Parts of a Cell
This part of the cell contains DNA and controls cell functions.
What is the nucleus?
What is a model?
Something that helps people understand something, like a phenomenon.
This is the smallest unit of life in all living organisms.
a cell?
What function does the nucleus have in cells?
control center of the cell...it directs metabolism and contains chromosomes made out of DNA
what is lysosomes?
lysosomes are membrane-bound organelles containing digestive enzymes.
Why would you revise a model?
To update it based upon new evidence.
why do cells divide?
there are several crucial reasons. Growth and Development: Multicellular organisms grow by increasing the number of cells.
What is the liquid within a cell where metabolism occurs?
cytoplasm
Known as the "powerhouse" of the cell, this organelle produces energy.
What is the mitochondria?
What are the functions of the cell membrane?
To protect the cell.
To let things in and out.
do cells have DNA?
Nearly every cell in a person's body has the same DNA.
what do cells do?
provide structure for the body, take in nutrients from food, convert those nutrients into energy, carry out specialized functions.
This part of the cell acts as a protective barrier, controlling what enters and exits the cell.
What is the cell membrane?
what does the nucleus do?
the nucleus is the control center of a cell. it houses the cells genetic material (DNA) which contains the instructions for building and maintaining the cell.
Why are cells small?
Cells are small to maximize their efficiency in exchanging materials, diffusing molecules, and communicating between the nucleus and the cytoplasm. This allows cells to function properly and maintain homeostasis.
Why is diffusion important?
This process is crucial for cells to get the nutrients they need and to get rid of waste products. Smaller cells are more efficient at diffusion because they have a larger surface area relative to their volume, allowing for faster exchange of materials.
what is cytoplasm?
cytoplasm is the gel-like substance that fills the inside of a cell.
What are the 6 things that determine that something is alive?
1. genetic material
2. growth
3. stimulus response (plant/light; animal/movement)
4. Requires energy
5. Homeostasis
6. Made of cells
why do cells store glucose as glycogen?
Cells store glucose as glycogen is a more compact and less disruptive way to store large amounts of energy than free glucose.
Explain diffusion
In cells, it's how tiny particles, like oxygen or nutrients, move from where there's a lot of them to where there are fewer.