If due to some injury, the chordae tendineae of the tricuspid valve of the human heart are partially non-functional, what will be the immediate effect?
1. The blood will tend to flow back into the left atrium
2. The flow of blood into the pulmonary artery will be reduced
3. The flow of blood into aorta will be slowed down
4. The pacemaker will stop working

Veins are said to have a higher ____ than arteries because they expand more easily and a higher ___________ because they contain more blood.
1. compliance; capacitance
2. elasticity; compliance
3. elasticity; capacitance
4. None of the above

Assertion: Veins under skin appear blue in color.
Reason: All veins carry deoxygenated blood.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Also sometimes called as the ‘widow maker’ the anterior interventricular artery is a branch of the
1. left circumflex artery.
2. right anterior descending artery.
3. left coronary artery.
4. right coronary artery.

Assertion: Veins are also called "capacitance vessels".
Reason: Most veins have valves to prevent backflow of blood.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.