Tag: pineal gland and thymus
Questions Related to pineal gland and thymus
Mammalian biorhythms may be due to differential secretion of
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FSH
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MSH
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Melatonin
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Sex corticoids
- The pineal gland or pineal body (epiphysis or third eye) is a small endocrine gland.
- It secretes melatonin (hormone) which regulates the wake/sleep patterns and photoperiodic functions.
- Biorhythms or biological rhythms control sleep and wake cycles and other functions such as behaviour and endocrine rhythms. These functions are regulated by the circadian clock.
- The secretion of melatonin is triggered in dark and inhibited by light.
- So, the correct answer is 'Melatonin'.
Hormone melatonin is secreted by
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Adrenal
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Thymus
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Pituitary
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Pineal
Brain sand is associated with
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Thymus gland
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Pineal gland
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Thyroid gland
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Pituitary gland
Photoperiods are believed to be perceived by
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Hypothalamus
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Pineal body
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Pituitary gland
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Thyroid
- Photoperiodism is the physiological reaction to the length of day or night by an organism.
- The pineal gland or pineal body (epiphysis or third eye) is a small endocrine gland.
- It secretes melatonin (hormone) which regulates the wake/sleep patterns and photoperiodic functions.
- So, the correct answer is 'Pineal body'.
Endocrine gland that functions as biological clock and a neurosecretory transducer is __________.
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Adrenal gland
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Thyroid gland
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Thymus gland
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Pineal gland
Anti-ageing hormone is
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Thyroxine
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Melatonin
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Estrogen
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Testosterone
Melanin pigment of human skin is produced by
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Mast cells of corium
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Melanocytes of corium and incorporated there
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Melanocytes of corium and incorporated in epidermis
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Melanocytes of epidermis
- Melanin is a pigment produced within the skin in melanocytes or skin cells when they are exposed to the sun.
- The process by which the pigment melanin is formed by the melanocytes is called melanogenesis.
- The pigment is formed within a small membrane-bound structure called melanosomes.
- The skin colour is determined by a bluish-white connective tissue under the dermis or corium and the haemoglobin circulating in the veins of the corium.
- The corium is a layer of skin present between the epidermis and the subcutaneous tissues of the skin.
- Two types of melanin are formed in the body pheomelanin (red to yellow in colour) and eumelanin (dark brown to black).
- Those people with light complexion produce pheomelanin whereas, those with dark complexion produce eumelanin.
- So, the correct answer is 'Melanocytes of corium and incorporated in epidermis'.
Hormone produced more in dark is
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Thyroxine
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Melatonin
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Adrenaline
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Insulin
Which is not a function of thyroid hormone?
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Regulation of basal metabolic rate
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Controls metabolism of carbohydrates, proteins and fats
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Maintains water and electrolyte balance
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Regulates the diurnal rhythm
- regulation of BMR (Basal metabolic rate) by thyroxine which increases consumption of glucose by metabolically active tissues.
- regulation of proteins, carbohydrates and fats metabolism.
- regulation of water and electrolyte balance by calcitonin which inhibits reabsorption of calcium by renal tubules.
Human endocrine gland regulating body rhythms is
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Adrenal
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Pineal
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Thymus
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Thyroid