Heart

Q.

What is the weight of heart?

Q.

The exchange of gases in the alveoli of the lungs takes place by

1. active transport

2. passive transport

3. simple diffusion

4. osmosis

Q.

Name the different types of xylem cells.

Q.

The vein which carries blood, from various parts of the body, into the right atrium is called____.

1. aorta

2. venules

3. arterioles

4. vena cava

Q.

What divides left side of the heart from its right side?

1. Atrium

2. Ventricle

3. Septum

4. Aorta

Q. A patient went to see a cardiologist complaining about being tachycardic. Upon examination, his heart rate was found to be 90 beats per minute; his end-diastolic volume was found to be 140 mL per minute whereas his end-systolic volume was 60 mL per minute. What was his calculated cardiac output per minute?

एक रोगी टेकीकार्डिएक की शिकायत लेकर हृदयरोगविशेषज्ञ के पास गया। जाँच करने पर उसकी हृदय दर 90 स्पंद प्रति मिनट पायी गई थी, उसका अंत्य अनुशिथिलन आयतन 140 मिली. प्रति मिनट जबकि उसका अंत्य प्रकुंचन आयतन 60 मिली. प्रति मिनट पाया गया था। उसका प्रति मिनट परिकलित हृदय निकास क्या था?

Q. Draw neat and labeled diagram of Internal structure of heart.

Q.

How do fishes cope up with two chambered heart where oxygenated and deoxygenated blood mixes up unlike mammals which have four chambered heart for efficient flow of blood?

1. Fishes do not require energy to maintain body’s temperature.

2. Fishes have efficient gills.

3. Fishes can store more energy than mammals.

4. Fishes do not have complex body structure like mammals.

Q.

Valves are present to prevent backflow of blood in the heart.

1. True

2. False

Q.

Which of these statements is NOT true about the heart?

1. The heart is situated between the two lungs in the mediastinum.

2. The heart is a pear shaped hollow organ.

3. The apex of the heart always rests on the diaphragm.

4. The heart develops from the ectoderm.

Q. In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?

1. Amphibians and reptiles
2. Amphibians only
3. Pisces only
4. Pisces and amphibians

Q.

What could be the possible explanation for the evolution of four-chambered heart in mammals as opposed to two-chambered heart in fishes?

1. Fishes do not require energy to maintain body’s temperature.

2. Fishes have efficient gills.

3. Fishes do not have complex body structure like mammals.

4. Fishes can store more energy than mammals.

Q.

The pulmonary artery carries:

1. Deoxygenated blood to the brain

2. Deoxygenated blood to the lungs

3. Oxygenated blood to the brain

4. Oxygenated blood to the lungs

Q.

The right side of the heart deals with

1. Mixture of oxygenated and deoxygenated blood.

2. Either a or b at a time

3. Oxygenated blood.

4. Deoxygenated Blood

Q. Rhythmic contraction and relaxation of heart muscles is known as:

1. Breathing rate
2. Exhalation rate
3. Heart beat
4. Inhalation rate

Q. _______ have moist skin with a three chambered heart.

1. Frogs
2. Fish
3. Humans
4. Dogs

Q.

Why does the chamber of the heart have thick walls?

Q.

Which one of the following is a true fish?

1. Star fish

2. Fin fish

3. Jelly fish

4. Shell fish

Q. Name the body structure concerned with the given functional activity:

(b) Transports oxygen to the body cells.

Q.

Why is it important to study other animals and understand their body functions?

1. To understand how our body functions comparitively

2. To understand how to become like them

3. To determine which the better animal is

4. No particular reason

Q. The rhythmic contraction and relaxation of muscles in the alimentary canal is known as ____ .

1. reflex
2. paralysis
3. peristalsis
4. osmosis

Q.

The bicuspid valve is present between the left atrium and left ventricle

1. True
2. False

Q.

A heart has some special structural design to act as a pump. It has _________ which contracts and relaxes rhythmically to produce pump-like action.

1. 3 atria and 1 ventricle

2. 1 atrium and 3 ventricles

3. 2 atria and 2 ventricles

4. 1 atrium and 2 ventricles

Q. The heart is protected by a two-layered membrane called ________ .

1. ventricle​
2. plasma​
3. atrium
4. pericardium​

Q.

Name the following :

The largest artery in our body.

Q.

The heart beats at an average of ____times/minute.

1. 68

2. 70

3. 72

4. 74

Q.

The chamber(s) of the heart that receives blood first in the cardiac cycle is:

1. Atrium

2. Ventricle

3. Vena cava

4. None of these

Q.

Question 42
Classify the following based on number of chambers in their heart.
Rohu, Scoliodon, Frog, Salamander, Flying lizard, King Cobra, Crocodile, Ostrich, Pigeon, Bat, Whale

Q. Select the incorrect statement about pumping of blood by the human heart:

1. Carbon dioxide rich blood is sent to the heart by the lungs.
2. Carbon dioxide rich blood is sent to the heart by all the organs.
3. Oxygenated and deoxygenated blood are separated.
4. Deoxygenated blood is the same as carbon dioxide rich blood.

Q. The rhythmic contraction and relaxation of muscles in the alimentary canal is known as ____ .

1. reflex
2. osmosis
3. peristalsis
4. paralysis