SMTB2

On what animal Hodgkin and Huxley registered and showed an action potential?

• squid

• elephant trunk
• mouse

• rabbit

At the resting state cell...

• The resting state cell has a positive resting membrane potential.
• The resting state cell is actively firing action potentials.
• The resting state cell is in a state of equilibrium with a negative resting membrane potential.
• The resting state cell is undergoing rapid cell division.

Negative membrane potential results from

• Unequal distribution of ions across the membrane
• High concentration of ions inside the cell
• Lack of ions across the membrane
• Equal distribution of ions across the membrane

Depolarised state is

• Higher negative membrane potential
• Less negative or positive membrane potential
• Neutral membrane potential
• Hyperpolarised state

Voltage-gated Na+ channels open on responce to

• Repolarization
• Depolarization
• Hyperpolarization
• Hypopolarization

Refractory period of VG Na+ channel ensures action potential is

• Unidirectional
• Nonexistent
• Bidirectional
• Inverted

What is the role of voltage-gated Na+ channels in action potential generation?

• Initiating depolarization

• Causing hyperpolarization

• Regulating repolarization

• Inducing hypopolarization