Introduction Flashcards
What are the 2 anatomical subdivisions?
Central nervous system (CNS) and peripheral nervous system (PNS)
What consist in the CNS?
Brain and spinal cord
What’s the function of the CNS?
1) Integrating, processing, and coordinating.
2) Intelligence, memory, learning, and emotion
What’s the function of the PNS?
1) Receive sensory information to CNS 2) Carries motor commands to peripheral tissues
***highway of nerves
What are the subdivisions of the PNS?
Afferent division and efferent division
Afferent division
Brings sensory information to the CNS
Receptors to CNS
- *arriving to CNS
- *note: think of A for afferent and arriving
Efferent division
Carries motor commands to muscles and glands.
Begins inside CNS and ends at an effector.
- *exiting the CNS
- *note: think of E for efferent and exiting
What are the 2 subdivisions of the efferent division?
Somatic nervous system (SNS)
Autonomic nervous system (ANS)
What does somatic mean?
Skeletal muscle
The afferent division carries information from:
1) somatic sensory receptors: skeletal muscles, joints, and skin
2) visceral sensory receptors: smooth muscle, cardiac muscle, and glands
3) special sense organs: eye, nose, tongue, and ear
What does visceral mean?
Smooth muscle
Somatic nervous system (SNS)?
- Controls skeletal muscle contractions
* May be voluntary or involuntary
Autonomic nervous system (ANS)?
- Also called visceral motor system
- Regulates smooth muscle, cardiac muscle, and glands.
- Is involuntary. Example- heart pumping blood
T/F
ANS is voluntary.
False. It is involuntary.
Nervous systems does what?
- Control and adjust the activities of other systems
* Relatively swift but brief responses
