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What is resting membrane potential

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Polarized cell membrane due to negatively charges inside (proteins) and positive charge outside (sodium)

High Na extracell, high K intra, negatively charged proteins remain intra 

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Type of conduction that occurs in unmyelinated axon

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continuous

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What is polarization

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Uneven distribution of charge in the extracellular and intracellular of a cell membrane

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What channel is used in diffusion

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Leak Channels

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Type of conduction that occurs in myelinated axon

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saltatory

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What is continuous conduction

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Continuous conduction occurs when a part of a cell membrane conducts action potential and stimulates the adjacent part (katabi) to conduct action potential as well. 

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what part of neuron carries impulses away from the cell body

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axon

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Why is it important to reach the threshold value of the local potential?

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In order for action potential to occur. Otherwise, the cell membrane goes back to its resting potential.

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Illustrate the mechanism of reflex arc

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sensory receptors detect stimuli -> action potential produced -> sensory neurons conduct action potential to the spinal cord -> synapse with interneurons -> synapse with motor neurons -> motor neurons conduct action potential to the effector organ -> reflex 

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what are the 5 components of reflex arc

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1. sensory receptors

2. sensory neurons

3. interneurons

4. motor neurons

5 effector organ

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Illustrate the mechanism of action potential

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stimuli -> gated channels activated -> increased cell membrane permeability -> opening of voltage-gated Sodium channels -> increased permeability to sodium -> depolarization -> opening of voltage-gated Potassium channels -> increased permeability to potassium -> repolarization -> hyperpolarization -> go back to resting membrane potential

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How does sodium potassium pump work?

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More K+ leakage channels -> K+ diffuses out of the cell at a faster rate -> Higher concentration of Na+ inside the cell -> Higher concentration of K+ outside the cell -> high Na out, high K inside must be attained back -> sodium potassium pump pumps 3 Na+ out in exchange for 2 K+ in -> high Na out, high K inside is achieved -> negative charge inside is achieved -> maintained polarization -> homeostasis -> maintained resting potential

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Q:

What is resting membrane potential

A:

Polarized cell membrane due to negatively charges inside (proteins) and positive charge outside (sodium)

High Na extracell, high K intra, negatively charged proteins remain intra 

Q:

Type of conduction that occurs in unmyelinated axon

A:

continuous

Q:

What is polarization

A:

Uneven distribution of charge in the extracellular and intracellular of a cell membrane

Q:

What channel is used in diffusion

A:

Leak Channels

Q:

Type of conduction that occurs in myelinated axon

A:

saltatory

Mehr Karteikarten anzeigen
Q:

What is continuous conduction

A:

Continuous conduction occurs when a part of a cell membrane conducts action potential and stimulates the adjacent part (katabi) to conduct action potential as well. 

Q:

what part of neuron carries impulses away from the cell body

A:

axon

Q:

Why is it important to reach the threshold value of the local potential?

A:

In order for action potential to occur. Otherwise, the cell membrane goes back to its resting potential.

Q:

Illustrate the mechanism of reflex arc

A:

sensory receptors detect stimuli -> action potential produced -> sensory neurons conduct action potential to the spinal cord -> synapse with interneurons -> synapse with motor neurons -> motor neurons conduct action potential to the effector organ -> reflex 

Q:

what are the 5 components of reflex arc

A:

1. sensory receptors

2. sensory neurons

3. interneurons

4. motor neurons

5 effector organ

Q:

Illustrate the mechanism of action potential

A:

stimuli -> gated channels activated -> increased cell membrane permeability -> opening of voltage-gated Sodium channels -> increased permeability to sodium -> depolarization -> opening of voltage-gated Potassium channels -> increased permeability to potassium -> repolarization -> hyperpolarization -> go back to resting membrane potential

Q:

How does sodium potassium pump work?

A:

More K+ leakage channels -> K+ diffuses out of the cell at a faster rate -> Higher concentration of Na+ inside the cell -> Higher concentration of K+ outside the cell -> high Na out, high K inside must be attained back -> sodium potassium pump pumps 3 Na+ out in exchange for 2 K+ in -> high Na out, high K inside is achieved -> negative charge inside is achieved -> maintained polarization -> homeostasis -> maintained resting potential

Nervous System

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