The Amazing World of Cells and Microbes

The video explores the complexity of human cells, highlighting that humans are composed of trillions of cells, including a significant number of microbial cells. It delves into the fundamentals of cell theory, emphasizing that cells are the basic unit of life and all living things are made of cells. The video explains the functions of cells and their organelles, comparing them to human organs. It also discusses DNA's role in cell specialization and differentiation, leading to the formation of tissues and organs. The importance of treating our cells well for health and learning is underscored.

What percentage of the cells in the human body are red blood cells?

• 50%

• 70%

• 90%

• 30%

What is the significance of microbial cells in the human body?

• They are irrelevant to human health

• They are harmful to humans

• They help maintain health as part of our ecosystem

• They are only found in the digestive system

What is the basic unit of life according to cell theory?

• Organ

• Tissue

• Cell

• Organism

Which of the following is an example of a multicellular organism?

• Bacteria

• Portuguese Man of War

• Amoeba

• Yeast

Which of the following is NOT a function that cells need to perform?

• Process energy

• Reproduce

• Remove wastes

• Photosynthesize

How do cells in plants produce energy?

• By absorbing sunlight directly

• Through photosynthesis

• Through cellular respiration

• By consuming other organisms

What are organelles?

• Small structures inside the cell with specialized functions

• Microbial cells in the body

• Cells that form tissues

• Large organs in the body

What is the role of the nucleus in a cell?

• To protect the cell

• To store DNA instructions

• To produce energy

• To remove waste

What is the function of the cell membrane?

• To remove waste

• To store genetic information

• To protect the cell

• To produce energy

What process allows stem cells to become specialized?

• Cell division

• Cell differentiation

• Photosynthesis

• Cell respiration