1.1.4 Response to Surroundings

Question 1

The sensitivity of an organism refers to what?

Answer 1

its ability to detect and respond to stimuli in its surroundings

Question 2

In humans, the nervous system provides a complex system of what?

Answer 2

receptors, neurones and effectors which detect and respond to different stimuli using electrical impulses

Question 3

The endocrine system also allows what?

Answer 3

a response to stimuli using chemical messengers, which travel in the blood, called hormones

Question 4

The nervous system and endocrine system allow humans to respond to what?

Answer 4

to their environment

Question 5

In plants, responses are controlled by

Answer 5

Chemicals

Question 6

Are the chemicals in plants faster, or slower.

Answer 6

They are usually much slower

Question 7

Geotropism describes a plants response to what?

Answer 7

gravity which causes the roots to grow down into the soil

Question 8

Phototropism describes a plant’s response to what?

Answer 8

light which causes shoots to grow towards sunlight