CBNS 106 Lecture Notes - Lecture 7: Chemical Synapse, Axon Terminal, Adenylyl Cyclase

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savvysmiles

26 Oct 2021

School

UC Riverside

Department

Cell Biology and Neuroscience

Course

CBNS 106

Professor

Fiacco Todd

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Document Summary

Proqs-s-eieas. it: in the pre - synaptic term . Nt release: nt cross the synaptic cleft. & bind to the receptors on the post - synaptic side . types of synapse"s. Synaptic delay the synaptic vesicle docked and ready to be released. T1 before ap ( -65mv) axo - somatic : presynaptic axon synapses with postsynaptic soma (cid:8869) if formed closest to the soma = produce isp"s. T2 the ap arrives and the membrane potential is -65mv . Cv axo - atonic : one axon synapses onto another opening the ca. Channel and caat to flow into the cell. 1 influx) , thus a the mechanism for pre -synaptic inhabit on / facilitation concentration of caat near the vesicles. T3 ca - + flows in due to a driving force and fuse to the pre syn . membrane & yore out than in. T4 the vesicle membrane becomes apar t of the terminal membrane.

Related Questions

1.A stronger stimulus to a neuron results in ________.

A. larger voltage changes in graded potentials and greater frequency of action potentials produced in response

B. greater frequency of graded potentials and larger voltage changes in the action potentials produced in response

C. larger voltage changes in the graded potentials, but no changes in action potentials

D. larger voltage changes in both graded and action potentials

E. larger voltage changes in graded potentials but smaller action potentials

2. Why is it more difficult to fire an action potential when the interval between stimuli decreases?

A. because sodium is flowing out of the cell

B. because potassium is flowing into the cell

C. because some sodium channels may still be in an inactivated state

D. because chloride is flowing into the cell

E. because chloride is flowing out of the cell

3. As an action potential zips down an axon,

A. voltage gated potassium channels open first followed by voltage-dependent sodium channels

B. voltage- gated sodium channels ahead of the wave and not yet activated are influenced by the depolarizing electrical field of other nearby sodium channels

C. voltage-gated potassium channels ahead of the wave and not yet activated are influenced by the depolarizing electrical field of nearby sodium channels

D. leak channels are opened by the wave of electricity passing along the axon

E. B and C

In order for Neurons to communicate, Resting Membrane Potential must CHANGE. Examples of changes in Membrane Potential included Graded Potentials and Action Potentials. In order for there to be a change in membrane potential, ions must move across the plasma membrane. There are THREE Primary types of Ion Channels: Passive (Leak) Channels, Voltage-gated Channels and Chemically-gated Channels.

DIRECTIONS

Indicate which voltage-gated channels are functioning during each phase of an Action Potential

skyhorse437

DIRECTIONS

Select ONE type of Ion Channel and indicate whether that Ion Channel is MOST important for producing Resting Membrane Potential, Graded Potentials or Action Potentials. Provide detailed support for your choice.

purpleweasel693

CBNS 106 Lecture Notes - Lecture 7: Chemical Synapse, Axon Terminal, Adenylyl Cyclase

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