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II Exam one
What is Anatomy?
The study of form or structure
Physiology is what?
The study of function
what are the 3 functions of the nervous system?
what do sensory functions do?
nervous tissue senses changes in the internal and external enviornments
what do integrative functions do?
brain and or spinal cord decide if a response is necessary
what do motor functions do?
produce a response
anatomically what two things make up the CNS?
anatomically, what two things make up the PNS?
physiologically, somatic nervous system is voluntary or involuntary?
physiologically, the autonomic nervous system is voluntary or involuntary?
physiologically, somatic nervous system inervates what?
physiologically, autonomi nervous system inervates what?
cardiac muscle, smooth muscle, and glands
) nervous system
) nervous system
What voltage is resting membrane potential?
what is the threashold voltage at wich and action potential is produced?
what is the voltage during hyperpolarization
when is the absolute refractory period?
when is the relative refractory period?
what are the sodium and potassium gate conditions at resting?
what are the sodium and potassium gate conditions at depolarization?
what are the sodium and potassium gate conditions at repolarization?
what are the sodium and potassium gate conditions at hyperpolarization?
potassium- remain open for a short period of time
a synapse is...
a junction between two neurons between a nueron and its effector
how is an electrical signal converted in a synapse?
electrical-> chemical-> electrical
excitatory neurotransmitters-drive the membrane potential
inhibitory neurotransmitters drive the membrane potential
what are the three possible fates of neurotransmitters?
1)may be broken down by an enzyme
2)may be taken back up by the synaptic end bulb and be reused
3)may defuse out of synaptic cleft and be lost