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Flashcards in Sensory physio Deck (40):
1

"Specific sensations, specific receptors"

Differential sensitivity

2

Slowly adapting receptors examples

Muscle spindles, Golgi tendons, baroreceptor, chemoreceptor

3

Pacinian corpuscle is an example of ______-adapting receptor

Rapidly adapting
Has a predictive function

4

Receptor found in glabrous skin and detects low frequency vibration

Meissner's corpuscle

5

__________ combine to form Iggo Dome receptors

Merkel's disks

6

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

Pacinian corpuscles

7

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

Ruffini's end organs

8

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

Dorsal column-Medial lemniscus

9

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

Anterolateral-spinothalamic tract

10

Thalamic nuclei for DC-ML

Ventro postero lateral (VPL)

11

Thalamic nuclei for trigemino thalamic pathway

VPM nuclei

12

Fast pain sensation is transmitted via type ____ fibers

Type A Delta fibers

13

Type C fibers carry ______ pain and is associated with ________

Slow pain
Tissue destruction
Neurotransmitter substance P

14

Lateral inhibition principle

Stimulated tactile receptors can inhibit pain transmission in the spinal cord

15

Part of the eye that has variable refractive powers

Lens

16

When ciliary muscles are contracted, lens become _________

Spherical

17

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

Lens flat
CM relaxed
Increased tension in suspensory ligaments

18

Light cause _________ Polarization of receptors

Hyperpolarization

19

________has no photoreceptors

Optic disc

20

Which layer forms the optic nerve?

Ganglion cell layer

21

Deterioration of pigment epithelium (Layer 1)

Macular degeneration

22

Contrast detector cells

Bipolar cells

23

Photopigment in rods

Rhodopsin

24

Cones are used for daylight vision. True or False?

True!
Contains 3 types of photochemicals

25

Irregular curvature of cornea

Astigmatism

26

First sign of vitamin A deficiency

Nyctalopia

27

Corrective lenses for hyperopia

Convex lenses

28

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

Presbyopia
Convex

29

Speed of sound

335 m/sec

30

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

High frequency
Short and stiff

31

Perilymph is high in ______ whereas endolymph is high in _________

Peri - sodium
Endo - K+

32

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

Semicircular canals

33

Function of the basilar membrane

Distributes stimulus along the organ of Corti

34

Low threshold for this taste sensation

Bitter!

35

Proteinacious meaty flavor

Umami

36

Sense that has no relay station in the thalamus

Olfactory

37

Nerve fibers for olfaction

Unmyelinated C fibers

38

Use macules as sensory organs

Otolith organs
Detect linear acceleration and sometimes angular sensation

39

Taste receptors are true neurons. True or False?

False!

Olfactory neurons are true neurons

40

Labeled line principle

Specific sensation has specific pathways