Nervous Tissue and Cells

What is the primary composition of nervous tissue?

• Mainly extracellular space

• Primarily of cells with very little extracellular space

• Only neurons

• Only glial cells

What is the function of neurons in the nervous tissue?

• Insulating cells

• Supporting cells

• Conducting cells

• Protecting cells

What role do glial cells play in the nervous tissue? (Select 2.)

• Conducting signals

• Insulating and protecting neurons

• Producing myelin sheath

• Generating electrical impulses

What is the function of dendrites in a neuron?

• They release neurotransmitters.

• They receive signals from other neurons.

• They produce the myelin sheath.

• They send signals to other neurons.

What is the function of axons in a neuron?

• They release neurotransmitters.

• They receive signals from other neurons.

• They produce the myelin sheath.

• They send signals to other neurons.

What is the myelin sheath?

• A part of the cell body.

• The conducting fiber of the neuron.

• An insulating fatty layer that speeds transmission.

• The part of the neuron that contains the nucleus.

What is the significance of the Node of Ranvier?

• It is the site where the nucleus is located.

• It is the gap between myelin sheath segments that speeds up neural transmission.

• It is the part of the neuron that releases neurotransmitters.

• It connects dendrites to the cell body.

What is the cell body of a neuron also called?

• Axon

• Dendrite

• Soma

• Synapse

What does the nucleus of a neuron contain?

• Cytoplasm

• DNA

• Neurotransmitters

• Axon Terminals

Where are axon terminals found, and what is their function?

• At the beginning of the axon, to receive neurotransmitters.

• At the far end of the axon, to send neurotransmitters to a neighboring cell.

• Inside the cell body, to produce DNA.

• On the dendrites, to receive information from other neurons.