

L4-S2

Question 32

T/F diff. parts of the same n. can be stimulated and inhibited at the same time?

Answer 32

T

Question 33

T/F the same n. that was used as and afferent can be used as and efferent to stimulate or inhibit motor unit.

Answer 33

T

Question 34

What is clonus?

Answer 34

When reflex is over, the m. relaxes and the joint may flex again then stretches again and repeat