BIO2101 Exam 3 Nervous System Review

Front

What is the function of the inactivation gate of a sodium channel?

Back

The inactivation gate of a sodium channel prevents ion flow during the refractory period.

Front

How many segments does the spinal cord have?

Back

The spinal cord has 31 segments.

Front

What is the term for conduction that jumps from node to node along a myelinated axon?

Back

Saltatory conduction.

Front

What is the connective tissue surrounding a whole nerve called?

Back

Epineurium.

Front

What type of neurons does the dorsal root contain?

Back

Sensory neurons.

Front

What is the role of myelin in nerve conduction?

Back

Myelin insulates axons, increasing the speed of electrical impulses.

Front

What are the three main parts of a neuron?

Back

Dendrites, cell body, and axon.

Front

What is the difference between sensory and motor neurons?

Back

Sensory neurons transmit signals to the central nervous system, while motor neurons transmit signals from the central nervous system to muscles.

Front

What is the function of the spinal cord?

Back

The spinal cord transmits signals between the brain and the rest of the body and coordinates reflexes.

Front

What is a reflex arc?

Back

A reflex arc is the neural pathway that mediates a reflex action.