LFRs is found at red region (660 nm) and (720 nm) includes processes such as the promotion of lettuce seed germination, inhibition of hypocotyl elongation, and regulation of leaf movements.

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Depolarization in myelinated axons travels from one node of Ranvier to the next, this “jumping” of depolarization from node to node is called

saltatory conduction

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Saltatory conduction is a rapid process that allows myelinated axons to conduct up to 50 times faster than the fastest unmyelinated fibers

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Lioyd and Hunt, applies only to sensory nerve fibers and uses a Roman numeral nomenclature of I, II, III, and IV

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Neurotrophins 

Necessary for survival and growth of neurons

In the CNS produced by astrocytes

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High affinity Neurotrophins  receptors

Tyrosine kinase associated (Trk) receptors 

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Low-affinity NGF receptor

p75 NTR (also called NTR 5 neurotrophin receptor)