Body Fluids and Circulations

If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect? 

• The flow of blood into the aorta will be slowed down

• The 'pacemaker' will stop working

• The blood will tend to flow back into the left atrium

• The blood will tend to flow back into the left atrium

What is true about RBCs in humans?

• They carry about 20-25 percent of CO₂

• They transport 99.5 percent of O₂

• They transport about 80 percent oxygen only and the rest 20 percent of it is transported in dissolved state in blood plasma

• They transport about 80 percent oxygen only and the rest 20 percent of it is transported in dissolved state in blood plasma

The haemoglobin content per 100 mL of blood of a normal healthy human adult is 

• 5-11 g

• 25-30 g

• 17-20 g

• 17-20 g

Jaundice is a disorder of 

• excretory system

• skin and eyes

• digestive system

• digestive system

ABO blood grouping is controlled by gene I, which has three alleles and show codominance, There are six genotypes. How  many phenotypes in all are possible.?

• Six

• Three

• Four

• Four

In a standard ECG, which one of the following alphabets is the correct representation of the respective activity of the human heart?

• R-repolarisation of ventricles

• S- start of systole

• T -end of diastole

• T -end of diastole

Compared to blood our Lymph has

• no plasma

• plasma without proteins

• more WBCs and no RBCs

• more WBCs and no RBCs

The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC, because 'O' in it refers to having

• other antigens besides A and B on RBCs

• over dominance of this type on the genes for A and B types

• one antibody only-either anti-A or anti- B on the RBCs

• one antibody only-either anti-A or anti- B on the RBCs

Globulins contained in human blood plasma are primarily involved in 

• defence mechanisms of the body 

• the osmotic balance of body fluids

• oxygen transport in the blood

• oxygen transport in the blood

The blood calcium level is lowered by the deficiency of 

• parathormone

• thyroxine

• calcitonin

• calcitonin