Question
Give the functions/role of the following structure/organs in our body:
i) Pineal gland
ii) Cochlea
iii) Urethra
iv) Large intestine
v) Cholecystokinin-pancreozymin (CCK-PZ)
vi) Pyloric orfice
vii) Lungs
viii) Bundle of His
ix) Major Histocompatability complex (MHC)
x) Platelets
Answer :
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Skip in 10
i) Pineal gland: The pineal gland is a small endocrine gland located in the brain. Its primary function is to secrete the hormone melatonin, which regulates the body's circadian rhythm or sleep-wake cycle. Melatonin secretion increases in darkness and decreases in light, helping maintain normal sleep patterns. The pineal gland also influences reproductive functions, seasonal biological rhythms, and acts as an antioxidant by protecting cells from oxidative stress. ii) Cochlea: The cochlea is a spiral-shaped structure of the inner ear responsible for hearing. It contains the organ of Corti with specialized hair cells that convert sound vibrations into electrical nerve impulses. These impulses are transmitted through the auditory nerve to the brain, where they are interpreted as sound. The cochlea also helps distinguish different sound frequencies and intensities. iii) Urethra: The
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