Asked by Karen Browne on May 22, 2024
Verified
Explain the difference between an absolute and a relative refractory period.
Absolute Refractory
A period immediately following the transmission of a nerve impulse when a neuron cannot be stimulated to transmit another impulse, regardless of the strength of the incoming signal.
Relative Refractory
A phase following the absolute refractory period during which a neuron or muscle cell requires a stronger than normal stimulus to respond.
Period
An interval of geologic time that is a subdivision of an era; each period is divided into epochs.
- Describe the phases of neuron action potential and the significance of refractory periods.
Verified Answer
LA
Lauren ArrambideMay 26, 2024
Final Answer :
Concepts to Consider: Absolute refractory period: during the time in which an axon membrane is depolarized, it cannot relay another neural impulse, no matter how strong of a stimulus is applied. Voltage-gated sodium channels are inactivated. Relative refractory period: time when sodium channels are at reset. Axon can transmit impulses, but the threshold level is higher.
Learning Objectives
- Describe the phases of neuron action potential and the significance of refractory periods.