Ch. 4 Cells, Tissues, and Organs Flashcards
ATP
The energy compound of the cell Adenosine Triphosphate
Carbohydrate
the category of organic compounds that includes sugars and starches
Cell
the basic structural and functional unit of the living organism; a microscopic unit that combines with other cells to form tissues
Chromosome
a thread-like body in a cell’s nucleus that contains genetic information
Cytology
the study of cells
Cytoplasm
the fluid that fills the cell and holds the organelles
DNA
deoxyribonucliec acid; the genetic compound of the cell
Enzyme
An organic substance that speeds the rate of metabolic reaction
Gene
A hereditary unit composed DNA and combined with other genes to form chromosomes
Glucose
a simple sugar that circulates in the blood, the main energy source for metabolism
Histology
study of tissues
Homeostasis
a steady state, a condition of internal stability and constancy
Lipid
A category of organic compound that includes fats
Membrane
a simple, very thin, and pliable sheet of tissue that might cover an organ, line a cavity, or separate structures
Metabolism
The sum of all the physical and chemical reactions that occur within an organism
Mitosis
Cell Division
Mucus
a thick fluid secreted by cells in membranes and glands that lubricates and protects tissues
Nucleus
The cells control center; directs all cellular activity
Organ
A part of the body with a specific function, a component of a body system
Protein
a category of organic compounds that include structural materials, enzymes and some hormones
RNA
Ribonucleic Acid; an organic compound involved in the manufacture of proteins within cells
Tissue
A group of cells that acts together for a specific purpose
morph/o
form
cyt/o, -cyte
cell