(no title)

 41. PQ interval gets lengthened during

A. Rheumatic fever

B. Arteriosclerotic heart (plaque formation)

C. Arteriosclerotic heart (calcification)

D. All of these

Answer: D

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42. William Harvey is known for the discovery Of

A. Blood transfusion

B. Blood clotting

C. Blood circulation

D. Blood purification

Answer: C

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43. Which one of the following does not have

an open circu-latory system?

A. Chelone

B. Cockroach

C. Frog's tadpole

D. Both(1)and(3)

Answer: D

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44. The heart of a crocodile consists of

A. A single auricle and two ventricles

B. Two auricles and a single ventricle

C. Two auricles and two ventricles

D. Asingle auricle and a single ventricle

Answer: C

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45. Which of the following has myogenic

heart?

A. Frog

B. Humans

C. Rabbit

D. All of the above

Answer: D

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46. Purkinje's fibres are special types of

A. Muscle fibers located in heart

B. Nerve fibers located in cerebrum

C. Connective tissue fibers joining one

bone to another bone

D. Sensory fibers extending from retina

into optic nerve

Answer: A

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47. The regulation of heartbeat in mammals is

due to

A. The volume of blood in the circulatory

system

B. The presence of excess of oxygen in

blood

C. The presence of thyroxine in blood

D. The presence of pacemaker in the heart

Answer: D

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48. The first heart sound is

A. "Lub"sound at the end of systole

B. "Dub"sound at the end of systole

C. "Lub" sound at the end of systole

D. "Dub"sound at the beginning of systole

Answer: C

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49. Which one of the following statements is

correct regarding blood pressure ?

A. 190/110 mm Hg may harm vital organs

like brain and kidney

B. 130/90 mm Hg is considered hight and

requires treatment

C. 100/55 mm Hg is considered an ideal

blood pressure

D. 105/50 mm Hg makes one very active

Answer: A

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50. Which one of the following plasma protein

is involved in the coagulation of blood ?

A. Fibrinogen

B. an albumin

C. serum amylase

D. a globulin

Answer: A

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