Which of the Following Is True About the Movement of Ions

question 106

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

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Definitions:

Circulatory System

The body's system of blood vessels and organs that transports blood to and from the heart and transports nutrients, oxygen, carbon dioxide, and hormones throughout the body.

Excretes Waste

The process by which living organisms remove or expel waste materials from their bodies.

Hepatic Portal Vein

A blood vessel that carries blood from the gastrointestinal tract and spleen to the liver, rich in nutrients and toxins.

Nutrient-rich Blood

Blood that is high in oxygen and nutrients, supplied by the circulatory system to feed cells throughout the body.