Nervous Tissue

Question 1

Describe the general features of nervous tissue

Answer 1

• Maintains homeostasis
• Initiates voluntary movements
• Responsible for perception, behaviour & memory

Question 2

Describe the 3 main functions of nervous tissue

Answer 2

• Sensory: transfer of info about detected stimuli to CNS
• Integrative: analyses & stores information
• Motor: stimulates effectors (muscle & glands) via PNS

Question 3

Nervous tissue consists of two different types of cells

Answer 3

1. Neurons (large nerve cells)

2. Neuroglia (small supportive cells)

Question 4

Neurons are structurally classified.

Name the 4 different types of neurons

Answer 4

1. Multipolar
2. Bipolar
3. Unipolar
4. Anaxonic
   * remember B-U-M-A… what are BUMA!

Question 5

Multipolar Neurons

Answer 5

• Several dendrites & one axon
• All motor neurons are multipolar
• Make up most of the neurons in the CNS

Question 6

Bipolar Neurons

Answer 6

• Small & rare
• Special sense organs (sight, smell, hearing)
• Contain 2 distinct processes: cell body sits between the axon and dendrite