Types of Leaf

Simple Leaf

Compound Leaf

The compound leaves may be of two types;

A number of leaflets are present on a common axis, the rachis, which represents the midrib of the leaf called Pinnately compound leaf

Ex- Neem 

The leaflets are attached at a common point, such as at the tip of petiole, called Palmately compound leaf

EX- poison ivy, familiar house plant Schefflera sp. (commonly called “umbrella plant”)

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#Id: 1318

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Rod cells sense light via light-sensitive GPCR known as Rhodopsin.

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#Id: 1319

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The heterotrimeric G protein coupled to rhodopsin, called Transducin.

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#Id: 1320

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On absorption of a photon, the retinal moiety of rhodopsin is immediately converted into 11-cis-retinal to the all-trans retinal.

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#Id: 1321

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Rapid Termination of the Rhodopsin Signal Transduction Pathway Rhodopsin kinase & Arrestin.

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#Id: 1322

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Gαi activate α2-Adrenergic receptor

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#Id: 1323

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Positive and negative regulation of adenylyl cyclase activity-

Gαs-coupled receptors

Gαi-coupled receptors