Cell Signalling Overview

Question 1

What are the two main systems of communication in the body?

Answer 1

Nerve transmission and through the bloodstream.

Question 2

What is the main difference between nervous communication and communication through the blood?

Answer 2

Nervous communication is much faster than through the blood.

Question 3

What are the three main stages of neurotransmission?

Answer 3

1. Propagation of the action potential due to ion movement.
2. Neurotransmitter released from vesicles,
3. Postsynaptic receptor activated by NT.

Question 4

What are the chemicals that utilize the circulatory system to send messages generally referred to?

Answer 4

Hormones.

Question 5

What produces hormones?

Answer 5

Most major organs, however the pituitary gland and the hypothalamus in particular play a more prominent role.

Question 6

What are some key reasons for cell signaling?

Answer 6

To be able to process and co-ordinate information.
For self-preservation.
For voluntary movement.
For homeostasis.