study of cells Flashcards
cytology
study of single body cells and their internal structures
cell sizes are measured in
micrometers
general functions of human body cells
-cover external and internal structures
-lining
-storage
-movement
-connection
-defense
-communication
-reproduction
three basic parts of most human cells
plasma membrane, cytoplasm, nucleus
cell cycle
the processes associated with cell division to replace aging, damaged, or dead cells
two phases of the cell cycle
interphase and mitotic phase
interphase
time between cell division
mitotic phase
cell division; produces two daughter cells that are genetically identical to the parent cell
characteristics of interphase
-maintenance/resting phase
-majority of life cycle
-normal metabolic activities
divisions in the mitotic phase
mitosis and cytokinesis
mitosis
division of the nucleus
cytokinesis
division of the cytoplasm
cellular aging
-normal and continuous process
-indicated by changes in organelles and/or chromatin
two ways cells can die
necrosis and apoptosis
necrosis
death due to damage, trauma, or injury; unplanned