Multiple Choice QuestionsWhich one of the following is a matching pair of a certain body feature and its value/count in a normal human adult?
Urea- 5 - 10 mg/100 ml of blood
Blood sugar (fasting) - 80 - 100 mg/100 ml
Total blood volume - 3 - 4 litres
ESR in Wintrobe method - 9 -15 mm in males and 20 - 34 mm in females
Which one of the following is a matching pair?
Lubb - sharp closure of AV valves at the beginning of ventricular systole
Dup - sudden opening of semilunar valves at the beginning of ventricular diastole
Pulsation of the radial artery - valves in the blood vessels
Initiation of the heart beat - Purkinje fibres
A.
Lubb - sharp closure of AV valves at the beginning of ventricular systole
The gradually increasing contraction of ventricular muscles during systole first causes the closure of bicupsid and tricupsid valves (AV valves), producing a low- pitched "lubb" sound. Later, it causes the opening of the semilunar valves of systemic and pulmonary aorta. At the end of ventricular systole, semilunar valves shut, producing the second, louder heart sound, the "dup". Thus, each heart beat is accompained by a "lubb- dup" sound.
A person passes much urine and drinks much water but his blood glucose level is normal. This condition may be the result of:
a reduction in insulin secretion from pancreas
a reduction in vasopressin secretion from posterior pituitary
a fall in the glucose concentration in urine
an increase in secretion of glucagon
An example of competitive inhibition of an enzyme is the inhibition of:
succinic dehydrogenase by malonic acid
cytochrome oxidase by cyanide
hexokinase by glucose-6-phosphate
carbonic anhydrase by carbon dioxide
Excessive stimulation of vagus nerve in humans may lead to:
hoarse voice
peptic ulcers
efficient digestion of proteins
irregular contractions of diaphragm
A person is wearing spectacles with concave lenses for correcting vision. While not using the glasses, the image of a distant object in his case will be formed
on the blind spot
behind the retina
in front of the retina
on the yellow spot
The source of somatostatin is same as that of
thyroxine and calcitonin
insulin and glucagon
somatotropin and prolactin
vasopresin and oxytocin
People recovering from long illness are often advised to include the alga Spirulina in their diet because it
makes the food easy to digest
is rich in proteins
has antibiotic properties
restores the intestinal microtlora
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