Cell Theory
What is the basic unit of life?
The cell
Which organelle controls cell activities?
The nucleus.
What is the correct order: tissue, cell, system, organism, organ?
Cell → tissue → organ → system → organism
Which system delivers oxygen to the body?
The respiratory system.
What is diffusion?
The movement of particles from high to low concentration.
Name one healthy lifestyle choice.
Eating balanced meals, exercising, not smoking, etc.
True or False: All cells come from pre-existing cells.
True
Which organelle provides energy for the cell?
Mitochondria.
What is a group of similar cells working together called?
A tissue.
Which organ pumps blood throughout the body?
The heart.
What is osmosis?
The movement of water through a membrane from low to high concentration.
What kind of disease can damage the respiratory system?
Asthma or lung infections like pneumonia.
Name all three parts of the cell theory.
1) All living things are made of cells
2) The cell is the basic unit of life
3) All cells come from pre-existing cells.
Name two organelles that are only found in plant cells.
Cell wall and chloroplast.
Give an example of a specialized structure in an animal and its function.
A bird's beak for catching insects, or a human stomach for digesting food.
Which two systems work together to break down and transport nutrients?
Digestive and circulatory systems.
Is osmosis a type of active or passive transport?
Passive transport.
How can pollution affect the body?
Dirty air or water can harm the lungs, skin, and internal organs.
Why was the development of the microscope important to cell theory?
It allowed scientists to see cells and understand their structure and functions.
What is the job of the Golgi apparatus?
It packages and transports proteins.
Why do multicellular organisms need different types of cells?
Different cells perform specialized functions to keep the organism alive
Which system sends messages through the body using electrical signals?
The nervous system.
Why does a raisin swell when placed in water?
Water moves into the raisin through osmosis.
What is one risk of not getting enough physical activity?
Increased risk of heart disease, poor circulation, or obesity.
Which part of the cell theory disproved the idea of spontaneous generation?
The idea that all cells come from pre-existing cells.
How do the endoplasmic reticulum and ribosomes work together?
Ribosomes make proteins, and the endoplasmic reticulum helps transport them.
How is the organization of a multicellular organism like a factory?
Each part (cell, tissue, etc.) has a specific job, like departments in a factory working together.
How does the excretory system help maintain balance in the body?
It removes waste and excess substances to keep the internal environment stable.
What would happen to a plant cell in salty water?
Water would move out of the cell, causing it to shrink (plasmolysis).
How can one health issue impact multiple systems?
Diabetes affects the circulatory system, nervous system, and kidneys.