5.1.1: Communication And Homeostasis

Question 1

What do multicellular organisms require for survival?

Answer 1

Communication systems

These systems help coordinate the activities of different organs.

Question 2

What are the two main communication systems in animals and plants?

Answer 2

Nervous and hormonal systems

These systems work together to coordinate activities within an organism.

Question 3

What is the purpose of chemical signalling in cells?

Answer 3

To communicate with adjacent and distant cells

This is essential for coordinating various functions within the organism.

Question 4

What are target cells?

Answer 4

Cells that are affected by chemical signals

These can be adjacent or distant from the signaling cell.

Question 5

What is an example of a chemical signal that affects adjacent cells?

Answer 5

Release of neurotransmitters at a synapse

This type of signaling is crucial for nerve communication.

Question 6

How does insulin function in the body?

Answer 6

It is released by pancreatic cells and regulates blood glucose concentration

Insulin is transported in the blood to target cells in the liver.

Question 7

Fill in the blank: The systems that coordinate activities within a whole organism are the _______.

Answer 7

nervous and hormonal systems

Question 8

True or False: Chemical signals can only affect adjacent cells.

Answer 8

False

Some signals can transfer information over large distances within the organism.