Nervous Flashcards
What does the nervous system do?
Basic system of communication and regulation within the body.
What are the 3 basic functions of the nervous system?
sensory functions (input). integrating functions (brain for processing). motor functions (output)
Somatic nervous system?
the one you controle…
contains CNS and PNS
What is included in the CNS?
brain and spinal cord
what is included in the PNS?
motor and sensory nerves
Autonomic nervous system houses the??
Sympathetic and parasympathetic nervous systems
- is automatic!!
Sympathetic nervous system?
Fight or flight.
Parasympathetic is?
Rest and restore.
What is afferent?
Conduct never impulses TOWARD the CSN. Sensory!
Efferent is?
Conduct never impulses AWAY from the CNS. Motor!
What does the somatic nervous system do?
You decide. Controls skeletal muscle. Sensory function-afferent. Motor function-efferent.
What does the autonomic nervous system do?
Controls smooth muscle, cardiac, and endocrine glands automatically.
You can not control it.
Also has sensory and motor branches.
Neuroglia?
Or glial cells. Structurally and functionally support and protect the nervous system.
Not directly involved.
Neurons?
Responsible for transmission of impulse.
Who receives and who gives?
Dendrites.
What causes the nerve impulse?
Depolarization and repolorization.
Know how to draw re/depolarization
Woo!
What is depolarization?
Sodium channel opens and sodium goes in cell. Making it positive.
What is Repolorization ?
Potassium channel opens and K rushes out. Back to negative.
Sodium potassium pump?
This is continually pumping 2 K in 3 Na out. Active transport.
What is resting state?
When a neuron is not being stimulated.
More Na is outside and more K is inside.
Resting membrane potential?
The electrical difference in charges across the membrane.
Action potential?
The large change from negative to positive.
What is threshold?
Strong enough stimulus to cause complete depolarization
