In Da Club - Membranes & Transport: Crash Course Biology

The video explains how substances move through cell membranes, highlighting the importance of selective permeability. It covers passive transport, including diffusion and osmosis, and active transport, focusing on ATP and the sodium-potassium pump. The video also discusses vesicular transport, including endocytosis and exocytosis, and their roles in cellular function.

What is the primary function of a cell membrane?

• To produce proteins

• To selectively allow substances in and out

• To provide energy to the cell

• To store genetic information

Which of the following is an example of passive transport?

• Diffusion

• Endocytosis

• Exocytosis

• Sodium-potassium pump

What happens to a cell in a hypertonic solution?

• It swells and bursts

• It remains unchanged

• It shrinks

• It becomes isotonic

What is the role of ATP in active transport?

• It acts as a solvent

• It provides energy

• It forms the cell membrane

• It stores genetic information

Which protein is crucial for active transport in cells?

• Sodium-potassium pump

• Hemoglobin

• Collagen

• Aquaporin

What is the main function of vesicular transport?

• To produce ATP

• To transport materials in and out of the cell

• To synthesize proteins

• To replicate DNA

Which process involves vesicles releasing their contents outside the cell?

• Exocytosis

• Endocytosis

• Osmosis

• Diffusion

What is phagocytosis?

• The release of neurotransmitters

• The active transport of ions

• The diffusion of water across a membrane

• The process of a cell engulfing large particles

How do cells absorb nutrients dissolved in fluid?

• Exocytosis

• Pinocytosis

• Phagocytosis

• Diffusion

What is receptor-mediated endocytosis used for?

• To release neurotransmitters

• To engulf bacteria

• To absorb specific molecules

• To transport water