how does visual transduction occur in rods? Select one: a. By inhibition: light bleaches the rhodopsin molecules, which closes sodium channels. This hyperpolarizes the rods and increases GABA release. b. By excitation: light inhibits rhodopsin molecules, which blocks sodium ion influx. This depolarizes the rods and causes glutamate release. c. By inhibition: light bleaches rhodopsin molecules, which closes sodium channels. This hyperpolarizes the rods and reduces glutamate release. d. By excitation: light activates rhodopsin molecules, which opens sodium channels. This depolarizes the rods and causes glutamate release
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.
how does visual transduction occur in rods?
The retina of the eye is packed with photosensitive cells called "rod" and "cone" cells which contain photosensitive pigments that help in the conversion of light stimulus into electrical signals. This process is known as visual transduction. Rod cells mediate dim light non-color vision and contain the photosensitive molecule rhodopsin which consists of a membrane protein called opsin and a light sensitive chromophore called retinal.
Step by step
Solved in 2 steps
