exam 3 new pt 2 Flashcards
Which part of the brain houses your personality?
prefrontal cortex
If we are experiencing an emotion, which part of the brain is active?
limbic system
Which part of the nervous system sets the heart rate?
medulla oblongata
What two structures are involved in DUAL INNERVATION?
sympathetic and parasympathetic
which structure controls your heart rate at rest
CN X
Which part of the brain receives touch information coming from the hand?
the postcentral gyrus on the opposite side (contralateral)
In the touch pathway coming from the hand to the primary somatosensory cortex, where does the action potential begin?
The action potential begins in the sensory receptors located in the skin of the hand.
Select ALL of the following structures that are involved in motor planning and motor signalling.
Primary motor cortex
Cerebellum
Basal ganglia
In the patellar knee-jerk reflex, what is the stimulus?
stretch quadriceps femoris muscle
In the patellar knee-jerk reflex, what is the response?
contraction of the quadriceps femoris muscle
How does the patellar knee-jerk reflex protect you?
if your knees start to buckle(flexing, the quadriceps femoris muscle contracts and keeps you standing
In the corneal blink reflex, what is the stimulus?
an irritant touching the front of the eye
How does the corneal blink reflex protect you?
blinking prevent an object from entering your eye
In the Golgi tendon organ reflex, what is the stimulus?
increased tension in the tendon
In the Golgi tendon organ reflex, what is the response?
relaxation of the muscle
How does the Golgi tendon organ reflex protect you?
it prevents muscle
functions of astrocyte
- anchor neurons and blood vessels
- regulate the extracellular environment
= facilitate the formation of the blood-brain barrier - repair damaged tissue
Which of the following structures is from the vascular layer of the eyeball?
Iris
To what part of the brain are both general and most special senses carried?
thalamus
Which part of the eye is highly vascularized and contains melanin that absorbs light to prevent reflection?
choroid
A test known as two-point discrimination threshold measures: (look up why)
the relative size of receptive fields.
The ciliary muscle contracts to
adjust the shape of the lens for close vision.
The ________ covers most of the exposed surface of the eye.
conjunctiva
In order to hear sound, vibrations pass from the eardrum to the ossicles, and on to the oval window.
True
The vitreous body
helps to stabilize the eye and give physical support to the retina.
Where do the axons of ganglion cells leave the eyeball?
optic disc
