Nervous System Unit Test: Short Answers

Impulses approach the cell body of your neurons by running down the ________ of the neuron.

• Axon

• End brush

• Dendrites

• Synapse

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These cells are found in the central nervous system. They maintain homeostasis, form myelin, and provide support and protection for neurons. An example of this type of cell are the Schwann cells.

• Epithelial

• Myelin

• Glial

• Dendrites

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The minimum amount of irritation required to cause an impulse to be initiated in a sensory neuron is referred to as the ________ stimulus.

• Annoying

• Initial

• Firm

• Threshold

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In a resting neuron, the concentration of sodium ions (Na⁺) should be greater:

• On the outer surface of the cell memberane

• On the inner surface of the cell membrane

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Which of the following is NOT involved in a reflex reaction?

• Receptors

• Spinal interneurons

• Cerebral cortex interneurons

• Motor neurons

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Which part of your nervous system is responsible for identifying the correct answer to this question?

• Somatic nervous system

• Peripheral nervous system

• Central nervous system

• Autonomic nervous system

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Your test is finished, you feel confident, and a relaxing weekend lies before you. Your heartbeat and breathing rates are slow, your pupils are constricted, and your blood pressure is low. The system responsible for these symptoms is the:

• Parasympathetic nervous system

• Sympathetic nervous system

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Which of the following would be more likely to trigger your sympathetic nervous system than your parasympathetic nervous system?

• A wild bear running toward you

• A piece of paper

• A rainbow

• A puppy napping in a beam of sunshine

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Which of the following meninges is located farthest from the brain and closest to the skull?

• White matter

• Arachnoid mater

• Pia mater

• Dural mater

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This highly folded part of the brain is associated with many "higher" functions of the human brain, such as imagination, thought, and judgement.

• Medulla oblongata

• Cerebrum

• Cerebellum

• Thalamus

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