Test 27   (physiology)
1. In iron deficiency anaemia, the following is decreased:
a. TIBC (total iron binding capacity)

b. MCV (mean cell volume) 

c. ferritin

d. MCH (mean cell haemoglobin)

e. MCHC (mean cell haemoglobin concentration)

2. The following are true about parathyroid hormone :

a.  it is an 84 amino acid peptide hormone

b. it increases calcium absorption from the gastrointestinal 

c. it acts on a cell surface receptor that increases intracellular 
    cyclic AMP 

d. it increases calcium release from bone 

e. it increases production of 1,25 dihydroxy-vitamin D3 in the 


3. Anti-diuretic diuretic hormone (ADH)
a. is synthesized by the posterior lobe of the pituitary gland

b. is released by neurosecretion

c. its secretion is increased by a low plasma osmolarity

d. increases the permeability of the distal convoluted tubule

e. its secretion is increased in early post-operative period


4. The following are true about the thyroid hormone
a. iodide ions enter the follicle cells by passive diffusion 

b .T4 and T3 bind to the receptors in nuclei 

c. thyroxine, once synthesized, is coupled to thyroglobulin 
    until released 

d. a greater proportion of tri-iodothyronine is formed when 
    iodine is deficient 

e. thyroid hormones increase the number of b receptors in 


5. True statements about aldosterone include: 
a. it increases the amount of Na+-K+ ATPase in the target 

b. it reduces the sodium content of the sweat 

c. it increases the acidity of urine 

d. it increases the potassium content of urine 

e. the basal secretion is normal even after hypophysectomy


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