Case Study 16
1.Methyl mercaptan is used to give natural gas its distinctive odor.
2.Yes they can regenerate since there are stem cells (i.e. basal cells) present. These are the only neurons that commonly regenerate.
3.Dan will not be able to taste normally if the olfactory epithelia are damaged, just as a cold reduces taste sensation. Input from the nasal receptors enhances flavor analysis.
4.Although debris did not enter his eyes during the explosion, there was intense light and heat from the explosion that could have affected his eyes. The excessively bright light may have damaged some of the photoreceptors and contributed to the blurred vision he is experiencing. Inflammation of the conjunctiva and corneal epithelium from the intense heat could also lead to blurred vision. The excessive heat may have created a dry eye condition that can lead to increased friction and drying of the corneal surface resulting in pain. It is also possible that the explosion caused him to hit his head and damage the visual center in the occipital lobe and contributing to the blurred vision due to a decreased ability to interpret the data provided by the eyes.
5.Lens, cornea, constricted pupil, and vitreous body with floaters could be involved in blocking the path of light to his retina.
6.In the eye where the detachment occurred, a loss of color vision and visual acuity would occur. But Dan could use rods and still have some peripheral vision.
7.Muscles of the tensor tympani and stapedius serve a protective function by tensing the auditory ossicles preventing damage to the inner ear neurons.
8.The tympanic membrane is composed of epithelial and connective tissues that readily regenerate. The inner ear is mostly composed of neural tissues. Neurons do not heal well and can rarely be replaced. Damage to the inner ear would be permanent if he damaged the receptors in the cochlea (spiral organ), semicircular canals (ampullae), or vestibule (otolithic organs), or the vestibulocochlear nerve that
2.Yes they can regenerate since there are stem cells (i.e. basal cells) present. These are the only neurons that commonly regenerate.
3.Dan will not be able to taste normally if the olfactory epithelia are damaged, just as a cold reduces taste sensation. Input from the nasal receptors enhances flavor analysis.
4.Although debris did not enter his eyes during the explosion, there was intense light and heat from the explosion that could have affected his eyes. The excessively bright light may have damaged some of the photoreceptors and contributed to the blurred vision he is experiencing. Inflammation of the conjunctiva and corneal epithelium from the intense heat could also lead to blurred vision. The excessive heat may have created a dry eye condition that can lead to increased friction and drying of the corneal surface resulting in pain. It is also possible that the explosion caused him to hit his head and damage the visual center in the occipital lobe and contributing to the blurred vision due to a decreased ability to interpret the data provided by the eyes.
5.Lens, cornea, constricted pupil, and vitreous body with floaters could be involved in blocking the path of light to his retina.
6.In the eye where the detachment occurred, a loss of color vision and visual acuity would occur. But Dan could use rods and still have some peripheral vision.
7.Muscles of the tensor tympani and stapedius serve a protective function by tensing the auditory ossicles preventing damage to the inner ear neurons.
8.The tympanic membrane is composed of epithelial and connective tissues that readily regenerate. The inner ear is mostly composed of neural tissues. Neurons do not heal well and can rarely be replaced. Damage to the inner ear would be permanent if he damaged the receptors in the cochlea (spiral organ), semicircular canals (ampullae), or vestibule (otolithic organs), or the vestibulocochlear nerve that