exam 3 new pt 2

Question 1

Which part of the brain houses your personality?

Answer 1

prefrontal cortex

Question 2

If we are experiencing an emotion, which part of the brain is active?

Answer 2

limbic system

Question 3

Which part of the nervous system sets the heart rate?

Answer 3

medulla oblongata

Question 4

What two structures are involved in DUAL INNERVATION?

Answer 4

sympathetic and parasympathetic

Question 5

which structure controls your heart rate at rest

Answer 5

CN X

Question 6

Which part of the brain receives touch information coming from the hand?

Answer 6

the postcentral gyrus on the opposite side (contralateral)

Question 7

In the touch pathway coming from the hand to the primary somatosensory cortex, where does the action potential begin?

Answer 7

The action potential begins in the sensory receptors located in the skin of the hand.

Question 8

Select ALL of the following structures that are involved in motor planning and motor signalling.

Answer 8

Primary motor cortex
Cerebellum
Basal ganglia

Question 9

In the patellar knee-jerk reflex, what is the stimulus?

Answer 9

stretch quadriceps femoris muscle

Question 10

In the patellar knee-jerk reflex, what is the response?

Answer 10

contraction of the quadriceps femoris muscle

Question 11

How does the patellar knee-jerk reflex protect you?

Answer 11

if your knees start to buckle(flexing, the quadriceps femoris muscle contracts and keeps you standing

Question 12

In the corneal blink reflex, what is the stimulus?

Answer 12

an irritant touching the front of the eye

Question 13

How does the corneal blink reflex protect you?

Answer 13

blinking prevent an object from entering your eye

Question 14

In the Golgi tendon organ reflex, what is the stimulus?

Answer 14

increased tension in the tendon

Question 15

In the Golgi tendon organ reflex, what is the response?

Answer 15

relaxation of the muscle

Question 16

How does the Golgi tendon organ reflex protect you?

Answer 16

it prevents muscle

Question 17

functions of astrocyte

Answer 17

• anchor neurons and blood vessels
• regulate the extracellular environment
  = facilitate the formation of the blood-brain barrier
• repair damaged tissue

Question 18

Which of the following structures is from the vascular layer of the eyeball?

Answer 18

Iris

Question 19

To what part of the brain are both general and most special senses carried?

Answer 19

thalamus

Question 20

Which part of the eye is highly vascularized and contains melanin that absorbs light to prevent reflection?

Answer 20

choroid

Question 21

A test known as two-point discrimination threshold measures: (look up why)

Answer 21

the relative size of receptive fields.

Question 22

The ciliary muscle contracts to

Answer 22

adjust the shape of the lens for close vision.

Question 23

The ________ covers most of the exposed surface of the eye.

Answer 23

conjunctiva

Question 24

In order to hear sound, vibrations pass from the eardrum to the ossicles, and on to the oval window.

Answer 24

True

Question 25

The vitreous body

Answer 25

helps to stabilize the eye and give physical support to the retina.

Question 26

Where do the axons of ganglion cells leave the eyeball?

Answer 26

optic disc