When phosphodiesterase is activated by a G-protein A. Cyclic AMP increases B. Cy

Question

When phosphodiesterase is activated by a G-protein A. Cyclic AMP increases B. Cyclic AMP remains constant C. Cyclic AMP decreases D. Protein kinase increases E. None of the above Which of the following is an example of a permissive effect of a hormone? A. The effect thyroid hormone on growth B. The effect of insulin on glucose uptake by cells growth hormone C. The effect of sex hormones on the secretion of D. A and C E. All of the above Which of the following would be expected to alter hormonal levels? A. Changes in mineral and nutrient plasma levels B. Pituitary tumor C. Transatlantic flight D. Training for the Olympics. E. All of the above malfunction All of the following endocrine disorders are correctly matched with gland except A. Diabetes and pancreas B. Tetany and parathyroid C. Dwarfism and pituitary medulla D. Cretinism and adrenal E. Gigantism and pituitary

Explanation / Answer

Answer 1: C. (As explained below)

Phosphodiesterase breaks down cyclic AMP.

Answer 2: A. (As explained below)

Thyroid hormone exhibits permissive effect on the effects of GH, and increases it synthesis by the pituitary.

Answer 3: E. (As explained below)

Physical training will impact hormones - Insulin, Glucagon, Cortisol, Epinephrine and Norepinephrine, Testosterone, Human Growth Hormone, Insulin-like Growth Factor and Brain-derived Neurotrophic Factor. Pituitary tumor will reduce sex hormones luteinizing hormone (LH), follicle-stimulating hormone (FSH) and testosterone. Flying in an aeroplane may cause release of stress hormones like Adrenaline, Cortisol, Norepinephrine.

Answer 4: D. (As explained below)

Cretinism results due to untreated congenital deficiency of thyroid hormone.

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