Which hormones are examples of G Protein Coupled Receptors?

G Protein Coupled Receptors (GPCRs) are a large family of receptors that play a pivotal role in cellular communication and signaling. The correct choice includes hormones such as Follicle Stimulating Hormone (FSH) and Gonadotropin-Releasing Hormone (GnRH), which function through GPCR pathways.

FSH is involved in reproductive processes and signals through its receptor, which is a type of GPCR. When FSH binds to its receptor, it activates intracellular signaling cascades, leading to biological responses such as stimulation of ovarian follicle development in women and sperm production in men.

GnRH is released from the hypothalamus and also interacts with GPCRs. It triggers the release of luteinizing hormone (LH) and FSH from the pituitary gland, further driving the reproductive hormone cascade.

Both of these hormones utilize G protein signaling mechanisms to exert their effects, making this option the only one among the choices that appropriately identifies hormones associated with GPCRs. In contrast, the other options include insulin and glucagon (which primarily signal through receptor tyrosine kinases), estrogen and testosterone (which act mainly through nuclear receptors), and serotonin and dopamine (though they have some GPCR subtypes, their primary