When a Neuron Is Activated by a Threshold Stimulation, _________

question 45

Multiple Choice

When a neuron is activated by a threshold stimulation, _________ channels open, which allows these ions to quickly

• A)sodium ion; diffuse into the neuron.
• B)sodium ion; diffuse out of the neuron.
• C)potassium ion; diffuse into the neuron.
• D)potassium ion; diffuse out of the neuron.

---

Definitions:

Cervical

Relating to the neck or the cervix, which is the lower part of the uterus opening into the vagina.

Thoracic

Pertaining to the chest region in vertebrates, containing vital organs such as the heart and lungs.

Lumbar

Referring to the lower back region of the spine, encompassing the five vertebrae between the rib cage and the pelvis.