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Glossary of terms used on this site

Glossary of biology.

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Glossaries

Term Main definition
intermediate filament
Glossaries - Biology glossary

cytoskeletal component, comprised of several fibrous protein intertwined strands, that bears tension, supports cell-cell junctions, and anchors cells to extracellular structures

intermittent symptom
Glossaries - Biology glossary

symptom that occurs periodically

internal fertilization
Glossaries - Biology glossary

fertilization of egg by sperm inside the body of the female

internal receptor
Glossaries - Biology glossary

(also, intracellular receptor) receptor protein that is located in the cytosol of a cell and binds to ligands that pass through the plasma membrane

internal receptor
Glossaries - Biology glossary

(also, intracellular receptor) receptor protein that is located in the cytosol of a cell and binds to ligands that pass through the plasma membrane

internode
Glossaries - Biology glossary

region between nodes on the stem

intersexual selection
Glossaries - Biology glossary

selection of a desirable mate of the opposite sex

interspecific competition
Glossaries - Biology glossary

competition between species for resources in a shared habitat or environment

interstitial cell of Leydig
Glossaries - Biology glossary

cell in seminiferous tubules that makes testosterone

interstitial fluid
Glossaries - Biology glossary

fluid between cells

intertidal zone
Glossaries - Biology glossary

part of the ocean that is closest to land; parts extend above the water at low tide

intervertebral disc
Glossaries - Biology glossary

composed of fibrous cartilage; lies between adjacent vertebrae from the second cervical vertebra to the sacrum

intestinal phase
Glossaries - Biology glossary

third digestive phase; begins when chyme enters the small intestine triggering digestive secretions and controlling the rate of gastric emptying

intine
Glossaries - Biology glossary

inner lining of the pollen

intracellular hormone receptor
Glossaries - Biology glossary

a hormone receptor in the cytoplasm or nucleus of a cell