Unit4- 5.3~ Nerve action

Question 1

What is nerve action?

Answer 1

• Information being transmitted across the body through nerve cells/neurons
• Neurons transmit messages in forms of electrical signals called nerve impulses or action potential

Question 2

Explain the axon

Answer 2

• Are very thin nerve fibres that carries nerve impulses away from the neuron to another neuron
• A neuron recieves sensory input, sending motor commands to muscles
• Every neuron has one axon that onnects it with other neurons or with muscle or gland cells

Question 3

Explain the myelin sheath

Answer 3

• An insulating layer, or sheath that forms around nerves, including those in brain, spinal cord
• It allows electrical impulses to transmit quickly and efficiently along the nerve cells
• If myelin is damaged, these impulses slow down

Question 4

Explain the synapse

Answer 4

• Is a small gap at the end of a neuron that alows a signal to pass from one neuron to the next, via neurotransmitter chemical
• Are found where nerve cells connect with other nerve cells
• They’re key to the brains function especially when it comes to memory