Nervous System and Neurons Overview

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What type of signals do neurons use to communicate?

Electrical signals only

Magnetic signals

Both electrical and chemical signals (correct)

Chemical signals only

Where does the processing of information take place in the nervous system?

Ganglia only

Brain only

Peripheral nervous system (PNS)

In simple clusters of neurons called ganglia or a more complex organization of neurons called a brain. (correct)

Which animal is mentioned as a good model for studying neuron function due to its extremely large nerve cells?

Mantle

Arm

Squid (correct)

Cone snail

What is the function of dendrites in a neuron?

Receive signals from other neurons Signup and view all the answers

What stage involves the detection of external stimuli and internal conditions in the nervous system?

Sensory input Signup and view all the answers

In the nervous system, where does integration take place?

In the central nervous system (CNS) Signup and view all the answers

Where does signal transmission occur in a neuron?

Synapse Signup and view all the answers

What is the function of ganglia in the nervous system?

To process information Signup and view all the answers

Where do nerves with giant axons, ganglia, and the brain belong within the nervous system?

Central nervous system (CNS) Signup and view all the answers

What is the function of neurotransmitters in signal transmission between neurons?

Passing information across the synapse Signup and view all the answers

Which part of a neuron has most of its organelles located in it?

Cell body Signup and view all the answers

What is the function of the axon in a neuron?

Transmit signals to other cells at synapses Signup and view all the answers

What is the main role of the peripheral nervous system (PNS)?

Bring information into and out of the CNS Signup and view all the answers

Which cells nourish or insulate most neurons in the nervous system?

Glia Signup and view all the answers

What is the main purpose of axons in a neuron?

Passing electrical signals away from the cell body Signup and view all the answers

In which part of a neuron does the transmission of information occur?

Axon Signup and view all the answers

Which of the following ions is important in the electrochemical signaling process of neurons?

Sodium and potassium Signup and view all the answers

How might increased branching of an axon help coordinate responses to signals communicated by the nervous system?

Enhance communication with other neurons Signup and view all the answers