Cell Theory
A student wants to observe the individual cells in a piece of onion skin. Which tool should they use, and why is this tool necessary?
Microscope, cells are too small to see with your eyes!
During photosynthesis, plants take in which carbon dioxide and water to make what for the plant?
Sugar (glucose)
Osmosis and diffusion occur across this organelle that is semi-permeable.
Cell Membrane
All living things are made of:
Cells
This man observed cork with his microscope and called the tiny boxes 'cells'
Robert Hooke
What process can cells use to break down sugar and release energy? What organelle does this process occur in?
Cellular Respiration, occurs in the mitochondria
Declan is learning about organelles in his sixth-grade science class. They are designing a research project focusing on 1 of the 6 organelles they are learning about. Declan decides to research how cells direct function and store DNA. Which organelle will Declan be researching?
Nucleus
What does it mean to be nonliving?
No cells, never had life.
A cut on your skin heals because existing cells divide and produce new cells. Which part of the cell theory does this demonstrate?
All cells come from existing cells.
Which process occurs when water diffuses into a cell?
What is osmosis?
Henry has a condition that affects his cells’ ability to make energy. He often feels tired and has trouble exercising for long periods of time. His doctor explains that the organelles in his cells are not producing enough energy for his body to use.
Which organelle is most likely affected by Henry's condition?
The Mitochondria
The human body contains many different types of cells, like muscle cells, nerve cells, and blood cells. Having multiple cells that complete specific functions makes them what type of organism?
A multicellular organism
Muscle cells work together to form muscle tissue. Muscle tissue works with other tissues to form a heart. What level of organization comes after tissue?
Organ
This occurs when particles of a substance move from where there are many particles to where there are few particles.
What is diffusion?
Which process breaks down sugar for energy?
Cellular Respiration
Flagella and cilia are often found on bacteria. These structures are used for cell movement. How many cells do organisms with flagella and cilia have? What type of organism does this make them?
They have 1 cell making them unicellular.
A student says, “Only animals and plants are made of cells.” Is the student correct? Use the cell theory to explain your answer.
No. All living things are made of ONE or MORE cells, like bacteria.
How does the structure of the cell membrane affect the function of the cell membrane?
The cell membrane is semi-permeable, meaning it has holes that allows materials to enter and exit.
What two organelles do plant cells have that animal cells do not? What are the two organelles' functions?
1. Plant cells have cell walls that provide structure and support. 2. Plant cells have chloroplasts the convert sunlight, water, and carbon dioxide into sugar and oxygen.
You go outside on a very cold day. Your body begins to shiver. You go outside on a very hot day. Your body begins to sweat. What is the term that describes the internal regulation to these external factors?
Homeostasis