Response 2 Stimuli and Reflex Arc

Question 1

Why is Kinesis advantageous ?

Answer 1

Advantageous to avoid predators and competition

increase chance of finding/staying in favourable conditions

Question 2

Define Stimulus

Answer 2

detectable change in the internal/external environment

of an organism that leads to a response

Question 3

Why are responses 2 stimuli advantageous?

Answer 3

Due to selection pressure
Increase the chance of survival
increase chance to raise offspring and pass alleles to the next generation

Question 4

Put these in order

Stimulus/effector/response/cordinator/receptor

Answer 4

Stimulus
Receptor 
coordinator
effector
response

Question 5

Define taxis

Answer 5

Simple directional response where the direction is determined by the direction of the stimulus

Question 6

What image is a reminder to the definition of taxis?

Answer 6

Taxi

Question 7

What are the two different types of taxis and how to they differ?

Answer 7

Positive Taxis= move towards stimulus

Negative taxis = move away from stimulus

Question 8

Name three types of taxis

Answer 8

phototaxis
chemotaxis
hydrotaxis

Question 9

Define Kinesis

Answer 9

A response where the speed of movement and the rate at which is changes directionis changed

Question 10

Where are woodlice studied?

Answer 10

In choice chambers

Question 11

Define tropism

Answer 11

grwoth of a plant in respose to a directional stimulus can be + or -

Question 12

Why are animals left in the new condition b4 the expermient ?

Answer 12

To allow conditions to be established

2 allow animal 2 adapt to new condition

Question 13

Which movement indicates kinesis?

Answer 13

random movement

Question 14

Name the sequence of the reflex arc

Answer 14

Stimulus
Receptor
Sensory Neurone
Co-ordinator
Motor neurone
Effector
Response

Question 15

Describe the reflex reponse (4)

Answer 15

Rapid
Localised
Involuntry
Short lived

Question 16

Why is the Reflex Arc important (4)

Answer 16

Reflex Arc protects body from harm
present from birth so doesn’t have tp be learnt
Fast with few synapses
Involuntary so brain is not overloaded

Question 17

Where does the Motor Nervous system send elecrtical waves?

Answer 17

From the central Nervous System to the effector

Question 18

Where does the Sensory Nervous System send elecrtical waves?

Answer 18

From receptors to the central Nervous System

Question 19

What makes up the Motor Nervous System?

Answer 19

Voluntary Nervous System

and Autonomic Nervous System

Question 20

How do you determine is the lamp is the stimulus for certain?
How do you eliminate temp and gravity?

Answer 20

use a heat filter on the lamp to eliminate the temp

rotate the box