Neurophysiology Block 2

All of these are functions of the Nervous system except?

A. Controls by electric impulses
B. Controls release of hormones
C. Rapid Response
D. Stimulate muscle movements

All Graded Potentials cause action potentials?

A. True
B. False

What is not a characteristic of Graded Potentials?
A. Short lived
B. Hyperpolarization
C. Depolarization
D. Magnitued of a voltage change is proportional to the strength of the stimulus
E. Repolarization

Leaky channels open and close in neurons?

A. True
B. False

Depolarization is created by?

A. Stimulating K+ channels
B. Stimulating Na+ channels
C. Neither

What is the Threshhold Voltage? (Number)

During Repolarization in an Action Potential, does?

A. Sodium Permeability increase
B. K Permeality increase
C. Both

During Repolarization in an Action Potential, Does?

A. Sodium Permeability increase
B. K Permeability Decrease
C. Both

During Depolarization in an Action potential, Does?

A. Voltage Gated Na+ Ions open
B. Voltage Gated K+ Ions open
C. Both

Hyperpolarization has an what type of effect to membrane?

A. Inhibitory
B. Excitatory
C. None

Graded Potentials apply to all or nothing principle?

A. True
B. False

"An Action potential cannt be generated no matter how hard of fast you stimulate the neuron" this applies to?

A. Absolute Refractory Period
B. Relative Refractory period

Input zone of neuron includes which of thes structures?

A. Soma
B. Axon Hillock
C. Dendrites
D. A & B
E. A & C

Where are neurotransmitters specifically stored?

A. Synaptic End bulbs
B. Axon terminals
C. Collaterals
D. Synaptic Vesicles

Which type of neurons are most abundant?

A. Multipolar
B. Bipolar
C. Unipolar

Which type of neurons are most rare?

A. Multipolar
B. Bipolar
C. Unipolar

Which type of neuron is found in the posterior dorsal root ganglia?
A. Multipolar
B. Bipolar
C. Unipolar

Which type of neuron is functionally Afferent (Sensory)?

A. Multipolar
B. Bipolar
C. Unipolar

Effector (Motor) neurons and Interneurons are structurally classified as?
A. Multipolar
B. Bipolar
C. Unipolar

What type of cell is called "Nerve Glue"

Astrocytes do all of these except?

A. Form Blood Brain Barrier
B. Control Chemical Environment around neurons
C. Help neuron development in fetal brain
D. Transform into a macrophage

Which type of Neuroglial Cell is associated with Ciliate?

A. Astrocyte
B. Microglia
C. Ependymal cell
D, Oligodendrocyte
E. Shwann Cell

Which type of Neuroglial Cell is associated with myelin sheaths? (more than one)

A. Astrocyte
B. Microglia
C. Ependymal
D. Oligodendrocyte
E. Schwann Cell

What are the gaps called between the myelin sheaths?

Myelin sheath mostly covers axons but does cover some dendrites. Where are these myelinated dendrites located?

A. Sensory neurons in PNS
B. Sensory neurons in CNS

In the CNS, a myelin sheath is produced by?

A. Oligodendrocyte
B. Schwann Cell
c. Astrocyte

There is neurilemma in the CNS neurons?

A. True
B. False

Oligodendrocytes divide to forma a tube to guide axon growth and produce growth-promoting chemicals?

A. True
B. False

Which myelin sheath producing cell is the "jelly roll" type?

Saltatory conduction is describe by all except?

A. Slower conduction
B. Impulses jumos voe sections of the fibe coverd with insulating myelin
C. Conduction speeds at 100m/sec

What is it called when a neurotransmitter is released at the Chemical Synapse?

What are the 3 ways a neurotransmitter is Terminated?

A. Enzymatic Degradation
B. Macrophage engulfs chemical
C. Reuptake into the presynaptic membran
D. Diffusion of the neurotransmitter away from the cleft

Calcium gates open in the post-synaptic terminal.

A. True
B. False

EPSP's are:

A. Excitatory
B. Inhibitory

A single EPSP cannot induce an action potential in the postsynaptic neuron

A. Ture
B. False

Saptial summation is EPSP's occuring at the same time?

A. True
B. False

Temporal Summation- EPSP's are not closer together, but not at the same time

A. True
B. False

All relate to acetylcholine except:

A. First and most studied Neurotransmitter
B. Released by many PNS neurons & some CNS neurons
C. Synthesized from Amino Acids
D. Its an excitatory neurotransmitter

Biogenic amines include:

A. Sertonin
B. Histamine
C. Noraepinephrine
D. None of these

Idolamines include:

A. Dopamine
B. GABA
C. Acetylcholine
D. Histamine

GABA is chemically classified as?

A. Catecholamine
B. Idolamine
C. Amino Acid

Peptides are described by all the following except?

A. chain of amino acids
B. same binding spot as morphine
C. Natural opiate
D. All of the above describe Peptides

All of these Neurotransmitters are both excitatory and inhibitory except?

A. Ach
B. NE
C. GABA
D. Serotonin

Indirect neurotransmitters, ones that use secondary messenger molecules have longer lasting effects?

A. True
B. False

Ligand gated ion channels are part of the which process?

A. Channel-linked receptors
B. G Protein receptor

In regards to blocking Nerve impulse transmissions, Cyanide affects?

A. Presynaptic Neuron
B. ATP producing pump
C. Post synaptic Neuron

Presynaptic Neurons are affected by?

A. Cocaine
B. Caffeine & Nicotine
C. Curare
D. Cyanide

Post synaptic neurons are blocked by all except?

A. Caffeine and Nicotine
B. Botulinum Toxin
C. Curare
D. Strychnine