10.3-10.4 Flashcards
are proteins that respond to events inside a cell. They allow the cell cycle to proceed only once certain processes have happened inside the cell.
Internal Regulators
are a family of proteins that regulate the timing of the cell cycle in eukaryotic cells.
Cyclins
are proteins that respond to events outside the cell. They direct cells to speed up or slow down the cell cycle.
External Regulators
are external regulators that stimulate the growth and division of cells. They are important during embryonic development and wound healing.
Growth Factors
a process of programmed cell death.
Apoptosis
is a disorder in which body cells lose the ability to control cell growth.
Cancer
Cancer cells divide uncontrollably to form a mass of cells called a
Tumor
The process by which cells become specialized is known as
Differentiation
The unspecialized cells from which differentiated cells develop are known as
Stem Cells
able to do everything, to form all the tissues of the body.
Totipotent
After about four days of development, a human embryo forms into a hollow ball of cells with a cluster of cells inside known as the inner cell mass.
Blastocyst
The cells of the inner cell mass are said to be ______ which means that they are capable of developing into many, but not all, of the body’s cell types.
Pluripotent
