Cell Divison Flashcards
what is cell division
when one cell separates to make two cells with the same DNA
what are the three main reasons for cell division
reproduction, growth, and repair of damage
what is cell division for reproductions
parent cells divide to produce two new organisms and each organism inherits genetic information from its parent
what are the two types of reproduction
asexual and sexual
what is asexual reproduction
production of offspring from only one parent where the offspring are genetically identical to the parent
what are some pros of asexual reproduction
-only needs one parent
-can reproduce much faster
what is sexual reproduction
production of offspring by one cell from a parent joining with a cell from another parent
offspring have genetic information from both parents
what is cell division for growth
chemicals needed for cell activity tend to diffuse and if cells were too big it would take too long for nutrients to get around the cell
what is concentration
the amount of substance (solute) present in a given volume of a solution
what is osmosis
the movement of fluid in water in and out of the cell
in the direction of greater solute concentration
what is diffusion
movement is driven from an area of high concentration to low concentration
what is cell division for repair
our bodies constantly replacing dead cells by living cells dividing and creating replicas of themselves
how many skin cells are shed every day
millions
after how many days are red blood cells replaced
120
why do humans need cell division for repair
-to heal ourselves
-cuts/ blisters need new cells to fill in the gaps
-broken bones need new cells to heal
