Stimulus And Response

Question 1

What is taxes?

Answer 1

Movement that is directed by a stimulus

Question 2

What is kinesis?

Answer 2

More random movements that are not directed by a stimulus

Question 3

What are orientation behaviours?

Answer 3

Orientation behaviours allow organisms to move towards favourable environments or away from unfavourable environments

Question 4

What is positive taxes?

Answer 4

Taxes towards a stimulus

Question 5

What is negative taxes?

Answer 5

Taxes away from a stimulus

Question 6

What is phototaxis?

Answer 6

Taxes depending on light

Question 7

What is chemotaxis?

Answer 7

Taxes depending on chemicals

Question 8

What is geotaxis/gravitaxis?

Answer 8

Taxes depending on gravity

Question 9

What is thermotaxis?

Answer 9

Taxes depending on temperature

Question 10

What are tropisms?

Answer 10

Responses that occur in response to a directional stimulus.

Question 11

What is a plant tropism?

Answer 11

Response cotnrolled by “plant growth factors”, made by tissues all over the plant, they may be used where they are made or transported within the plant. They usually exert their influence by affecting growth

Question 12

What do auxins do?

Answer 12

They can move by diffusion from cell to cell, or can be transported long distances via the phloem eg shoots to roots, auxin stimulates cell growth in shoots, auxin inhibits cell growth in roots, IAA is produced in root tip and shoot tips and has different effects on the cell elongation in the different cell types.

Question 13

What is a phototropisms?

Answer 13

Tropism in shoot only, IAA produced in the cells in the tip of the shoot, uneven light causes IAA to move to the shaded side, higher concentration on shade side causes cell to elongate more compared to the light side differential elongation, shoot bends towards the light

Question 14

What is gravitropism?

Answer 14

Tropism in roots and shoots, IAA produced in the cells in the tip of the root, gravity causes the IAA to move to lower side of the root and shoot, it causes differential elongation
Higher conc of IAA inhibit cell elongation in roots
Higher conc of IAA stimulate cell elongation in shoots

Question 15

What is a reflex?

Answer 15

Its an automatic involuntary protective response chain, rapid as it doesnt involve the brain, 3 neurones sensory relay and motor, its a protective response that increases survival

Question 16

What receptors arbused in the eye?

Answer 16

Light receptors

Question 17

What receptors are used in the nose?

Answer 17

Chemical

Question 18

What receptors are used in the toungue

Answer 18

Chemical

Question 19

What receptors are used in the skin?

Answer 19

Temperature, pressure and pain

Question 20

What type of receptors are used in ears?

Answer 20

Sound and balance

Question 21

What is the process of a reflex arc?

Answer 21

Stimuli, receptor, sensory neurone, co-ordinater (relay neurone), motor neurone, effecter, response