Lab Manual 23-24

Question 1

What sensory receptors belong to free nerve endings?

Answer 1

Hair root plexuses, Merkel cells, itch & tickle receptors.

Question 2

What sensory receptors belong to encapsulated nerve endings?

Answer 2

Ruffini’s corpuscle, Pacinian corpuscles, corpuscles of touch.

Question 3

What receives input from third-order neurons: where sensory information is consciously perceived?

Answer 3

Cerebral cortex

Question 4

What cell body is located in spinal cord of the brain-stem?

Answer 4

Second-order neurons

Question 5

What is the gateway to cerebral cortex; location of synapse between second-order and third-order neurons.

Answer 5

Thalamus

Question 6

What is the neuron associated with sensory receptors?

Answer 6

First-order neuron

Question 7

What relays sensory nerve impulses from thalamus to cerebral cortex?

Answer 7

Third-order neuron

Question 8

What is the cell body for first-order neuron located here?

Answer 8

Posterior dorsal root ganglion

Question 9

What is deferred pain?

Answer 9

Pain sensation originating in a visceral organ and perceived in a specific region of the body surface that is innervated by spinal segments.

Question 10

When you hit your funny bone (olecranon) where would you experience pain?

Answer 10

Digits 4-5 & Ulnar.

Question 11

Why would pain persist even after the stimulation is removed?

Answer 11

Can cause diffuse stimulation of visceral nociceptors that can be felt as slow pain.

Question 12

What is the nerve carrying the axon of the first-order neuron and the levels where the first-order neuron enters the spinal cord?

Answer 12

Femoral nerve L2-L4

Question 13

Do the cerebellar hemispheres receive proprioceptive nerve impulses ipsilaterally or contralaterally?

Answer 13

Ipsilaterally

Question 14

Is proprioception consciously perceived by the cerebellum?

Answer 14

No.

Question 15

What is the accessory eye structure that drains tears into the nasal cavity?

Answer 15

Nasolacrimal duct

Question 16

What produces tears?

Answer 16

Lacrimal apparatus

Question 17

What is the membrane that covers the inner surface of eyelid?

Answer 17

Palpebral-conjunctiva

Question 18

Where do tears from surface of eye drain into?

Answer 18

Lacrimal canals

Question 19

What is the membrane that covers the anterior surface of the sclera?

Answer 19

Bulbar conjunctiva

Question 20

What drains tears into the nasolacrimal duct?

Answer 20

Lacrimal sac

Question 21

What produces aqueous humor?

Answer 21

Ciliary process

Question 22

What are the structures that are part of the vascular tunic?

Answer 22

Iris, ciliary body, choroid

Question 23

What is the structure that contains photoreceptors?

Answer 23

Retina

Question 24

What controls the size of the pupil?

Answer 24

Iris

Question 25

What drains aqueous humor?

Answer 25

Sclera, venous sinus

Question 26

What are the structures that are part of the fibrous tunic?

Answer 26

Cornea, sclera, sclera venous sinus.

Question 27

What is the most anterior part of the eyeball?

Answer 27

Cornea

Question 28

What is the anterior boundary of the retina?

Answer 28

Ora serrata

Question 29

What attaches the lens to the ciliary body?

Answer 29

Suspensory ligaments

Question 30

What changes shape to focus light on the retina?

Answer 30

Lens

Question 31

Where is the location of aqueous humor?

Answer 31

Anterior cavity, anterior chamber, posterior chamber.

Question 32

What is the white, outer layer of the eyeball?

Answer 32

Scleral