3 divisions of CNS
Autonomic nuclei of SNS and PSNS innervates what 3 things.
Organs (not under out control)
Peripheral Nervous System (PNS) includes all the neural tissue outside the ______.
______ are sensory structures that detect changes in the internal or external environment.
The _______ ________ of the PNS brings information to the CNS from receptors in peripheral tissue and organs.
Information processing includes the ______ and _______ of information in the CNS
The ______ ________ of the PNS carries motor commands from the CNS to peripheral tissues and systems.
Somatic NS controls _____ muscle contractions
(Per Image from slides). ANS provides autonomic regulation of what 4 components? Travis only listed 3.
Smooth muscle Cardiac muscle Glands Adipose
______ are target organs who activities change in response to neuronal commands.
Somatic NS includes both receiving ____information and relaying _____ commands to muscles.
Cell body of a neuron.
______ receive information and transmit to the cell body. (part of neuron)
"Functional unit" of a neuron. Carries response of a neuron in the form of a propagated action potential.
Supports and insulate axon Supply metabolites and distribute neurotransmitters
Segments of neuron that do not contain myelin? Responsible for conduction propagation thru _____ channels.
Nodes of Ranvier Sodium
Why are nodes of ranvier thought to be the site of action of local anesthetics.
No myelin sheet means limited diffusion barriers for locals to get into the axon.
Nodes of Ranvier are responsible for _____ conduction.
(neuron component) Releases electric signal from presynaptic cell. Synapse with effector cell or another nerve cell.
Space between axon terminal and dendrite (pre and post-synaptic area).
(PNS components) Surrounds perineurium Composed of connective tissue and holds fascicles together.
(PNS components) Connects tissue which surrounds each nerve fiber fascicle.
(PNS components) Surrounds and embeds axon within the fasciculi.
A bundle of axons together
Epineurium, perineurium and endoneurium are all types of _______ tissue that function as _____ in which local anesthetics must diffuse through in order to get to specific axons of neurons.
Which is a myelinated vs unmyelinated and label the parts.
b. unmyelinated (all purple is single schwan cell)
A. Node of Ranvier
C. Myelin Sheeth
(Unmyelinated nerve) A single _____ cell covers several axons in a bundle.
(Large Nerves) The schwann cells cover a single axon and form several layers of the liquid ______.
Compared to unmyelinated nerves, myelinated nerves are...
Conduct impulses faster
More difficult to block with locals
Myelinated nerves work by ______ conduction.