Cell Membrane and Homeostasis Quiz

What is the main learning target of the video?

• To explore the functions of mitochondria

• To learn about the history of cell theory

• To identify and explain how the cell membrane components help maintain homeostasis

• To understand the structure of DNA

Which of the following is NOT a name for the cell membrane?

• Fluid mosaic model

• Nuclear envelope

• Phospholipid bilayer

• Plasma membrane

What is the primary function of the cell membrane?

• To store genetic information

• To maintain homeostasis by controlling entry and exit of substances

• To synthesize proteins

• To produce energy for the cell

What are the two main parts of a phospholipid?

• Hydrophilic head and hydrophobic tails

• Hydrophobic head and hydrophilic tails

• Carbohydrate head and protein tails

• Protein head and lipid tails

What is simple diffusion?

• Movement of molecules from low to high concentration

• Transport of molecules through vesicles

• Transport of molecules using energy

• Movement of molecules from high to low concentration without energy

How does cholesterol affect the cell membrane?

• It makes the membrane rigid

• It decreases the membrane's thickness

• It makes the membrane more fluid and flexible

• It increases the permeability of the membrane

What is the main role of transport proteins in the cell membrane?

• To store energy

• To help transport materials in and out of the cell

• To synthesize lipids

• To provide structural support

What is facilitated diffusion?

• Transport of molecules using energy

• Movement of molecules from low to high concentration

• Movement of molecules from high to low concentration with the help of transport proteins

• Transport of molecules through vesicles

Which molecules cannot pass through the phospholipid bilayer without assistance?

• Small non-polar molecules

• Large molecules like glucose and charged ions

• Water molecules

• Oxygen molecules

What is the function of glycoproteins in the cell membrane?

• To transport molecules

• To help cells recognize each other

• To provide energy

• To synthesize proteins