2.9 Cell Membrane and Transport Video

What cellular organelle helps maintain homeostasis?

• Cell wall

• Ribosome

• Cell Membrane

• Nucleus

Tags

NGSS.HS-LS1-3

Homeostasis is wh​ere cells keep a stable internal environment.​ ​ (a)  

• True
• False

Tags

NGSS.HS-LS1-3

A phospholipid bilayer consists of two layers of carbohydrates.

• True

• False

The cell membrane allows any type of molecule to pass through.

• True

• False

Does simple diffusion require any energy (ATP) to move molecules across the cell membrane?

• Yes

• No

When molecules go from a high concentration to a low concentration, what is called?

• Going against the flow, or against the concentration gradient.

• Going with the flow, or with the concentration gradient.

If a molecule is too big or polar (charged), what helps it cross the cell membrane?

• Vacuoles in the cell membrane

• Cholesterol in the cell membrane

• Proteins in the cell membrane

• Endoplastic Reticulum

Facilitated diffusion through proteins in the cell membrane is considered what type of transport?

• Active Transport

• Passive Transport

• Osmosis

• Endocytosis

Facilitated diffusion goes against the concentration gradient.

• True

• False

What are the protein channels called that transport water molecules?

• Water pumps

• Water transporters

• Aquaporins