module 5 - 13.8 reflexes Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

what are the features of a reflex/reflex action?

A
  • has a specific stimulus
  • is involuntary
  • has nearly instantaneous response
  • done to prevent damage to body
  • involves neural pathway called reflex arc (doesn’t involve brain)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what are the human reflexes needed to know?

A
  • knee-jerk/patellar reflex
  • blinking reflex
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what does a receptor cell transduce during a reflex?

A

mechanical energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

where does the nervous impulse travel during a reflex?

A
  • along the sensory neurone that enters and spinal cord via the dorsal root ganglion
  • then relay neurone forms synapses with relay neurone, which leaves spinal cord via ventral root
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is the spinal cord?

A

long, thin tubular structure made up of nervous tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what does the spinal cord do to the medulla oblongata?

A

extends medulla oblongata in brainstem to lumbar region of vertebral column

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what does the vertebral column do?

A

it encloses the central canal of the spinal cord which contains cerebrospinal fluid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what are the functions of the spinal cord?

A
  • transmission of nervous impulses from the motor cortex to the effectors
  • transmission of nervous impulses form the motor cortex to the effectors
  • coordinating reflexes
  • controlling motor instructions for rhythmic movement e.g. walking
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what type of reflex is the knee-jerk reflex?

A

spinal reflex that tests the functioning of the spinal cord

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is the knee jerk/patellar reflex?

A

striking below the patellar or knee cap, with a reflex hammer stretches the tendon of the quadriceps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is the blinking reflex?

A
  • cranial reflex involving PONS in the lower brain stem
  • occurs in response to external stimulus (e.g. contact with cornea/loud sounds)
  • fast reflex
  • reflex is consensual because both eyelids blink
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

how do reflexes increase an organisms chance or survival?

A
  1. being involuntary
  2. being innate
  3. fast
  4. controlling actions that are common place
How well did you know this?
1
Not at all
2
3
4
5
Perfectly