Questions and Answers
What type of transport is diffusion?
What direction do molecules move during osmosis?
High to a low concentration
Facilitated diffusion requires energy.
False
What is necessary for facilitated diffusion?
Signup and view all the answers
What type of transport is a protein pump?
Signup and view all the answers
Phagocytosis is often referred to as _____ because it involves 'cell-eating.'
Signup and view all the answers
During receptor-mediated endocytosis, substances move in what direction?
Signup and view all the answers
What is the primary function of exocytosis?
Signup and view all the answers
Pinocytosis is a form of 'cell-drinking.'
Signup and view all the answers
Study Notes
Cell Transport
-
Diffusion
- Passive transport mechanism
- Small nonpolar molecules (e.g., oxygen, carbon dioxide) pass directly through the cell membrane
- Movement occurs from high to low concentration
- No energy or proteins required
-
Osmosis
- Passive transport specifically for water
- Water moves across the cell membrane from high to low concentration
- Requires no energy or proteins
-
Facilitated Diffusion
- Passive transport helped by carrier proteins
- Moves substances like polar molecules (e.g., water) and ions (e.g., salts) down their concentration gradient
- Direction is from high to low concentration
- Does not require energy, but proteins are necessary
-
Protein Pump
- Active transport via carrier proteins using energy
- Moves substances against their concentration gradient from low to high concentration
- Energy and proteins are required
-
Receptor Mediated Endocytosis
- Active transport mechanism involving receptor proteins
- Specific substances bind to receptors, triggering endocytosis
- Direction of movement from low to high concentration
- Requires energy and proteins
-
Phagocytosis
- Active transport process also known as "cell-eating"
- Cells engulf solid materials using vesicles
- Movement is from low to high concentration
- Energy required, but proteins are not needed
-
Pinocytosis
- Active transport process also known as "cell-drinking"
- Cells take in liquids via vesicles
- Direction of transport is from low to high concentration
- Requires energy without the need for proteins
-
Exocytosis
- Active transport mechanism for expelling substances
- Waste and hormones are secreted from the cell
- Movement occurs from low to high concentration
- Requires energy but no proteins are needed
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Explore the various methods of cell transport including diffusion, osmosis, facilitated diffusion, and active transport mechanisms like protein pumps. This quiz covers how these processes function and their importance in cellular behavior. Test your understanding of how substances move across cell membranes!
