stimuli and response

Question 1

what is a tactic response (taxis)?

Answer 1

-directional movement in response to a stimulus
-direction of stimulus affects response
-towards stimulus=positive taxis
-away from stimulus=negative taxis
(woodlice response to light)

Question 2

what is a kinetic response (kinesis)?

Answer 2

-non-directional movement in response to a stimulus
-intensity of stimulus affects response
(woodlice response to humidity)

Question 3

Suggest advantages of simple reflexes

Answer 3

• rapid
• Protect against damage to body tissues
• Do not have to be learnt
• Help escape from predators
• Enable homeostatic control