The Ear, Receptors And Sensations

Question 1

What is Sensation?

Answer 1

•Info detected by receptors, carried to CNS by PNS

Question 2

What is Perception

Answer 2

•How CNS processes/interprets info

Question 3

What is sensory adaptation?

Answer 3

•Process in which our brain cells experience diminished sensitivity to constant stimuli picked up by our senses.

Question 4

What are photoreceptors?

Answer 4

•detects loght Eg. rods and cones in our eye

Question 5

What are Chemoreceptors?

Answer 5

•detects chemical molecules Eg. taste buds

Question 6

What Are mechanoreceptors?

Answer 6

•detects physical/mechanical forces Eg. Hair cells in our ear

Question 7

What are thermoreceptors?

Answer 7

•detects temperature Eg, heat receptors in our skin

Question 8

What are Proproceptors?

Answer 8

• located in muscles, joints, and tendons, helps to detect and respond to movement and position of limbs and other body parts

Question 9

Taste: what kind of receptor and what direction does it go to process info?

Answer 9

•Chemoreceptors in the tongue (taste)
• signals travels to thalamus and processed in the parietal lobe

Question 10

Smell: what kind of receptor and what what direction does it take for it be processed?

Answer 10

• chemoreceptors in the nose, detected by Olfactory cells; sensory nerves that functions for the sense of smell
• signal goes to Olfactory centre than travels and gets processed in the frontal lobe

Question 11

How many sections in the ear?

Answer 11

• outer, Middle, and inner ear
•inner ear is fluid filled

Question 12

What is the function of Auricles/Pinna?
(Outer Ear)

Answer 12

• Skin & Cartilage, collect & funnel info to the ear
•contains ear wax & hair to protect the ear, prevents entry of foreign material

Question 13

What is the function of the Tympanic Membrane and Ear drum?
(Middle ear)

Answer 13

•covers end of auditory Canal, Converts sound waves to mechanical vibrations

Question 14

What is the Function of Eustachian Tube?
(Middle ear)

Answer 14

• allows pressure to equalize between cuddle ear& outside of body
• connects to back of throat, not really involved in hearing

Question 15

Function of Semi Circular Canal?

Answer 15

• contains receptors for balance

Question 16

Function of cochlea ?

Answer 16

•organs for hearing, sound waves are converted into nerve impulses to the brain

Question 17

Function of Organ of Corti?

Answer 17

•located in Cochlea, where mechanoreceptors are located

Question 18

Function of hair cells ?

Answer 18

•Contains stereocilia that detects sound waves.
• generate nerve impulses to the brain
; high pitch frequencies heard first low pitch heard at the end of

Question 19

What is the Pathway of sound through the Ear?

Answer 19

• Auricles-> Auditory Canal-> Tympanic Membrane-> Ossicles-> Oval window-> Cochlea-> Organ of Corti-> Hair cells

Question 20

What is the Process of sound perception?

Answer 20

•auditory nerve takes nerve impulses out of cochlea, than nerve impulses travel to thalamus than to the temporal lobe