Question

1. 1,25-Dihydro vitamin D...
(a) Synthesis occurs in the skin
(b) Increases osteoclast-mediated resorption of mineralized bone
(c) Signals renal calcium reabsorption via activation of nuclear receptors
(d) Works in a cooperative fashion with calcitonin to increase plasma calcium levels
(e) All of the above are correct

2. A man has a kidney disorder that causes him to have higher-than-normal renal excretion of calcium. Which of the following hormones would be elevated in his blood to normalize his blood calcium levels?
(a) Calbinin
(b) Parathyroid hormone
(c) Calcitonin
(d) Thyroxine (T4)
(e) Calciferol

3. Which of the following hormones is secreted from intestinal endocrine cells and functions to potentiate glucose-induced insulin secretion and suppression of appetite?
(a) Gastrin
(b) Secretin
(c) Glucagon-like peptide (GLP-1)
(d) Motilin
(e) Somatostatin

4. Non-exercise activity thermogenesis (NEAT) is related to motor activities such as fidgeting and might explain why some individuals are thin despite lower rates of daily activity. Heat generation from NEAT most likely results from which of the following?
(a) Inefficient cooling of the body core
(b) Inefficient conversion of substrates to products during chemical reactions
(c) Increased leptin secretion
(d) Adaptive thermogenesis in response to cold
(e) None of the above are correct

5. Energy lost as heat during digestion and absorption of a meal...
(a) Is called diet-induced thermogenesis
(b) Has no impact on whole-body metabolism
(c) Is regulated by triiodothyronine (T3)
(d) Is included in the calculation of an individual's basal metabolic rate (BMR)
(e) All of the above are correct

Answer 1

1.1,25-Dihydro vitamin D...
(a) Synthesis occurs in the skin (Right option). It is synthesised in keratinocytes of stratum basale to stratum spinosum layes of epidermis.   
  

2. (B) parathyroid hormone. Hyper parathyroidism is seen in conditions when calcium levels are low due to kidney disease, vit d deficiency etc.

3. (B) Secretin . It stimulates secretion of insulin and inhibits secretions of gastrin and that suppress the appetite.

4. (C) we have evidences that decreased leptin secretion leads to obesity . So may be increased leptin secretion is right answer.

5. (E) all are corrext