Ch 3 Cells: The Living Units Flashcards
-the cell is the smallest unit of life
-all organisms are made of one or more cells
-cells only arise from other cells
cell theory
are the structural units of all living things
cells
principle of complementary structure and function
the activities of cells are dictated by their shape and by the relative numbers of the subcellular level they contain
fibroblasts, epithelial cells, erythrocytes
cells that form body parts, linings, or transport gases
skeletal muscle cell, smooth muscle cells
cells that move organs and body parts
fat cells
cells that store nutrients
cell that fights disease
macrophage
cell that gathers information and controls body function
nerve cell
cell of reproduction
sperm
the outer boundary of the cell which acts as a selectively permeable barrier
plasma membrane
the intracellular fluid packed with organelles, small structures that preform specific cell functions
cytoplasm
an organelle that controls the cellular activities. lies near the cells center
nucleus
are substances contributing to body mass that are found outside the cells
extracellular materials
includes interstitial fluid, blood plasma, and cerebrospinal fluid. l
extracellular fluid (ECF)
dissolves and transports substances in the body. Interstitial fluid is like rich nutritious soup. cells need it to stay healthy
extracellular fluid (ECF)
include substances aid in digestion (intestinaland gastric fluids, saliva)
cellular secretions
is the most abundant extracellular material
extracellular matrix
“cell glue” is particularly abundant in connective tissues.
extracellular matrix
separates two of the body’s major fluid compartments: intracellular fluid within cells and the extracellular fluid outside the cells
plasma membrane
cell membrane is a synonym for
plasma membrane
