Sensory Neurones

Flashcards about sensory, motor, and relay neurones.

What is the function of sensory neurons?

Sensory neurons are found in our sensory organs (eyes, nose, ears, tongue, and skin) and send impulses to the CNS (central nervous system).

What are the main components of a neuron?

The main components of a neuron are the cell body (containing the nucleus), dendrites, a dendron, an axon, and axon terminals.

What is the function of dendrites?

Dendrites receive impulses from receptor cells.

What is the function of motor neurons?

Motor neurons send impulses away from the CNS (brain & spinal cord) to an effector, such as a muscle or a gland, causing a response.

What are relay neurons and where are they found?

Relay neurons are short neurons found in the spinal cord, linking sensory and motor neurons.

What is the myelin sheath?

The myelin sheath is a fatty layer found in some neurons that insulates the electrical impulse, allowing it to travel faster along the neuron through saltatory conduction.

What is the function of the dendron in sensory neurons?

The dendron carries the impulse from the dendrites towards the cell body.

What is the axon's function?

The axon carries the impulse away from the cell body to the axon terminals and then onto other neurons or effectors.

List a key difference between sensory and motor neurons regarding the cell body's location.

Sensory neurons have the cell body in the middle of the neuron, while motor neurons have the cell body at one end.

List a key difference between sensory and motor neurons regarding dendrons.

Sensory neurons have a long dendron, while motor neurons typically may not have a dendron at all.

What is the main function of sensory neurons?

Sensory neurons carry impulses from receptor cells to the CNS.

What is the main function of motor neurons?

Motor neurons carry impulses from CNS to an effector, such as a muscle or gland.