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Glossary of terms used on this site

Glossary of biology.

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Glossaries

Term Main definition
adrenal cortex
Glossaries - Biology glossary

outer portion of adrenal glands that produces corticosteroids

adrenal gland
Glossaries - Biology glossary

endocrine glands associated with the kidneys

adrenal medulla
Glossaries - Biology glossary

inner portion of adrenal glands that produces epinephrine and norepinephrine

adrenocorticotropic hormone (ACTH)
Glossaries - Biology glossary

hormone released by the anterior pituitary, which stimulates the adrenal cortex to release corticosteroids during the long-term stress response

adventitious
Glossaries - Biology glossary

describes an organ that grows in an unusual place, such as a roots growing from the side of a stem

adventitious root
Glossaries - Biology glossary

aboveground root that arises from a plant part other than the radicle of the plant embryo

aerobic respiration
Glossaries - Biology glossary

process in which organisms convert energy in the presence of oxygen

afferent arteriole
Glossaries - Biology glossary

arteriole that branches from the cortical radiate artery and enters the glomerulus

affinity
Glossaries - Biology glossary

attraction of molecular complementarity between antigen and antibody molecules

age structure
Glossaries - Biology glossary

proportion of population members at specific age ranges

aggregate fruit
Glossaries - Biology glossary

fruit that develops from multiple carpels in the same flower

aggressive display
Glossaries - Biology glossary

visual display by a species member to discourage other members of the same species or different species

aldosterone
Glossaries - Biology glossary

steroid hormone produced by the adrenal cortex that stimulates the reabsorption of Na+ from extracellular fluids and secretion of K+

aleurone
Glossaries - Biology glossary

single layer of cells just inside the seed coat that secretes enzymes upon germination

algal bloom
Glossaries - Biology glossary

rapid increase of algae in an aquatic system