Addiction and neural ageing
Addiction and neural ageing

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.


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


kainate receptor

A type of excitatory amino acid receptor for which glutamate may be the endogenous ligand. It is named after its specific agonist ligand, kainate. The receptor is coupled to Na+/K+ channels in the cell membrane, which are opened when activated by the agonist. Activation by the agonist is indirect, through the action of G-protein, or guanine nucleotide binding protein, which acts as a transducer of information between the receptor and the ion channel. For more details on the structure and mechanism of signal transduction, see Carlson, Ch. 4; or Oxford Reference Online.

kin selection

Natural selection operating indirectly on a character by favouring the relatives of the individual having that character. For example, the genes that cause a woman’s reproductive activity to be switched off at a certain stage will be favoured by natural selection if, as a result of her post-reproductive behaviour, her progeny and those of other close relatives are more likely to survive.

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, we offer two introductory routes to our qualifications. You could either choose to start with an Access module, or a module which allows you to count your previous learning towards an Open University qualification. Read our guide on Where to take your learning next for more information.

Not ready for formal University study? Then browse over 1000 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 prospectus371