1.6- The Nervous System

Question 1

What are two main parts to the nervous system?

Answer 1

• The central nervous system (CNS) – the brain and
spinal cord.
• The peripheral nervous system – nerves taking
information from sense organs into the CNS, and nerves taking information from the CNS to effectors (muscle
or glands).

Question 2

What are receptor cells?

Answer 2

Special cells adapted to detect stimuli.

Question 3

What are effectors?

Answer 3

Glands or muscles that carry out a response.

Question 4

How are neurones adapted to their functions?

Answer 4

• Long
• Have an insulating sheath to prevent impulses from leaking away
• Branched endings so they can communicate with many other neurones