Human Heart

Q.

Describe the function of heart.

Q. Explain Cardiac Cycle?
(5 marks)

Q.

Describe the evolutionary change in the pattern of heart among the vertebrates.

Q.

What is the specific function of the cardiac muscle?

Q.

What is the difference between the bicuspid valve and tricuspid valve?

Q.

What is the role of the septum in the heart?

Q.

Which organ pumps the blood throughout the human body?

Q.

Match Column I with Column II :

	Column I		Column II
(a)	Smooth muscle	(i)	Myoglobin
(b)	Tropomyosin	(ii)	Thin filament
(c)	Red muscle	(iii)	Sutures
(d)	Skull	(iv)	Involuntary

Q.

State four functions of the heart?

Q. In the diagram of the vertical section of human heart given below certain parts have been indicated by alphabets. Choose the answer in which these alphabets have been correctly matched with the parts they indicate.

1. A = Aorta,
   B = Pulmonary vein,
   C = Pulmonary arteries,
   D = Left ventricle,
   E = Semilunar valves,
   F = Left auricle,
   G = Right auricle,
   H = Superior vena cava,
   I = Right ventricle,
   J = Tricuspid valves,
   K = Inferior vena cava
2. A = Aorta,
   B = Pulmonary arteries,
   C = Pulmonary veins,
   D = Left auricle,
   E = Tricuspid and Mitral valves,
   F = Left ventricle,
   G = Right ventricle,
   H = Inferior vena cava,
   I = Right auricle,
   J = Semilunar valves,
   K = Superior vena cava
3. A = Aorta,
   B = Superior vena cava,
   C = Inferior vena cava,
   D = Right ventricle,
   E = Tricuspid and Mitral valves,
   F = Right auricle,
   G = Left auricle,
   H = Pulmonary vein,
   I = Left ventricle,
   J = Semilunar valves,
   K = Pulmonary artery
4. A = Aorta,
   B = Superior vena cava,
   C = Inferior vena cava,
   D = Left ventricle,
   E = Semilunar valves,
   F = Left auricle,
   G = Right auricle,
   H = Pulmonary artery,
   I = Right ventricle,
   J = Tricuspid valves,
   K = Pulmonary vein

Q.

The pace-setter for the heart is

1. Papillary muscles

2. Purkinje fibres

3. Sino-atrial node

4. Atrio-ventricular node

Q. The thread like tendons of papillary muscles inserted upon the flaps of tricuspid and bicuspid valves are called:

1. Chordae tendinae
2. Yellow elastin fibres
3. Reticulate fibres
4. Collagen fibres

Q.

What is the difference between vertebrates and chordates?

Q.

The muscles which are immune to fatigue are ________.

Q.

Are humans vertebrates?

Q.

Describe the evolutionary change in the pattern of heart among the vertebrates.

Q.

Do crocodiles have a four-chambered heart?

Q. AV node is found

1. in the right upper corner of right atrium
2. between right atrium and left ventricle
3. lower left corner of right atrium
4. both b and c are correct

Q.

What is the function of bicuspid valve in the heart?

Q. Blood vessel leading into Bowman's capsule are called

1. renal artery
2. efferent arteriole
3. afferent arteriole
4. renal vein

Q.

Difference between auricle and ventricle?

Q. Which of the following valves guards the entry of the superior vena cava into the right atrium?

1. Haversian valve
2. Eustachian valve
3. Thebesian valve
4. Tricuspid valve

Q. Diameter of the afferent arteriole in the glomerulus is the

1. there is no efferent vessel
2. same as that of efferent
3. smaller than that of efferent
4. larger than that of efferent

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

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

Q. Bundle of His is a network of:

1. Muscle fibres distributed throughout heart walls
2. Muscle fibres found only in ventricle wall
3. Nerve fibres distributed in ventricles
4. Nerve fibres found throughout the heart

Q.

How are the whales and fish similar to each other?

Q. Explain the difference between Bunodont , Lophodont , Selenodont , Secodont

Q. What is the connective tissue of nervous system ? Is it neuron or neuroglia

Q. The muscle which is under the voluntary control of the somatic nervous system is ____________

1. Smooth muscle

2. Cardiac muscle

3. Skeletal Muscle

4. Involuntary muscle

Q.

Write the difference between:
Red and White muscles