13.1 Coordination

Question 1

How do animals react to changes in their external and internal environment

Answer 1

Through nuerones in an electrical response

And hormones in a chemical response

Question 2

How to plants react to changes in their environment

Answer 2

Through hormones

Question 3

Why is communication needed in organisms

Answer 3

Organisms need to coordinate the function of different cells and systems to operate effectively

Question 4

Define homeostasis

Answer 4

The functions of organs must be coordinated in order to maintain a relatively constant internal environment

Question 5

Explain cell signalling

Answer 5

When cells release chemicals which affect other cells - the target cells
Cells can transfer signals locally through nuerones and synapses or across large distances via hormones