Biology : Body Fluids and Circulations

The duration of cardiac cycle is

• 0.8 s

• 0.8 µs

• 0.08 s

• 0.008 s

Rh factor can produce disease

• AIDS

• Turner's syndrome

• Erythroblastosis foetalis

• Sickle-cell anaemia

Most abundant mineral of animal body is

• iron (Fe)

• sodium (Na)

• potassium (K)

• calcium (Ca)

Red cell count is carried out by

• haemocytometer

• haemoglobinometer

• sphygmomanometer

• electrocardiogram

The blood does not clot inside the body because of

• oxygenation of blood

• movement of blood

• heparin in blood

• absence of fibrinogen in blood

Heparin is produced by

• kidney cells

• blood cells

• bone marrow

• Chief cell

Which one has the thickest wall?

• Right auricle

• Right ventricle

• Left auricle

• Left ventricle

The difference between systolic and diastolic pressure in human is

• 120 mm Hg

• 80 mm Hg

• 40 mm Hg

• 200 mm Hg

Which of the following statements is related to Starling's law of heart?

• Greater the stroke volume greater is the heart rate

• Greater the initial length of the cardiac muscle fibre, more is the force of contraction of hear

• Greater the minute volume, greater is the heart rate

• Lesser the length of cardiac muscle fibre greater is the force of contraction of heart

The cardiac cycle in normal subject is about

• 0.5 s

• 0.8 s

• 1.0 s

• 1.2 s