23/24 U4L2 Nerve impulse and action potential graph review

Identify each phase of the action potential: Resting potential prior to the impulse conduction.

Tags

NGSS.HS-PS2-5

Identify each phase of the action potential: Depolarization

Identify each phase of the action potential: Repolarization

Identify each phase of the action potential: Resting potential after repolarization of previous action potential.

Tags

NGSS.HS-PS2-5

Identify which pumps/channels are open or closed at each phase of the action potential.

d

b

c

a

Na+/K+ closed; Na+ open; K+ closed

Na+/K+ closed; Na+ closed; K+ open

Na+/K+ open; Na+ closed; K+ closed

Na+/K+ open; Na+ closed; K+ closed (2)

Organize these options into the right categories

Groups:

(a) Resting Potential

,

(b) Depolarization

,

(c) Repolarization

,

(d) Hyperpolarization to Resting potential

• K+ leaves the neuron.

• Na+ open

• +40 mV --> -75mV

• K+ pumps open

• -75mV --> -70 mV

• Na+ floods the neuron

• Na+/K+ pumps reopen maintaining 3Na+ outside to 2K+ inside the neuron

• meets threshold of -55mV

• back to rest awaiting another stimulus to occur.

• -70mv

• -55mV --> +40mV

• Caused by a stimulus

• Na+/K+ pumps open

• Prior to stimulus

part of a neuron that receives information from other neurons

• axon
• dendrites
• myelin sheath
• synapse

a signal molecule that transmits nerve impulses across synapses

• neuron
• neurotransmitter
• nerve
• action potential

When a neuron is resting, the inside of the axon has a ____________ charge.

• positive
• negative

Which ions are involved in the electrical nerve impulse?

• Iodine and Sodium
• Potassium and Sodium
• Iron and Sodium
• Calcium and Iodine

Tags

NGSS.HS-PS1-1