Survival And Response Intro

Question 1

Stimulus

Answer 1

A change in the internal or external environment

Question 2

Internal environment

Answer 2

The environment inside an organism

Question 3

External environment

Answer 3

The environment outside an organism

Question 4

Receptor

Answer 4

Detects a stimulus

Question 5

Co-ordinator

Answer 5

Formulates a suitable response to a stimulus

Question 6

Effector

Answer 6

Produces a response

Question 7

Receptors are…

Answer 7

Specific to one particular stimulus

Question 8

Nerve cells are also known as

Answer 8

Neurones

Question 9

What do nerve cells/neurones do?

Answer 9

Pass electrical impulses along length
Releases chemical messengers (neurotransmitters) onto a target cell

Question 10

Synapse junction

Answer 10

A junction that separates 2 neurones
When a neurone receives impulse, either ions/chemical messengers diffuse across to stimulate next neurone

Question 11

What should responses be?

Answer 11

Short lived and localised

Question 12

Hormones

Answer 12

Chemicals that stimulate target cells via the blood

Question 13

How are hormones detected by target cells?

Answer 13

Tertiary structure of hormones is complementary to receptor proteins on target cells

Question 14

What kind of response is caused by hormones?

Answer 14

A longer lasting, slow, widespread response