Free course

Addiction and neural ageing

Glossary


Glossary for SD805_2
Browse the glossary using this index

Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL

Page:  1  2  3  4  5  6  7  8  9  10  ...  55  (Next)
  ALL

5

5-HT

5-hydroxytryptamine (serotonin). Biologically active amine occurring as a hormone in plants and as both a hormone and a neurotransmitter in animals. Like acetylcholine, adrenalin and noradrenalin, serotonin acts on many organs of the body, either directly or by a neuronal reflex.

Permalink: 5-HT

A

absorptive state

Period after a meal during which glucose is entering the bloodstream after its absorption from the gut.

Permalink: absorptive state

acetylcholine

A neurotransmitter. (Adj. cholinergic.)

Permalink: acetylcholine

action potential

A pulse of electricity that is generated in neurons and travels their length. The means of communication within neurons. Action potentials are ‘all-or-none’, meaning that they either occur in full or not at all.

Permalink: action potential

active site

The region of an enzyme molecule where the substrate binds and catalysis occurs.

Permalink: active site

active transport

Transport processes across membranes that require the expenditure of energy and use specialised transport molecules.

Permalink: active transport

adaptive characteristics

Variations in body structure, or function, or behaviour, which give some members of a species a survival advantage and hence increase their chances of leaving more surviving offspring than other members of the same species.

Permalink: adaptive characteristics

adenosine triphosphate

See

ATP.
Permalink: adenosine triphosphate

adipose tissue

Tissue composed of fat cells (adipocytes). The site of storage of fats (triacylglycerols).

Permalink: adipose tissue

affect

Term used in psychology and psychiatry as a way of describing a person’s responses of emotion and attention to events in the world around them.

Permalink: affect


Page:  1  2  3  4  5  6  7  8  9  10  ...  55  (Next)
  ALL


SD805_2

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to university level study, find out more about the types of qualifications we offer, including our entry level Access courses and Certificates.

Not ready for University study then browse over 900 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus