Response And Relex

Question 1

Reflex

Answer 1

Rapid automatic response to pretext from danger

Question 2

3 neurones reflex arc made up from

Answer 2

Sensory
Relay
Motor

Question 3

Simple responses

Answer 3

Taxis and kenesis
Keep organisms within favourable conditions of environment

Question 4

Taxes

Answer 4

Entire body towards a favourable stim or away from unfavourable stim
Towards = poss taxes
Away = neg taxes

Question 5

Kinesis

Answer 5

Organisation changes speed of movement and the rate changes direction

Moves from beneficial stimuli to harmful stimuli increase rate it changes direction - return to favourable conditions quickly

Question 6

Receptor

Answer 6

Detect stimuli

Question 7

What does the stimulation of a recent lead to

Answer 7

Establishment of a generator potential causes a response

Question 8

Name three receptors

Answer 8

1. Pacinian corpuscle
2. Rod
3. Cone

Question 9

Pacinian corpuscle

Answer 9

Membranes have stretched mediate sodium channels
Open allow Na+ enter sensory neuron when stretched and deformed
Pressure applied deforms neurone, stretches widens Na+ channels so Na+ diffuses in = generator potential