25.Which of the following have nontropic eft A. FSH B. LH C. TSH. D. MSH E. ACTH

Question

25.Which of the following have nontropic eft A. FSH B. LH C. TSH. D. MSH E. ACTH ombination of hormones helps a mother to produce milk and her baby? A. Prolactin and calcitrone. B. Oxytocin and prolactin. C. Follicle stimulating hormone and luteinizing hormone. D. Luteinizing hormone and oxytocin. E. Oxytocin, prolactin and luteinizing hormone 27.Melanocyte stimulating hormone is secreted by the A. Anterior pituitary gland. B. Pineal gland. C. Posterior pituitary gland. D. Intermediate lobe of the pituitary. E. Median eminence 28.Which of the following is characteristic of second messenger system and NOT the intracellular receptor system? A. Transcriptional activity of DNA is stimulated. B. New proteins are synthesized C. Cellular response occurs more rapidly. D. Long-term effects continue after removal of hormonal stimulus. E. The cellular response to hormonal stimulation is delayed 29.Which one of the following pairs of hormone-chemical /derivative is mismatched? A. Thyroxine-amino acid. B. Epinephrine-steroid. C. Insulin-protein. D. Estradiol-steroid E. Growth hormone-peptide.

Explanation / Answer

27) Answer-: (D) intermediate lobe of the pituitary,

The pituitary gland is located in a bony cavity called sella tursica and attached to hypothalamus by a stalk,it is devided anatomically into an adenohypophysis and neurohypophysis,

Adenohypophysis consist of two portion-Pars distalis and Pars intermedia

The pars distalis region of pituitary gland commonly called anterior pituitary produce GH,PRL,ACTH,TSH,FSH,

Pars intermedia secrete only one harmone called MSH,However " in humans,the pars intermedia is almost merged with pars distalis,

While Neurohyphophysis is Posterior pituitary,

25)Answer-:(D)MSH

•The MSH acts on the melanocytes(melanin containing cells) and regulates pigmentation of the skin of some fishes,amphibians and reptile,

26)Answer-(B) Oxytocin and Prolactin

°Oxytocin-:Oxytocin acts on the smooth muscle of our body and stimulate their contraction,in female stimulate a vigorous contraction of uterus at the time of child birth and milk ejection from the mammary gland,

°Prolactin-: Prolactin regulates the growth of the mammary glands and formation of Milk,

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