IV.Gymnosperm

Sexual reproduction-Oogamous

Female gametophyte is made up of n endosperm on which 2-8 archegonia are present

TLS Online TPP Program

#Id: 9100

#XL - T Zoology

In response to activation of acetylcholine GPCRs, PLC, and the elevation in cytosolic Ca²+, Nitric oxide is synthesized in endothelial cells.

TLS Online TPP Program

#Id: 9101

#XL - T Zoology

TLS Online TPP Program

#Id: 9102

#XL - T Zoology

NO diffuses locally through tissues and activates an

intracellular NO receptor with guanylyl cyclase

activity in nearby smooth muscle cells

TLS Online TPP Program

#Id: 9103

#XL - T Zoology

Resulting rise in cGMP activates protein kinase G leading to relaxation of the muscle and vasodilation

TLS Online TPP Program

#Id: 9299

#XL - T Zoology

Rod cells sense light with the aid of a light-sensitive GPCR called rhodopsin.

TLS Online TPP Program

#Id: 9300

#XL - T Zoology

Rhodopsin has two components: 

Opsin protein, member of the GPCR A family 

11-cis-retinal light-absorbing pigment