primrose kitten videos

• What is the purpose of the cell membrane in a plant cell?

  Controls what goes in and out
• What is the function of the cell wall in a plant cell?

  Provides structure
• What is the role of ribosomes in a cell?

  Responsible for protein synthesis
• What do chloroplasts do in plant cells?

  Involved in photosynthesis
• What is the function of mitochondria?

  Produces energy
• Where is the nucleus located in a cell?

  Controls center of the cell
• What are the main differences between plant and animal cells?

  Plant cells have cell wall, vacuole, chloroplasts
• What is the structure of a bacterial cell?

  Has cell membrane, cytoplasm, chromosome
• What is the role of stem cells?

  Can differentiate into any cell type
• What happens during differentiation?

  Cells specialize by turning genes on/off
• What is the formula for magnification?

  Magnification = image height / object height
• What is DNA made of?

  Long strand of deoxyribonucleic acid
• What is the structure of DNA?

  Twists into a double helix
• What occurs during mitosis?

  One parent cell divides into two identical cells
• What is the role of chromosomes during mitosis?

  DNA condenses into chromosomes for division
• What are the uses of stem cells?

  Can treat diseases like Parkinson's
• What is diffusion?

  Movement from high to low concentration
• What is osmosis?

  Movement of water through a membrane
• What is active transport?

  Movement from low to high concentration
• What is the difference between tissue, organ, and organ system?

  • Tissue: One type of cell performing a function
  • Organ: Multiple cell types working together
  • Organ System: Group of organs working together
• What are the main components of the digestive system?

  • Mouth: Mechanical breakdown of food
  • Salivary glands: Produce amylase
  • Liver: Produces bile
  • Stomach: Digests food with acid
  • Small intestine: Absorbs nutrients
  • Large intestine: Removes excess water
• What does lipase do?

  Breaks down fats into fatty acids
• What does protease do?

  Breaks down proteins into amino acids
• What does amylase do?

  Breaks down starch into sugars
• How do enzymes work?

  Form enzyme-substrate complexes to catalyze reactions
• How does temperature affect enzyme activity?

  Enzymes denature at high temperatures
• What happens to enzymes at optimal pH?

  They function effectively at their peak pH
• What is the function of the respiratory system?

  Facilitates gas exchange in the body
• What is the pathway of air in the respiratory system?

  Mouth/nose → trachea → bronchi → alveoli
• What is the role of the diaphragm?

  Moves up and down to aid breathing
• What is the cardiovascular system's function?

  Pumps blood throughout the body
• What is the pathway of blood through the heart?

  Vena cava → right atrium → right ventricle
• What is the function of valves in the heart?

  Prevent backflow of blood
• What is the difference between arteries and veins?

  Arteries carry oxygenated blood; veins carry deoxygenated blood
• What is blood made up of?

  Red blood cells, white blood cells, platelets, plasma
• What causes cardiovascular disease?

  Fatty deposits in coronary arteries
• What can happen if blood clots block arteries?

  Can lead to heart attacks
• What are risk factors for cardiovascular disease?

  Smoking, high blood pressure, high salt/fat diet
• What is the liquid component of blood called?

  Plasma
• What is the main function of red blood cells?

  To carry oxygen