Nervous System Quiz: 15 Questions With Answers
Updated
The nervous system divides into the central nervous system (brain and spinal cord) and peripheral nervous system (nerves). The peripheral system splits into somatic (voluntary) and autonomic (involuntary) branches. Neurons are the signaling cells, supported by glia like oligodendrocytes.
This quiz tests your understanding of the nervous system's organization, from the central and peripheral divisions to the somatic and autonomic pathways. It is designed for students, healthcare trainees, and anyone curious about how the brain, spinal cord, and nerves work together. The 15 questions progress from easy to hard, covering main organs, cell types, and functional subdivisions.
Before you begin, remember that the nervous system divides structurally into the central nervous system (brain and spinal cord) and the peripheral nervous system (everything else). Functionally, the peripheral system splits into the somatic system for voluntary control and the autonomic system for involuntary regulation. Neurons and glial cells are the essential building blocks.
The questions
Which structures make up the central nervous system?
Which cell type is the basic functional unit of the nervous system?
Which part of a neuron typically receives signals from other neurons?
What is the small gap between two neurons where communication occurs?
Which type of glial cell forms the myelin sheath in the central nervous system?
Which division of the peripheral nervous system controls voluntary skeletal muscle movements?
Which division of the peripheral nervous system regulates involuntary functions like heart rate and digestion?
Which autonomic division prepares the body for 'fight or flight'?
Which autonomic division promotes 'rest and digest' activities?
What is the main function of the spinal cord?
Which part of a neuron conducts electrical impulses away from the cell body?
Which brain region acts as the main relay station for sensory information (except smell) before it reaches the cerebral cortex?
Which brain region is essential for coordinating voluntary movements, balance, and motor learning?
Which brain region is involved in executive functions such as decision-making and working memory?
The enteric nervous system, which controls gut function, is considered part of which broader division?
0 of 15 answered · 0 correct
Cheat sheet: key terms
| Central nervous system | Brain and spinal cord; processes information and coordinates responses. |
|---|---|
| Peripheral nervous system | Nerves and ganglia outside the brain and spinal cord; connects CNS to the body. |
| Neuron | Electrically excitable cell that transmits information via electrical and chemical signals. |
| Glial cells | Support cells in the nervous system that insulate, protect, and nourish neurons. |
| Somatic nervous system | Controls voluntary movements of skeletal muscles; part of the peripheral nervous system. |
| Autonomic nervous system | Regulates involuntary functions like heart rate, digestion, and glandular activity. |
| Sympathetic division | Prepares the body for 'fight or flight'; increases heart rate and dilates pupils. |
| Parasympathetic division | Promotes 'rest and digest'; slows heart rate and stimulates digestion. |
Answers explained
Show all 15 answers
- Which structures make up the central nervous system? Brain and spinal cord. The central nervous system consists of the brain and spinal cord, while the peripheral nervous system includes all nerves and ganglia outside these structures.
- Which cell type is the basic functional unit of the nervous system? Neuron. Neurons are specialized to transmit electrical and chemical signals, making them the fundamental units of nervous system function.
- Which part of a neuron typically receives signals from other neurons? Dendrites. Dendrites are branched extensions that receive inputs from other neurons and convey them toward the cell body.
- What is the small gap between two neurons where communication occurs? Synapse. The synapse is the junction where a signal passes from one neuron to another, typically via neurotransmitters.
- Which type of glial cell forms the myelin sheath in the central nervous system? Oligodendrocytes. Oligodendrocytes produce myelin in the brain and spinal cord, while Schwann cells do so in the peripheral nervous system.
- Which division of the peripheral nervous system controls voluntary skeletal muscle movements? Somatic nervous system. The somatic nervous system innervates skeletal muscles and is under conscious control, unlike the autonomic system.
- Which division of the peripheral nervous system regulates involuntary functions like heart rate and digestion? Autonomic nervous system. The autonomic nervous system controls internal organs and glands without conscious effort, maintaining homeostasis.
- Which autonomic division prepares the body for 'fight or flight'? Sympathetic nervous system. The sympathetic division increases heart rate, dilates pupils, and redirects blood flow to muscles during stress.
- Which autonomic division promotes 'rest and digest' activities? Parasympathetic nervous system. The parasympathetic division slows heart rate, stimulates digestion, and conserves energy during relaxed states.
- What is the main function of the spinal cord? Relay signals between the brain and body and coordinate reflexes. The spinal cord conducts information between the brain and peripheral nerves and is the site of many reflex arcs.
- Which part of a neuron conducts electrical impulses away from the cell body? Axon. The axon is a long projection that carries action potentials from the cell body to other neurons, muscles, or glands.
- Which brain region acts as the main relay station for sensory information (except smell) before it reaches the cerebral cortex? Thalamus. The thalamus processes and routes sensory signals to appropriate cortical areas, acting as a gateway for most sensory modalities.
- Which brain region is essential for coordinating voluntary movements, balance, and motor learning? Cerebellum. The cerebellum fine-tunes motor commands, maintains posture, and contributes to procedural learning.
- Which brain region is involved in executive functions such as decision-making and working memory? Prefrontal cortex. The prefrontal cortex, located at the front of the frontal lobe, is critical for planning, reasoning, and personality.
- The enteric nervous system, which controls gut function, is considered part of which broader division? Autonomic nervous system. The enteric nervous system is a subdivision of the autonomic nervous system and operates semi-independently to regulate digestion.
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