Osmosis
What is Osmosis?
The simple diffusion of water across the cell membrane, it moves from high to low along the concentration gradient
What is Endocytosis?
Endocytosis uses vesicles to move large particles into the cell
How often do cells divide?
Every cell divides at a different rate based on its needs
What is the cell cycle controlled by?
It is controlled by a chemical control system that starts and stops in the cell cycle.
What does the cell cycle begin with?
A fertilized egg
What is a hypertonic solution?
When the water is lower than the cell's cytoplasm, so the net movement of the water will move out of the cell and shrivel up
What is Exocytosis?
Exocytosis uses vesicles to export materials out of the cell
Why do body cells divide?
For Growth and Repair
What plays a key role in the cell cycle?
Proteins
What is a fertilized egg called?
A zygote
What is a hypotonic solution?
When the water is higher than the cell's cytoplasm so the net movement of the water will move into the cell making it swell
What are examples of Endocytosis?
When white blood cells engulf bacteria in order to fight infection.
Why can't cells grow too big?
What are external signals of the cell cycle?
Signals that come from outside of the cell
How does the cycle begin?
Once the sperm fertilizes the egg, the fertilized egg then goes through cell division repeatedly
What is a Isotonic solution?
When the water is identical to the cell's cytoplasm so the cell stays the same.
What are examples of Exocytosis?
When nerve cells secrete neurotransmitters to send signals throughout the body
What are some examples of when cells need to divide?
Skin cells are every 2 weeks, liver cells are every 1 year, red blood cells are every 4 months, and the internal lining of the intestines is every 5 days
What are internal signals of the cell cycle?
Signals that come from the cell's own nucleus
What does cell division do?
Through mitosis cell division increase the rise of identical cells
What happens when there is high and low water concentration?
When there is high water concentration that means there is low solute concentration. And when there is low water concentration that means there is high solute concentration.
What are the two different types of Endocytosis?
Phagocytosis which is cell eating and Pinocytosis which is cell drinking.
What do cells dividing help with?
They help energy wise and allow substances to move in and out of the cell more easier
What are examples of the cell cycle?
Examples of External is Hormone and nutrients. Examples of internal is DNA inside of the cell.
What is differentiation?
A process that creates special structure and functions