Sensory Systems

Question 1

Touch

Answer 1

Physical pressure; light and heavy pressure, pain, temperature; frequency; corpuscles, free nerve endings; Usually 1; Mechanical to action potential; area specific; sensory cell

Question 2

Taste

Answer 2

Chemical; 4 major, acid, salt, sweet, bitter; concentration dependent to saturation; taste buds; 2; conductance (H or Cl) or receptor based. NT release AP in second nerve; tongue; saturation

Question 3

Olfactory

Answer 3

Volitile chemical; specific and general receptors; concentration dependent to saturation; cilia projections from nerve; 1; receptor based; paired nasal passages; saturation

Question 4

Hearing

Answer 4

Air pressure; pitch, wave frequency; loudness, wave amplitude; hair cells; 2; 1. Air pressure 2. Mechanical 3. Hydraulic 4. Physical 5. K current 6. NT release 7. AP in second nerve; paired, opposite sides; hair cell damage or secondarily

Question 5

Balance

Answer 5

Gravity, orientation; down, angular rotation; NA; hair cells; 2; 1. Mechanical 2. Hydraulic 3. Physical 4. K current 5. NT release 6. AP in second nerve; paired opposite sides; must match visual input

Question 6

Vision

Answer 6

Electromagnetic waves, photons; color, wave frequency; photon number; rods and cones 3 basic colors; many; 1. Photon 2. Photopigments activate phosophodiesterase to cGMP to GMP 3. Na Channels close 4. NT release stops 5. Next cell layer depolarizes transmitted to next layers; paired; sceondarily

Question 7

Qualities to Look For

Answer 7

Modality, Quality, Intensity, Cell Type, Cell Number, Waveform Changes, Location, Adaptaion