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Audrey S

Anatomy Study Stack Week 6-12

QuestionAnswer
Schwann cells only found in peripheral neurons Support nerve fibers and form myelin sheaths
What are neurons Excitable cells that initiate and conduct impulses
mitochondria provides energy (ATP) for neurons; some are transported to end of axon
dendrites each neuron has one or more dendrites
enteric nervous system regulates digestive function
what are two types of synapses electrical and chemical
action potential nerve impulse
local potential slight shift away form the resting membrane in a specific region Graded potentials are also local potentials
dura mater strong white fibrous tissue Outer layer of meninges
meninges 3 membranous layers - dura mater, arachanoid mater and pia mater
CSF provides a supportive, protective cushion Reservoir of circulating fluid that is monitored by the brain to detect changes in the internal environment
spinal cord 2. Bulges cervical and lumbar region
cauda equina bundle of nerve roots extending from the conus medullaris
2 functional divisions of PNS afferent (sensory) efferent (motor)
Somatic reflex contraction of skeletal muscles
autonomic reflex (visceral) contraction of smooth or cardiac or secretion by glands
4 major plexus cervical, brachial, lumbar, sacral
dermatomes sensory(spinal)afferent
myotome skeletal(motor)efferent
Hematopoiesis formation of new blood cells
hemostasis stops bleeding
platelets adhere to damaged endothelial lining
3 layers of the heart epicardium, myocardium, pericardium
SA node is also known as the pacemaker
Thymus primary organ of the lymphatic system Secretes thymosin and other regulators which enables lymphocytes to develop into T cells
lymphatic system drains away excess water from large areas Maintains fluid balance
surfactant a component of the fluid coating the respiratory membrane that reduces surface tension; produced by type II cells
Created by: Audrey S
 

 



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