Ch. 10 Cell Growth Flashcards
(17 cards)
The rate at which food, oxygen, and water are used and waste produced depends on what of the cell?
The cells volume
Cytoplasm uses nutrients and produces waste.
What does the cell membrane do?
- surface area of the cell
- controls nutrients entering cell and leaving the cell
Ratio of surface area to volume:
The size of a cell increases: does its volume increase faster than the surface area or the surface area increase faster than the volume.
The cells volume increases faster than the surface area.
What is the surface area of a cube?
6(l•w)
What is the volume of a cube?
L•w•h
Why are cells so small?
Cells are so small because they can’t get enough nutrients
Mitosis:
What are the four phases of mitosis?
Prophase, metaphase, anaphase, and telophase.
What is mitosis?
Mitosis is the division of the cell Nucleus.
What is cytokinesis?
Cytokinesis is the division of the cell cytoplasm.
Chromosomes:
Before cell division each chromosome is…?
Each chromosome is duplicated or copied.
Each chromosome consists of what?
Each chromosome consists of two identical “sister” Chromatids.
The cell cycle:
Interphase(growth)
DNA (duplication)
Mitosis(nucleus divides)
Cytokinesis(cytoplasm divides)
What is the longest stage of the cell cycle?
Interphase
Mitosis is divided into what four phases?
Prophase….Preparing for nucleus to divide.
Metaphase….Chromosomes line up.
Anaphase….Sister chromatids separate.
Telophase….Forms two new nuclei.
How do cells know when to stop reproducing?
Experiments show that normal cells will reproduce until they come into contact with other cells.
What protein regulates the cell cycle?
Scientists call this protein cyclin.
What are cancer cells?
Cancer cells are cells that divide uncontrollably before in masses of cells called tumors that can damage to surrounding tissues.
