Terms Flashcards
anabolism
process of building up complex materials (proteins) from simple materials. Anabolism produces proteins such as hormones and enzymes that are important to growth of cells. Anabolism occurs in the endoplasmic reticulum of a cell.
catabolism
Process of breaking down complex materials (foods) to form simpler substances and release energy.
cell membrane
Structure surrounding and protecting the cell. It determines what enters and leaves the cell.
chromosomes
Rod-shaped structures in the nucleus that contains regions of DNA called genes. There are 46 chromosomes (23 pairs) in every cell except for the egg and sperm cells, which contain only 23 individual, unpaired chromosomes.
cytoplasm
All the material that is outside the nucleus and yet contained within the cell membrane.
DNA
Chemical found within each chromosome. Arranged like a sequence of recipes in code, in directs the activities of the cells.
endoplasmic reticulum
Structure (canals) within the cytoplasm. Site in which large proteins are made from smaller protein pieces. Anabolism takes place on the ribosomes of the endoplasmic reticulum.
genes
Regions of DNA within each chromosome.
karyotype
Picture of chromosomes in the nucleus of a cell. The chromosomes are arranged in numerical order to determine their number and structure.
metabolism
The total of the chemical processes in a cell. It includes catabolism and anabolism.
mitochondria
Structures in the cytoplasm in which foods are burned to release energy. Catabolism takes place in mitochondria
nucleus
Control center of the cell. It contains chromosomes and directs the activities of the cell.
adipose tissue
Collection of fat cells.