heat

pain

pressure

touch

Intracellular, interstitial, plasma

Intracellular, plasma, interstitial

Plasma, intracellular, interstitial

Plasma, interstitial, intracellular

Gap junctions

Chemical synapses

Desmosomes

Tight junctions

They connect photoreceptors directly to ganglion cells.

They generate action potentials in response to light.

They sharpen images through lateral inhibition.

They provide lateral integration between retinal neurons.

Depolarisation of the membrane 

Hypopolarisation of the membrane

Repolarisation of the membrane 

Signalling vesicular release of neurotransmitters

Excitation-contraction coupling in skeletal muscle results in calcium release through potassium pumps

Excitation-contraction coupling in skeletal muscle involves sarcolemma expansion

Excitation-contraction coupling in skeletal muscle is enhanced by high intracellular magnesium concentration

Excitation-contraction coupling in skeletal muscle Involves interaction between dihydropyridine and ryanodine receptors

salty

sour

sweet

bitter

Aldosterone

Androstenedione

Cortisol

Anti-diuretic hormone (ADH)

It is formed in the spinal cord by ependymal cells

It provides mechanical protection, chemical protection, and circulation of nutrients/wastes

It is mainly excitatory to skeletal muscles

It is primarily composed of blood plasma and cannot carry nutrients

Acetylcholine

Serotonin

GABA

Dopamine