Cell biology

Cell biology

The study of cell structure, physiological properties, interactions with the environment and life cycle.

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Cell biology

anaphylaxis

Biology; Cell biology

A severe allergic reaction in which histamine is released into the circulatory system; occurs upon subsequent exposure to a particular antigen; also called anaphylactic shock.

anabolic reactions

Biology; Cell biology

Reactions in cells in which new chemical bonds are formed and new molecules are made; generally require energy, involve reduction, and lead to an increase in atomic order.

amniocentesis

Biology; Cell biology

A method of prenatal testing in which amniotic fluid is withdrawn from the uterus through a needle. The fluid and the fetal cells it contains are analyzed to detect biochemical or chromosomal ...

amniote egg

Biology; Cell biology

An egg with compartmentalized sacs (a liquid-filled sac in which the embryo develops, a food sac, and a waste sac) that allowed vertebrates to reproduce on land.

amoebocytes

Biology; Cell biology

Amoeboid cells in sponges that occur in the matrix between the epidermal and collar cells. They transport nutrients.

amphibians

Biology; Cell biology

Class of terrestrial vertebrates which lay their eggs (and also mate) in water but live on land as adults following a juvenile stage where they live in water and breathe through gills. Amphibians ...