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Questions and Answers
What is the primary function of the CNS in response to sensory information from afferent nerves?
What is the primary function of motor nerves in the nervous system?
Which of the following is an example of a response to changes in the internal environment?
Which of the following structures is NOT a component of the nervous system?
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What is the outcome when the structures of the nervous system do not function normally?
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What is the primary function of the sensory division of the peripheral nervous system?
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What are the two main divisions of the autonomic nervous system?
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What is the term for the transmission of impulses from the CNS to muscles?
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What is the primary function of the somatic nervous system?
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What is the primary function of the central nervous system?
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What is the term for the nerves that transmit impulses from sensory receptors to the CNS?
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What is the term for the process of transmission of impulses from one neuron to another?
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What is the term for the cells that provide support and maintenance functions for neurons?
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Study Notes
Functions of the Nervous System
- Detects and responds to changes inside and outside the body
- Coordinates and controls vital aspects of body function and maintains homeostasis
Components of the Nervous System
- Brain
- Spinal cord
- Peripheral nerves
Organization of the Nervous System
- Central Nervous System (CNS): brain and spinal cord
- Peripheral Nervous System (PNS): nerves outside the brain and spinal cord
Peripheral Nervous System (PNS)
- Comprises paired cranial and sacral nerves
- Some nerves are sensory (afferent), transmitting impulses to the CNS
- Some nerves are motor (efferent), transmitting impulses from the CNS
- Others are mixed
Functional Parts of the PNS
- Sensory division
- Motor division
- Somatic nervous system: controls voluntary movement of skeletal muscles
- Autonomic nervous system: controls involuntary processes (e.g. heartbeat, peristalsis, glandular activity)
- Sympathetic division
- Parasympathetic division
Nervous System Process
- CNS receives sensory information from afferent nerves
- CNS integrates and processes input and responds by sending nerve impulses through motor nerves to effector organs (muscles and glands)
- Responses to internal environment changes: regulate essential involuntary body functions (e.g. respiration, blood pressure)
- Responses to external environment changes: maintain posture and other voluntary activities
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Description
Learn about the structure and functions of the nervous system, including its role in maintaining homeostasis and its relationship with the endocrine system.
