Nerve and Glial Cells
What do Nerve cells do
Neurons receive, process, and transmit info to, from, and within the nervous system.
What is the nervous system
Regulates voluntary and involuntary movements and organ function
What are the structures of the NS
Peripheral: Cranial, spinal nerves, and sensory receptors
Central: brain, brain stem, spinal cord
What is the meniges? and what are the layers?
Protective system of tissue and fluid surrounding brain and spinal cord. Outermost: Dura mater, arachnoid mater, innermost is pia mater
Soma, Dendrites and axons
What are the four regions of the brain
Cerebrum: transmits info, controls higher function
Cerebellum: muscle movement, balance and posture
Brain stem: anchors brain to spinal cord
Diencephalon: Produces chemicals and feelings
What are the functions of the NS
Somatic and Autonomic
What is CSF
It is in the subarachnoid space, produced in ventricles, it contains protiens and glucose. Circulates to protect brain and buoyancy
What are the three ways to classify nerve cells
Number of process, unipolar, bipolar, multipolar
Function, Motor (Efferent) and Sensory (afferent)
Type of neurotransmitter: Dopaminergic, Chlolinergic, serotonergic
Dendrite
Conducts impulses towards the cell body, receives signals.
Function of the CNS
Information processing, interpreting incoming sensations, planning, organizing. Receives info from PNS
How are the Ventricles connected?
Lateral Ventricles connect to the third by the interventricular formen, the third to the fourth by cerebral aqueduct.
What are Glial Cells
Metabolic support cells, brings nutrients to nerve cells and cleans up waste
Synapse
Gap between neurons that allows chemical and electrical signals to cross
Function of PNS
Sends and receives info from CNS. Receives info from sensory receptors and sends to CNS. Final common pathway.
Where is the Cerebrospinal Fluid made
It is made in the ventricles by the choroid plexus cells
How are sodium, potassium, and chloride related to nerve cells
Sodium and potassium are positive, chloride is negative, they move in and out of the cell. Creating resting or action potential.
Axons