Glossary of terms used on this site

Glossary of biology.

Search for glossary terms (regular expression allowed)

Glossaries

Term Main definition
ubiquinone
Glossaries - Biology glossary

soluble electron transporter in the electron transport chain that connects the first or second complex to the third

ulna
Glossaries - Biology glossary

bone located on the medial aspect (pinky-finger side) of the forearm

ultrasound
Glossaries - Biology glossary

sound frequencies above the human detectable ceiling of approximately 20,000 Hz

umami
Glossaries - Biology glossary

one of the five basic tastes, which is described as “savory” and which may be largely the taste of Lglutamate

unidirectional circulation
Glossaries - Biology glossary

flow of blood in a single circuit; occurs in fish where the blood flows through the gills, then past the organs and the rest of the body, before returning to the heart

unified cell theory
Glossaries - Biology glossary

a biological concept that states that one or more cells comprise all organisms; the cell is the basic unit of life; and new cells arise from existing cells

uniporter
Glossaries - Biology glossary

transporter that carries one specific ion or molecule

uniramous
Glossaries - Biology glossary

referring to one branch per appendage

unsaturated fatty acid
Glossaries - Biology glossary

long-chain hydrocarbon that has one or more double bonds in the hydrocarbon chain.

untranslated region
Glossaries - Biology glossary

segment of the RNA molecule that is not translated into protein. These regions lie before (upstream or 5') and after (downstream or 3') the protein-coding region

up-regulation
Glossaries - Biology glossary

an increase in the number of hormone receptors in response to increased hormone levels

upstream
Glossaries - Biology glossary

nucleotides preceding the initiation site; in general, sequences toward the 5' end relative to a site on the mRNA

urea cycle
Glossaries - Biology glossary

pathway by which ammonia is converted to urea

ureotelic
Glossaries - Biology glossary

describes animals that secrete urea as the primary nitrogenous waste material

ureter
Glossaries - Biology glossary

urine-bearing tube coming out of the kidney; carries urine to the bladder

This website puts documents at your disposal only and solely for information purposes. They can not in any way replace the consultation of a physician or the care provided by a qualified practitioner and should therefore never be interpreted as being able to do so.