Beta adrenaline

Only nicotinic ACh

ACh or NA

Only muscarinic ACh

Only ACh

Chemico-electrical synapse

G protein coupled synapse

Discrete synapse

2nd messenger synapse

Diffuse synapse

A Varicosity

An output terminal

A Terminal

A diffuse terminal

A Discrete synapse

Have DNA binding sites that differ from their hormone binding sites

Have a common DNA binding site and hormone binding site

Highly selective for hormones and there is no cross-talk between systems

Chaperones to take hormones to the nucleus

Are tethered to the DNA by chaperone proteins, to expose the hormone binding site

Although they act on the same GPRC, they can activate different 2^nd messengers

They can act through the PLC pathway which is highly diverse in effects

There is diversity of G protein coupled receptors and of G proteins

They all involve the use of Ca⁺⁺ which always causes a diversity of cellular effects

They can act through the cAMP pathway both of which are highly diverse in effects