Which of the Following Is True About the Movement of Ions

question 34

Multiple Choice

Which of the following is true about the movement of ions across excitable living membranes?

• A) Ions always move actively across membranes through leakage channels.
• B) Sodium gates in the membrane can open in response to electrical potential changes.
• C) Ions always move from an area of higher concentration to an area of lower concentration.
• D) Ions always move passively across membranes.

---

Definitions:

Menstrual Period

A monthly cycle in individuals with a uterus where the lining of the uterus is shed if pregnancy does not occur, typically resulting in bleeding.

LMP

Last Menstrual Period, the date of the first day of a woman's most recent menstrual cycle, used in calculating gestational age.

Pap Smear

a screening procedure for cervical cancer, involving the collection of cells from the cervix.

Epithelial Cells

Cells that line the surfaces of the body, including the skin, blood vessels, organs, and cavities, playing roles in protection, absorption, and secretion.