Unit 1 - Biological Bases of Behavior - the nervous system

nervous system

-consists of all nerve cells

-the body's speedy electrochemical communication system

peripheral (pns)

-the sensory and motor neurons that connect the cns to the rest of the body

-autonomic

-somatic

-sympathetic

-parasympathetic

-(pass)

central (cns)

-contains spinal chord and brain in the center of the body

-brain

-spinal chord

autonomic

-controls involuntary functions or items that happen automatically within our body

-breathing, heartbeat, digestion, etc

-sympathetic

-parasympathetic

somatic

-controls voluntary movements and communication to and from the sense organs

-you control these items

brain

-the neural center of the body

-the body's control center

-interneurons

-sensory (afferent) neurons

-motor (efferent) neurons

-(same)

spinal cord

-super highway of nerves

-the body's means of transmitting messages to and from the brain

sympathetic

-physically arouses the body

-prepares it to act/react in stressful situations

-expends energy

-initiates "fight or flight"

-(symphony)

parasympathetic

-calms the body

-conserves its energy and helps keep a constant internal state

-returns to homeostasis

-"rest and digest"

-(pear)

interneurons

the only neurons in the cns acting as messengers between sensory and motor neurons

sensory (afferent) neurons

carries incoming messages/info from the sense receptors to the cns

motor (efferent) neurons

carries outgoing info from the cns to the pns and muscles

sympathetic nervous system

-inhibits digestion

-dilates pupils

-stimulates glucose release by liver

-stimulates release of epinephrine and norepinephrine by adrenal gland

-increases respiration rate

-increases heart rate and blood pressure

parasympathetic nervous system

-stimulates digestion

-promotes energy storage

-decreases respiration rate

-contracts pupils

-slows heart rate and lowers blood pressure