What Occurs During the Refractory Period

question 278

Multiple Choice

What occurs during the refractory period?

• A) The neuron depolarizes.
• B) Neurotransmitters are released by the dendrites.
• C) The charge of the neuron's interior increases to about +60 millivolts.
• D) The neuron reestablishes the negative-inside/positive-outside condition.

---

Definitions:

Radially Symmetrical

An organism is described as radially symmetrical when its body structure can be sliced into symmetrical halves through any number of planes along its center.

Water Vascular System

Unique hydraulic system of echinoderms; functions in locomotion and feeding.

Echinoderms

A phylum of marine animals including starfish, sea urchins, and sea cucumbers, characterized by radial symmetry and a water vascular system.

Digestive System

A collection of organs that breaks down food into nutrients, which the body uses for energy, growth, and cell repair.