Card Set Information
The Nervous System
What are the principle parts of the Nervous System?
central nervous system
peripheral nervous system
What are the components of the CNS?
What are the functions of the CNS?
Receives, processes and transfers voluntary and involuntary information.
What are the components of the PNS?
Nerves outside the CNS.
What is the function of sensory neurons?
Carry information toward the CNS.
What is the function of motor neurons?
Carry information away from CNS to muscles, glands, etc.
Where does love originate?
How fast can a nerve impulse travel?
Up to 250 mph.
What types of neurons are there?
Sensory, interneurons, and motor neurons.
What are Neuroglial cells?
Cells specialized for support and protection of neurons.
What is the function of myelin sheath in the PNS?
Saves the neuron energy, speeds up the transmission of impulses, helps damanged or severed axons regenerate.
What is a Scwann cell?
A type of neuroglial cell.
What is the myelin in the CNS formed by?
What happens in depolarization?
Sodium (Na) moves into the axon.
What happens in repolarization?
Potassium moves out of the axon.
Which of the following stages of an action potential is characterized by the rapid influx of Na ions into cytoplasm of the neuron?
What are the effects of neurotransmitter?
Excitatory and inhibitory.
What types of nerves are there?
Cranial and spinal nerves.
What is the function of the hindbrain?
Coordinates basic, automatic vital functions.
What is the function of the medulla oblongata?
Controls automatic functions of internal organs.
What is the function of the cerebellum?
Coordinates basic movements.
What is the funtion of the pons?
Aids flow of information.
What is the function of the midbrain?
Coordinates muscle related to vision and hearing.
What is the function of the forebrain?
Receives and intergrates into concerning emotions and conscious thought.
What is the function of the hypothalamus?
Helps regulate homeostasis.
What is the function of the thalamus?
Receiving, processing, and transfer center.
What is the function of the limbic system?
Neuronal pathways involved in emotions and memory.
What is the function of cerebrum and cerebral cortex?
Higher functions (math formulas).
What is short term memory?
Working memory, information from previous hours.
Where is short term memory?
What is long term memory?
Information from previous days to years.
Where is long term memory stored?
What happens in stage 1 of sleep?
Transitional, random small waves on EEG.
What happens in stage 2 of sleep?
Skeletal muscles relax, little eye or body movement, EEG shows sleep spindles.
What happens in stage 3 of sleep?
Heart and respiration slower. EEG shows slow wave sleep.
What happens in stage 4 of sleep?
Difficult to awaken, heart and respiration slowest, body temperature decreased.
What happens in REM sleep?
Dreaming, EEG same as awake.