Valves in Heart

Q. What is the amount of $O_2$ supplied to tissues through every $100mL$ of oxygenated blood under normal physiological conditions?

Q.

Give reason for wall of left ventricle is thicker than right ventricle.

Q.

Which of the following statement(s) is/are true about the heart?

1. The left atrium receives oxygenated blood from different parts of the body while the right atrium receives deoxygenated blood from the lungs.

2. The left ventricle pumps oxygenated blood to different body parts while the right ventricle pumps deoxygenated blood to the lungs.

3. Left atrium transfers oxygenated blood to the right ventricle which sends it to different body parts.

4. The right atrium receives deoxygenated blood from different parts of the body while the left ventricle pumps oxygenated blood to different parts of the body.

Q.

Why do ventricles have thicker walls than auricles?

Q.

Which is the second heart of the human body?

Q.

What is urethra? What is its function?

Q. Thebesian valve is present between

1. inferior vena cava and right atrium
2. superior vena cava and right atrium
3. coronary sinus and right atrium
4. pulmonary vein and left atrium

Q.

The heart of human is

1. Myogenic

2. Cardiogenic

3. Neurogenic

4. Digenic

Q.

Which of the following is not a part of the nephron

1. glomerulus

2. alveoli

3. bowmans capsule

4. convoluted tubules

Q. Which of the following statements is CORRECT?

1. Valves are absent between pulmonary veins and left atrium
2. Thebesian valve guards the opening of inferior vena cava to the right atrium
3. Mitral valve has three cusps which prevent the backflow of blood.
4. The opening of the superior vena cava into the right atrium is guarded by the Eustachian valve.

Q. Why valves are absent in arteries

Q. $C{O}_2$ dissociates from carbaminohemoglobin when

1. $pC{O}_2$ and $p{O}_2$ are equal
2. $p{O}_2$ is high and $pC{O}_2$ is low
3. None of the above
4. $pC{O}_2$ is high and $p{O}_2$ is low

Q.

The valves which allow blood to flow from the ventricles into the arteries and not in the opposite direction are:

1. Semilunar valve and tricuspid valve

2. Bicuspid and tricuspid valve

3. A.V valve (Atrioventricular valve) and semilunar valve

4. Aortic valve and mitral valve

Q.

The sequence of action potential propagation through the heart is _______

1. Sinoatrial node, atrioventricular node, atrioventricular bundle, bundle of his, Purkinje fibers.

2. Atrioventricular node, sinoatrial node, atrioventricular bundle, bundle of his, Purkinje fibers.

3. Atrioventricular bundle, atrioventricular node, sinoatrial node, bundle of his, Purkinje fibers.

4. Purkinje fibers, atrioventricular bundle, atrioventricular node, sinoatrial node, bundle of his.

Q.

Mitral valve in mammals guard the opening between

1. Left atrium and left ventricle

2. Stomach and intestine

3. Pulmonary vein and left atrium

4. Right atrium and right ventricle

Q. Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The first sound is heard when:

1. Ventricular walls vibrate due to pushing in of blood from atria
2. Semilunar valves are closed
3. AV node receives signal from SA node
4. The tricuspid and bicuspid valves are closed

Q.

What happens during the isovolumic phase of the ventricular systole?

Q. Valve surrounding opening of coronary sinus is

1. Thebesian valve
2. Semilunar valves
3. Tricuspid valve
4. Mitral valve

Q.

Write the full form of SAN. What is its other name?

Q. Thebesian valve is present between

1. inferior vena cava and right atrium
2. superior vena cava and right atrium
3. coronary sinus and right atrium
4. pulmonary vein and left atrium

Q. The ends of chordae tendineae are attached to

1. auriculoventricular valves and ventricular walls
2. auriculoventricular valves and bundle of His
3. auriculoventricular valves and atrial walls
4. auriculoventricular valves and papillary muscles

Q. __________ are a pair of pea-shaped exocrine glands located posterolateral to the membranous urethra.

1. Meibomian gland
2. Prostate gland
3. Perineal gland
4. Cowper’s gland

Q. The second heart sound (dub) is associated with the closure of:

1. Tricuspid valves
2. Bicuspid valves
3. Semilunar valves
4. Tricuspid and bicuspid valves

Q. In the cardiac conduction system, least conduction velocity is seen in

1. bundle of His
2. ventricular myocardial fibers
3. AV node
4. Purkinje fibers

Q.

List the three steps of urine formation.

Q.

Assertion[A]: Atria and ventricles do not contract at the same time.

Reason[R]: This time delay allows proper filling of all the 4 chambers of the heart and results in an efficient pumping of blood.

1. A is true and R is false.

2. Both A and R are true and R is correct explanation of A.

3. Both A and r are true but R is not correct explanation for A.

4. R is true and A is false.

Q.

What is true about veins?

1. All veins carry oxygenated blood

2. All veins carry deoxygenated blood

3. Veins carry blood away from the heart

4. Veins carry blood towards the heart

Q.

Where is the bicuspid valve located in our body?

Q. Mitral valve prevents the backflow of blood from ____________ to _____________.

1. aorta, left ventricle
2. left ventricle, left atrium
3. right atrium, right ventricle
4. left atrium, left ventricle

Q.

Name the following
The organ in humans concerned with maintenance of water balance in body.