Review (HAP) Unit 3 Concept 1- The Nervous System

The place where a neuron passes an impulse along to another neuron is called the:

• cell body
• synapse
• myelin sheath
• node of Ranvier

Sensory receptors that respond to movement and pressure are:

• mechanoreceptors
• nociceptors
• photoreceptors
• thermoreceptors

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NGSS.MS-LS1-8

The central nervous system is composed of which one of the following?

• sensory and motor neurons
• sense organs
• reflexes
• the brain and spinal cord

Action potentials require:

• sodium ions
• gated ion channels
• diffusion
• all of the above

In a reflex, the signal travels:

• from a sense organ to the brain
• to the spinal cord and back to a muscle
• first to the spinal cord, and then on to the brain
• from the brain to a sense organ.

Which is true about a neuron at rest?

• The outside of the neuron is negatively charged.
• The inside of the neuron is negatively charged.
• There is more sodium inside the cell than outside the cell.
• Both sides of the neuron have the same charge.

When an action potential reaches the end of a neuron, it triggers the release of:

• neurotransmitters
• neurohormones
• sodium ions
• potassium ions.

The process of maintaining a relatively constant internal environment despite changes in the external environment is called

• homeostasis
• regulation
• stimulation
• synapse

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NGSS.HS-LS1-3

The basic unit of structure and function of the nervous system are

• axons
• dendrites
• neurons
• neurotransmitters

The most specific division of the nervous system responsible for our “fight or flight” response it the

• autonomic
• parasympathetic
• sympathetic
• sensory division