Cell Transport Mechanisms in Biology

The video tutorial by Mr. Poser covers the topic of membrane transport in cells, focusing on diffusion, passive transport, and active transport. It explains how molecules move across the cell membrane, the role of concentration gradients, and the energy required for active transport. The video also discusses exocytosis and endocytosis, highlighting how cells import and export large molecules using vesicles.

What is the primary focus of topic 2.6 in the AP Biology course?

• Photosynthesis

• Membrane permeability

• Membrane transport

• Cellular respiration

Which process describes the movement of molecules from an area of high concentration to an area of low concentration?

• Osmosis

• Facilitated diffusion

• Active transport

• Diffusion

What term is used to describe the state when concentrations on either side of a membrane are equal?

• Homeostasis

• Equilibrium

• Balance

• Stability

How does passive transport differ from active transport?

• It involves vesicles

• It does not require energy

• It moves substances against the concentration gradient

• It requires energy

What molecule provides the energy needed for active transport?

• Glucose

• ATP

• NADH

• FADH2

Which of the following is an example of active transport?

• Pumping of sodium ions

• Diffusion of oxygen

• Osmosis of water

• Facilitated diffusion of glucose

What is the process called when a cell engulfs large particles by forming a vesicle around them?

• Endocytosis

• Pinocytosis

• Phagocytosis

• Exocytosis

Which type of endocytosis involves the intake of extracellular fluids?

• Facilitated diffusion

• Exocytosis

• Pinocytosis

• Phagocytosis

What is the role of vesicles in exocytosis?

• To break down waste products

• To store energy

• To transport molecules into the cell

• To secrete molecules out of the cell

Which cellular structure is primarily involved in the synthesis and transport of proteins and lipids?

• Mitochondria

• Lysosome

• Endoplasmic reticulum

• Golgi apparatus