Nervous System- TRANSDUCTION in P.N.S.

Question 1

stimuli

Answer 1

forms of ENERGY: everything we perceive is a form of energy-light, sound, chemical, mechanical, temperature

Question 2

stimuli

Answer 2

forms of ENERGY: everything we perceive is a form of energy-light, sound, chemical, mechanical, temperature

Question 3

transduction

Answer 3

changing energy from one form to another; occurs in the P.N.S.

Question 4

transduction

Answer 4

changing energy from one form to another; occurs in the P.N.S.

Question 5

A. Receptors

Answer 5

• transduce energy
• change forms of energy to a type the body can use
• “Action Potential”=”nerve impulse”

Question 6

“Law of Specific Nerve Energy”

Answer 6

each receptor responds to only one type of energy

Question 7

Sensation V. Perception

Answer 7

• Sensation takes place at the receptor

- Perception takes place in the brain

Question 8

Classification of Receptors

Answer 8

1. ) exteroreceptors- sense external environment ex: touch, temp., pressure
   - “special senses” (more complicated) sight, smell, taste
   - “proprioreceptors” sense position of muscles and joints; monitor body’s position

2.) interoreceptors- sense internal environment

Question 9

B. Neurons

Answer 9

individual nerve cells

1. sensory or
2. motor

Question 10

C. Nerves & Classifications

Answer 10

cablelike collections of neurons (axons) in P.N.S. only
Classified: 1. “mixed” contain motor and sensory neurons; all spinal nerves are mixed
2. “sensory only” three cranial nerves are sensory only
3. “motor only” ??

Question 11

D. Ganglia & Types

Answer 11

collections of nerve cell bodies in the P.N.S.
Types: 
1. sensory: visceral 
somatic: dorsal root ganglia
2. motor: 
somatic- None 
visceral-A.N.S.
 a. parasympathetic "terminal ganglia" 
b. sympathetic: sympathetic chain ganglia, paravertebral 
c. collateral ganglia

Question 12

E. Plexus

Answer 12

network of interwoven nerves in P.N.S.

Question 13

F. Nucleus

Answer 13

collection of nerve cell bodies in the C.N.S.

Question 14

G. Tract

Answer 14

bundle of axons in the C.N.S. with a common origin, destination and function

Question 15

H. Column

Answer 15

several tracts bundled together in the spinal cord

Question 16

I. Gray Matter

Answer 16

dendrites, cell bodies, unmyelinated axons: In the brain: “cortex” and “nucleus” and in the spinal cord: “H” or “butterfly”

Question 17

J. White Matter

Answer 17

myelinated axons

Question 18

K. Neuroganglia

Answer 18

• supporting cells

- do NOT conduct action potentials