NEET UG 2010 — Body Fluids and Circulation

What is true about RBCs in humans?

Given below are four statements (A-D) regarding human blood circulatory system A. Arteries are thick-walled and have narrow lumen as compared to veins. B. Angina is acute chest pain when the blood circulation to the brain is reduced. C. Persons with blood group-AB can donate blood to any person with any blood group under $\mathrm{ABO}$ system. D. Calcium ions play a very important role in blood clotting. Which two of the above statements are correct?

Fastest distribution of some injectible material/medicine and with no risk of any kind can be achieved by injecting it into the

The haemoglobin content per $100 \mathrm{~mL}$ of blood of a normal healthy human adult is

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?