nuerotransmitters relay info from the nerve to another cell
lock and key method
what division of the peripheral nervous system control voluntary response?
somatic divison: carries info to CNS to skeletal muscle
what part of the peripheral nervous system control involuntary responses?
autonomic division regulates the the internal evironment
CNS-->smooth mucles and glands
carry messages from neuron to neuron
found only in the CNS
decision making nerves
which division of the nervous system is most closely associated with the fight or flight response?
sympathetic: increase vitals
make up the myelin sheath to promote better signal transmission
Why do people with MS have problems controllign their muscle contractions?
The scar tissue or plaques form when the protective and insulating myelin covering the nerves is destroyed, a process called demyelination. Without the myelin, electrical signals transmitted throughout the brain and spinal cord are disrupted or halted.
What do drugs and alcohol interfere with when they "use"?
prefrontal cortex, the lobes
explain: parasympathic and sympathetic=homeostasis
sympathetic= increase of vital. speed up!
parasympathetic=slow down vitals
both counteract each other to keep the body in check
found in the base of precentral gyrus involved with speech ability
when its damages people are mute
people have difficulty comprehending language when this part of the brain is damages
3 connective tissue membranes covering the CNS structures
double layered sac that anchors the Brain in place
holds the fluid inside
keeps the blood from contaminating the fluid inside
4 ways that the brain is protected:
blood brain barrier
central and peripheral nervous system
concerned with PNS
interpret incoming sensory information
conveys messages to the CNS
relay station for sensory information going to sensory cortex
regulates body temp, water balance, metabolism
controls skeletal muscle activity, balance, and equilibrium