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Pathophysiology HSC203 Exam Questions And Answers CA$14.91   Add to cart

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Pathophysiology HSC203 Exam Questions And Answers

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Pathophysiology HSC203 Exam Questions And Answers sensory receptors/sense organs Classified into two categories: general senses and special senses. special senses include eye and ear What does special senses include?? Eye and Ear Sensory receptors can be classified by? location E...

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  • April 27, 2024
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Pathophysiology HSC203 Exam Questions
And Answers
sensory receptors/sense organs
Classified into two categories: general senses and special senses. special senses include eye and ear


What does special senses include??
Eye and Ear


Sensory receptors can be classified by?
location


Extroreceptors
near body surface, and sometimes referred to as cutaneous receptors


Examples of extroreceptors
touch, pressure, temperature, and pain


Visceroceptors
receptors that are located internally and provide information about the environment around the
viscera


Proprioceptors
monitor the position and movement of skeletal muscles and joints


Sensory receptors that are classifies by stimuli?
Mechanoreceptors, chemoreceptors, thermoreceptors, photoreceptors, nociceptors, osmoreceptors


Mechanoreceptors
Stimulated by mechanical force:
touch, pressure, equilibrium, hearing


Chemoreceptors
Activated by a change is chemical concentration---taste , smell


Photoreceptors
respond to light (rods and cones)


Thermoreceptors
respond to changes in temperature


Nociceptors
tissue damage, sensation produced is pain

, Osmoreceptors
respond to the osmolarity of the blood (water homeostasis) concentrated in hypothalamus


Palpebrae
eyelids


Where is the eye located?
orbit of the skull- forehead


conjuctiva
mucous membrane that lines the eyelids and outer surface of the eyeball


What controls movement of eye?
Six Skeletal muscles (extrinsic muscles)


Cranial Nerves III, IV, VI
control rectus and oblique eye muscles
move and rotate eyes


Sclera (outer layer)
white part of the eye, tough fibrous coat


uvea (middle layer of eye)
made up of choroid, a dark vascular layer adjacent to sclera


Iris
a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the
size of the pupil opening


physiology of vision
light rays of an object pass through the cornea, where they are refracted, and then through the
aqueous humor , and pupil


myopia
nearsightedness; eyeball is too long


hyperopia
farsightedness; eyeball is too short


presbyopia
farsightedness associated with aging


astigmatism
defective curvature of the cornea or lens of the eye

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