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Glossary of terms used on this site

Glossary of biology.

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Glossaries

Term Main definition
subduction
Glossaries - Biology glossary

movement of one tectonic plate beneath another

substituted hydrocarbon
Glossaries - Biology glossary

hydrocarbon chain or ring containing an atom of another element in place of one of the backbone carbons

substrate
Glossaries - Biology glossary

molecule on which the enzyme acts

substrate-level phosphorylation
Glossaries - Biology glossary

production of ATP from ADP using the excess energy from a chemical reaction and a phosphate group from a reactant

sucrase
Glossaries - Biology glossary

enzyme that breaks down sucrose into glucose and fructose

sulcus
Glossaries - Biology glossary

(plural: sulci) indents or “valleys” in the cortex

sum rule
Glossaries - Biology glossary

probability of the occurrence of at least one of two mutually exclusive events is the sum of their individual probabilities

summation
Glossaries - Biology glossary

process of multiple presynaptic inputs creating EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potentia

superior colliculus
Glossaries - Biology glossary

paired structure in the top of the midbrain, which manages eye movements and auditory integration

superior vena cava
Glossaries - Biology glossary

drains blood from the jugular vein that comes from the brain and from the veins that come from the arms

supination
Glossaries - Biology glossary

movement of the radius and ulna bones of the forearm so that the palm faces forward

suprachiasmatic nucleus
Glossaries - Biology glossary

cluster of cells in the hypothalamus that plays a role in the circadian cycle

surface tension
Glossaries - Biology glossary

tension at the surface of a body of liquid that prevents the molecules from separating; created by the attractive cohesive forces between the liquid's molecules

surfactant
Glossaries - Biology glossary

detergent-like liquid in the airways that lowers the surface tension of the alveoli to allow for expansion

survivorship curve
Glossaries - Biology glossary

graph of the number of surviving population members versus the relative age of the member