KIN 372 Neurons Notes PDF

NEURONS Anatomy Label the parts of a neuron. What is the function of each part? Soma : Synthesizes materials for neuron survival dendrites : receive information...

NEURONS Anatomy Label the parts of a neuron. What is the function of each part? Soma : Synthesizes materials for neuron survival dendrites : receive information axon : sends information mydin sheath : Faster conduction sheath. Gaps in mydin result conduction in saltitory information transfer between synapse 2 : neurons dendrites soma/cellbody axon elin my sheath nodes of Ranvier Synapse What is the function of each part? 1  for function neurons are designed Types of Neurons Describe how the motor neuron is designed for function. Describe how the sensory neuron is designed for function. 2 axons - 1 receives info - 1 sends info out Describe how the interneuron is designed for function. dendrites & axons many connects everything together Describe how the Purkinje cell is designed for function. located in cerebellum out only I axon to send signal (supporting) What do Glial cells do? h G Schwann Cells are where and what is their specific function? - (PNS) · Oligodendrocytes are where and what is their specific function? (CNS) function blood brain barrier & A other supporting cells provide immune a astrocytes - 2 Action Potential of rest What is the definition of Resting Potential? charge neuron o What molecule is on the outside of the cell? Nata() + What molecule is on the inside of the cell? k What happens if there is a hole in the membrane? K" flow in a Nat flow out What forces drive these molecules to want to move? charges What is the general function of ion channels? provides very fine control over Ap voltage gated KT + Nat play large role in AP located along entire neuron - has to be change in voltage for gate to open Typical resting potential is _________ 70mU - because? a imbalance of electrons resting potential , some " channels...... Explain what happens during an action potential –depolarization, repolarization, and hyperpolarization. What type of channels mediate each step? threshold potential voltage : reaches certain What causes an action potential? level createsan Gdepolarization potential What is the refractory period? Not flows making : in at charge voltage gated , K channels begin to open action refractory repolarization : K flows out reversing charge potential period making it more - Nat channels begin to close hyperpolarization : Na-k pump......... voltage gated K+ channels open depolarization repolarization voltage gated Nat channels close voltage gated Nat channels -50mV open threshold potential resting potential graded potential sodium-potassium pump resting potential hyperpolarization no during g AP 3