18 Questions
What are the two main divisions of the nervous system, and what are they comprised of?
The central nervous system (CNS) and the peripheral nervous system (PNS); the CNS is composed of the brain and spinal cord, while the PNS is composed of peripheral nerves that connect the CNS to the rest of the body.
What are the two main components of the peripheral nervous system (PNS)?
The somatic nervous system and the autonomic nervous system.
How many pairs of cranial nerves arise from the underside of the brain?
Twelve pairs.
What are the three main functions of the nervous system?
Sensory, integrative, and motor functions.
What type of nerves are spinal nerves classified as?
Mixed nerves.
What is the difference between the somatic nervous system and the autonomic nervous system?
The somatic nervous system is consciously controlled, while the autonomic nervous system is unconscious.
What is the role of neuroglial cells in the nervous system?
They fill spaces, support neurons, provide structural frameworks, produce myelin, and carry on phagocytosis.
How many pairs of spinal nerves are there in the human body?
Thirty-one pairs.
What is the sequence of events that occurs in the nervous system to produce a response to a stimulus?
Sensory receptors gather information, convert it into nerve impulses, integrate the impulses in the brain as perceptions, and then produce motor functions via effectors.
What is the function of the ventral root of a spinal nerve?
It is a motor root.
What is the term for the point at which two neurons meet to transmit a signal?
Synapse.
What are the two main types of nerve impulses that are transmitted in the nervous system?
Sensory impulses and motor impulses.
What is the main function of the autonomic nervous system?
To maintain homeostasis of visceral activities without conscious effort
What are the two main divisions of the autonomic nervous system?
Sympathetic and parasympathetic divisions
What is the origin of the brachial plexuses?
Lower cervical and upper thoracic nerves
What areas of the body do the lumbrosacral plexuses lead to?
Lower abdomen, external genitalia, buttocks, and legs
What is the primary function of the cervical plexuses?
To supply muscles and skin of the neck
What is the characteristic of the autonomic nervous system during normal conditions?
The parasympathetic division operates under normal conditions
Learn about the central and peripheral nervous systems, and their functions in the body. Understand the role of the nervous system in providing sensory, integrative, and motor functions.
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