Understanding the Nervous System

In this diagram of a motor neurone, label 4 shows the

• dendron

• myelin sheath

• cell body

• node of Ranvier

Label the Neuron-What does the letter "H" represent?

• Myelin Sheath

• Axon

• Axon Terminal

• Dendrite

Where would the nerve impulse start in this reflex arc?

• A

• C

• D

• E

The diagram represents the components of a reflex arc. The arrows indicate the direction of information flow.

Cell E is a(n)

• sensory neuron

• motor neuron

• effector cell

• interneuron

• receptor cell

What is the primary function of dendrites in a neuron?

• To transmit signals away from the cell body

• To receive signals from other neurons

• To insulate the axon

• To produce neurotransmitters

Which part of the neuron is responsible for transmitting electrical impulses away from the cell body?

• Dendrites

• Axon

• Synapse

• Myelin sheath

In a reflex arc, what is the role of the sensory neuron?

• To carry impulses to the central nervous system

• To process information in the brain

• To transmit signals to muscles

• To produce reflex actions

Which of the following best describes a reflex arc?

• A voluntary response to a stimulus

• An involuntary and automatic response to a stimulus

• A conscious decision-making process

• A slow and deliberate action

What is the function of the myelin sheath in a neuron?

• To slow down nerve impulses

• To protect the neuron from damage

• To speed up the transmission of nerve impulses

• To connect neurons to each other

In a reflex arc, which component is responsible for the immediate response to a stimulus?

• Sensory neuron

• Motor neuron

• Relay neuron

• Effector