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.
Use the word bank to answer, answers can only be used once from the word bank
- Microvilli are to taste receptors as ---- are two smell receptors.
- Human have ---- glomeruli in each olfactory bulb.
- Taste receptors for sour substances ----.
- The first processing stage of taste information in the brain is ----.
- The neurotransmitter released by taste receptors: ----.
- ---- transmit smell information directly to the Piriform cortex.
- Condition tasted version involves memory it in the ----.
- Sensitivity to this taste enables us to identify sources of protein: ----.
- Mice have ---- different types of olfactory receptor cells.
- Axons of olfactory sensory neurons ----.
Word bank:
- Ionotropic
- Cranial nerves
- Cilia
- 2000
- Umami
- 1000
- Unmyelinated
- Insular Cortex
- Mitral cells
- ATP
- 25000
- Unipolar
- 350
- PTC
- Papillae
- Metabotropic
- Gustatory Nucleus of the Solitary Tract
- Bipolar receptor neurons
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