Dictionary > Synaptic cleft

Synaptic cleft

Definition
noun
The minute gap between presynaptic cell and postsynaptic cell in a chemical synapse, across which the neurotransmitters diffuse into.
Supplement
This gap acts as a site where neurotransmitters from presynaptic cell (e.g. neuron) are released into by exocytosis and diffuses across to bind with the receptors in the cell membrane of postsynaptic cell. This gap is only a minute space allowing the concentration of neurotransmitters to be raised and lowered rapidly.
Word origin: synaptic > synapse + cleft.
See also: chemical synapse.


You will also like...

takahē
Takahē (Porphyrio hochstetteri)

Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..

Golgi apparatus (3-D illustration)
Role of Golgi Apparatus & Endoplasmic Reticulum in Protein Synthesis

The endoplasmic reticulum and Golgi apparatus are the organelles involved in the translation step of protein synthesis a..

Hormone Production
Hormone Production

Hormones are chemical messengers produced by specialized glands and they were produced by switching on the genes designe..

Sensory systems
Sensory Systems

A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..

Selective Breeding
Selective Breeding

Gregor Mendel's studies into Monohybrid and Dihybrid crossing and Charles Darwin's study of evolution and natural select..

Nephrolepis exaltata
Vascular Plants: Ferns and Relatives

Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..