QUESTION 4 There are dozens of different genetic variants of G-alpha. Compared to cells expressing a normal variant, Which of the following would you expect to increase in cells expressing a variant of G-alpha that has lower than normal GTPase activity? (Select all that apply!) O Glycogen phosphorylase activity O Glycogen synthase activity O CAMP levels O Protein Phosphatase-1 activity O Adenylate cyclase activity O glucose production
Anatomy and Physiology of Special Sensory Organs
Sensory organs can be labeled as special sensory structures that permit sight, hearing, odor, and flavor. Sensory structures permitting proprioception, touch, thermal, and pain perception can be classified as more advanced sensory organs. The sensory neurons are trained to find out modifications in the external and internal conditions so that a person's body can react to that change. A stimulus is the first signal that is recognized by any sensory receptor of the body. Stimulus is an impulse generated when there is a change in the surroundings of a person. For example, a heated environment will alert the brain through the thermal sensory organs and generate a reflex accordingly.
Sensory Receptors
The human sensory system is one of the most complex and highly evolved structures, which processes a myriad of incoming messages. This well-coordinated system helps an organism or individual to respond to external stimuli, appropriately. The sensory receptors are an important part of the sensory system. These receptors are specialized epidermal cells that respond to external environmental stimuli. These receptors consist of structural and support cells that form the peripheral unit of the receptor and the neural dendrites which receive and detect the external stimuli.
The alpha subunit (, ) is a subunit of the heterotrimeric G protein . alpha subunit is a GTPase that functions as a cellular signalling protein. alpha is the founding member of one of four heterotrimeric G protein families, which are distinguished by the number of alpha subunits they contain: the family, family, family, and family. Golf is the other member of the family, named from its primary expression in the olfactory system. Gs is encoded by the GNAS complex locus in humans, while Golf is encoded by the GNAL gene.
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