Sensory physio

Question 1

“Specific sensations, specific receptors”

Answer 1

Differential sensitivity

Question 2

Slowly adapting receptors examples

Answer 2

Muscle spindles, Golgi tendons, baroreceptor, chemoreceptor

Question 3

Pacinian corpuscle is an example of ______-adapting receptor

Answer 3

Rapidly adapting

Has a predictive function

Question 4

Receptor found in glabrous skin and detects low frequency vibration

Answer 4

Meissner’s corpuscle

Question 5

__________ combine to form Iggo Dome receptors

Answer 5

Merkel’s disks

Question 6

Detects high frequency vibration; onion like structure in skin and deep fascia

Answer 6

Pacinian corpuscles

Question 7

Receptors in internal tissues and joint capsules that detect heavy and prolonged touch pressure

Answer 7

Ruffini’s end organs

Question 8

Which somatosensory pathway uses large myelinated fibers and crosses near the medulla?

Answer 8

Dorsal column-Medial lemniscus

Question 9

Which somatosensory pathway carries pain, temperature sensation and crude touch?

Answer 9

Anterolateral-spinothalamic tract

Question 10

Thalamic nuclei for DC-ML

Answer 10

Ventro postero lateral (VPL)

Question 11

Thalamic nuclei for trigemino thalamic pathway

Answer 11

VPM nuclei

Question 12

Fast pain sensation is transmitted via type ____ fibers

Answer 12

Type A Delta fibers

Question 13

Type C fibers carry ______ pain and is associated with ________

Answer 13

Slow pain
Tissue destruction
Neurotransmitter substance P

Question 14

Lateral inhibition principle

Answer 14

Stimulated tactile receptors can inhibit pain transmission in the spinal cord

Question 15

Part of the eye that has variable refractive powers

Answer 15

Lens

Question 16

When ciliary muscles are contracted, lens become _________

Answer 16

Spherical

Question 17

For distant objects:
Lens are ________
Ciliary muscles are ________
Suspensory ligaments are ___________

Answer 17

Lens flat
CM relaxed
Increased tension in suspensory ligaments

Question 18

Light cause _________ Polarization of receptors

Answer 18

Hyperpolarization

Question 19

________has no photoreceptors

Answer 19

Optic disc

Question 20

Which layer forms the optic nerve?

Answer 20

Ganglion cell layer

Question 21

Deterioration of pigment epithelium (Layer 1)

Answer 21

Macular degeneration

Question 22

Contrast detector cells

Answer 22

Bipolar cells

Question 23

Photopigment in rods

Answer 23

Rhodopsin

Question 24

Cones are used for daylight vision. True or False?

Answer 24

True!

Contains 3 types of photochemicals

Question 25

Irregular curvature of cornea

Answer 25

Astigmatism

Question 26

First sign of vitamin A deficiency

Answer 26

Nyctalopia

Question 27

Corrective lenses for hyperopia

Answer 27

Convex lenses

Question 28

Age related loss of accommodation is called _______ and corrected by _________ lenses

Answer 28

Presbyopia

Convex

Question 29

Speed of sound

Answer 29

335 m/sec

Question 30

Inner hair cell near oval window detects ______ frequency and are _____ and ________

Answer 30

High frequency

Short and stiff

Question 31

Perilymph is high in ______ whereas endolymph is high in _________

Answer 31

Peri - sodium

Endo - K+

Question 32

Detects changes in the rate and direction of the rotation of the head

Answer 32

Semicircular canals

Question 33

Function of the basilar membrane

Answer 33

Distributes stimulus along the organ of Corti

Question 34

Low threshold for this taste sensation

Answer 34

Bitter!

Question 35

Proteinacious meaty flavor

Answer 35

Umami

Question 36

Sense that has no relay station in the thalamus

Answer 36

Olfactory

Question 37

Nerve fibers for olfaction

Answer 37

Unmyelinated C fibers

Question 38

Use macules as sensory organs

Answer 38

Otolith organs

Detect linear acceleration and sometimes angular sensation

Question 39

Taste receptors are true neurons. True or False?

Answer 39

False!

Olfactory neurons are true neurons

Question 40

Labeled line principle

Answer 40

Specific sensation has specific pathways