Quiz Questions

* next to answers that may need to be corrected

The nerve fiber types responsible for pain are the ______ and ___ fibers, which have _____ action potential conduction velocity

A-δ , C, Slow

Tactile information from the lower body first synapses at the _____, while the same information from the upper body synapses at the _______.

Gracile nucleus, cuneate nucleus

T/F: All signals from the proprioceptive organs are processed at the VPL

False

Fast Pain is mediated by _______ fibers, Slow Pain is mediated by ______ fibers

Aδ, C

Which term below fits the following concept: A discrete area of the skin from which all cutaneous signals are processes at a particular dorsal root ganglion at a particular vertebral unit?

Dermatome

Which of the following is true of Pacinian corpuscles?

They are located in the deeper dermis, They are sensitive to vibration.

Which of the following is the final destination of proprioceptive information? Somatosensory cortex, cerebellum, spinal motor neurons

All of the above

The cause of the Blind spot phenomenon is the anatomical region of the retina known as the

optic disc

The Main compartment of the eye, making up 80% of its volume is filled with a substance known as ____

the vitreous humour

The types of photoreceptors are ____ which give high-sensitivity, low resolution images, and ____, which give low sensitivity, high resolution images

rods, cones

An On-center bipolar cell expresses the ____ receptor, and ______ in response to light

mGluR6, depolarizes

True or False: Baum’s loop carries information on the superior visual fields to the superior visual cortex, while Meyer’s loop carries information on the inferior visual fields to the inferior visual field.

False

The LGN of the thalamus is composed of three types of cells, where in the LGN are the Koniocellular neurons located?

In between the main layers

True or False: Columns in the visual cortex are tuned to respond to particular spatial orientations in objects/light patterns

true

The flow of visual information processing in higher order cortical areas separates into the “what” and “where” streams. Roughly where in the brain will the information flow to while following the “what” pathway?

Temporal lobe

The audible range of sound in a human is

20-20,000 Hz

The function of the outer ear is to

Focus sound waves into the external auditory meatus, help to differentiate sound location as above or below the head, and amplify sound waves common in human speech

Which of these is a sign that the auditory and balance systems share a common evolutionary origin?

a) that both systems use hair cells to signal info to the brain

b) that both systems are interconnected in the same macro-organ structure

c) that both systems make use of fluid filled chambers to turn energy into neural signals

d) that there are striking similarities between the organ of corti, and the gel-caps of the vestibular system

all of the above

The function of the organ of corti is

to act as a stable yet soft structure against which the hair cells rub, resulting in deflection of the hair cells

If a hair cell’s main axis of activation is at 0 degrees, what would happen if the hair was rotated at 90 degrees?

nothing