active transport

• What is the main function of active transport in cells?

  To move substances against a concentration gradient
• Why is active transport important for cells?

  It allows cells to absorb necessary substances from dilute solutions
• What health issue is associated with cystic fibrosis related to active transport?

  Problems with active transport systems lead to thick, sticky mucus
• What are the two main ways substances move in and out of cells?

  Diffusion and active transport
• How do substances move by diffusion?

  They move down a concentration gradient
• What is required for active transport to occur?

  Energy from respiration
• What does active transport allow cells to absorb from dilute solutions?

  Minerals and nutrients
• Why do cells that perform a lot of active transport have many mitochondria?

  Because mitochondria provide the energy needed for active transport
• How does active transport benefit plants?

  It allows them to absorb mineral ions from dilute soil solutions
• How does active transport help in the absorption of glucose in the gut?

  It moves glucose from the gut into the blood against a concentration gradient
• What is the relationship between the rate of active transport and the rate of respiration?

  The rate of active transport is closely linked to the rate of respiration
• What is the significance of salt glands in marine birds like albatrosses?

  They help remove excess salt from the body against a concentration gradient
• What are the key points about active transport?

  • Moves substances from dilute to concentrated solutions (against a gradient)
  • Uses energy from respiration
  • Allows plants to absorb minerals from soil
  • Enables glucose absorption in the gut
• What is the concentration gradient direction for active transport?

  From lower concentration to higher concentration
• Why is it important to refer to movement as "against a concentration gradient" for active transport?

  It clarifies that energy is required to move substances in this direction
• What type of cells have many mitochondria due to high active transport needs?

  Root hair cells and gut cells
• How do crocodiles utilize active transport in their salt glands?

  They remove excess salt from their bodies against a concentration gradient
• What happens to the concentration of glucose in the blood compared to the gut?

  The concentration of glucose in the blood is lower than in the gut
• What is the role of active transport in kidney tubules?

  It helps in the reabsorption of glucose from urine back into the blood
• What is the main energy source for active transport?

  Energy released from food during respiration
• Why is it crucial for plants to absorb mineral ions against a concentration gradient?

  Mineral ions are essential for healthy growth