Hormones binding their receptors may result in ____________. a alteration of mem

Question

Hormones binding their receptors may result in ____________. a alteration of membrane permeability and or membrane potential b. activation of intracellular enzymes c inactivation of enzymes d. all of the above e only a & c Which of the following will result from prolonged "stress" on one's system? 1. Retention of Na^+ (and therefore water) by the kidneys 2. Elevated glucocorticoid levels 3. Elevated blood glucose levels; possibly progressing into Type II Diabetes Mellitus 4. Suppression of the immune system 5. Elevated aldosterone levels in the blood 6 Increased blood pressure (hypertension) due to excessive or elevated blood volume a 1, 3, 5, 6 b, 1, 2, 3, 5 c. 1, 2, 4, 5, 6 d 2, 3, 4, 5, 6 All of the above The hypothalamus functions in the _______. 1. control of body temperature 2. production of neurohypopbseal hormones 3. coordination of ANS 4. control of thirst & hunger 5. control of urine output 6. control of the adenohypophysis a. 1, 2, 3 b, 2, 4, 5, 6 c. 2, 3, 5 d 1.2, 4, 6 e. 1, 2, 3, 4, 5, 6 Which of the following formed elements are NOT living cells? 1. Neutrophils 2 Erythrocytes 3. Basophils 4. Thrombocytes 5. Eosinophils 6. Lymphocytes a. 1, 3, 5 b. 2, 4, 6 c. 1.2, 3, 5 d Only 2 & 4 e All of the above

Explanation / Answer

Hormones, upon binding with their specific receptors cause change in behavior of their target cells.

Usually hormones classified under proteins, peptides, catecholamines and eicosanoids bind to receptors located on the cell surface, such as on plasma membranes. Their binding causes release of second messengers that can alter activities of molecules of other enzymes within the cells.

Hormones like steroids and thyroid hormones bind to receptors which are within the cell like in the cytoplasm or nucleus. Their binding results into transcriptional activity of responsive genes.

So the correct answer for the Q77 is b. activation of intracellular enzymes.

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