Tag: transportation in plants and circulation in animals

Questions Related to transportation in plants and circulation in animals

The least abundant cells in the human blood among the following are

bio-chemistry transportation in plants and circulation in animals role of blood in transport function of blood blood and lymph

  1. Neutrophils

  2. Monocytes

  3. Erythrocytes

  4. Eosinophils

Show answer
Correct Option: A

Most carbon dioxide in blood is in the form of

bio-chemistry transportation in plants and circulation in animals role of blood in transport function of blood blood and lymph

  1. carbon dioxide

  2. carbonic acid

  3. carbon monoxide

  4. hydrogencarbonate

Show answer
Correct Option: D
Explanation:

Carbon dioxide is transported in the blood from the tissue to the lungs in three ways: (i) dissolved in solution; (ii) buffered with bicarbonate and (iii) bound to proteins, particularly haemoglobin. Majority of the carbon dioxide in the blood is carried by means of a bicarbonate buffer system. So, the correct option is 'hydrogen carbonate'.

Each heart beat generates how many pulse in the arteries

biology transportation in plants and circulation in animals heart beat cardiac cycle heart, blood vessels and cardiac cycle

  1. Two

  2. Three

  3. One

  4. Five

Show answer
Correct Option: C
Explanation:

This sequential event in the heart which is cyclically repeated is called the cardiac cycle. Each cardiac cycle consists of systole and diastole of both the atria and ventricles. Each cardiac cycle represents one heartbeat. The number of heart beats per minute in resting person is called as normal heart rate. The normal heart rate is about 72 beats per minute. The heart rate is same as pulse rate because the contractions of the heart cause an increase in blood pressure in arteries that leads to noticeable pulse. Hence each heartbeat generates one pulse in the arteries.

So, the correct answer is 'One'.

When we are at rest what will happen to the heart beat?

biology transportation in plants and circulation in animals heart beat cardiac cycle heart, blood vessels and cardiac cycle

  1. Increase

  2. Decrease

  3. Remain same

  4. Firsts decrease and then increase

Show answer
Correct Option: C

The second heart sound (dubb) is associated with the closure of

biology transportation in plants and circulation in animals heart beat cardiac cycle heart, blood vessels and cardiac cycle

  1. Tricuspid valve

  2. Semilunar valves

  3. Bicuspid valve

  4. Tricuspid and bicuspid valves

Show answer
Correct Option: B
Explanation:
The closing of different valves in the heart produces different characteristic sound commonly known as the lub-dub sounds. The lub sound is the first sound of the heart. The dub sound is the second sound of the heart that is produced by the closing of the semilunar valves in the heart.
Thus, the correct answer is 'Semilunar valves.'

'X' is the rhythmic contraction and relaxation in the aorta and its main arteries. What is X?

biology transportation in plants and circulation in animals heart beat cardiac cycle heart, blood vessels and cardiac cycle

  1. Heart beat

  2. Heart rate

  3. Pulse

  4. Cardiac output

Show answer
Correct Option: C

If the systolic pressure is $120$mm Hg and diastolic pressure is $80$mm Hg, the pulse pressure is $80$mm Hg, the pulse pressure is ______.

biology transportation in plants and circulation in animals heart beat cardiac cycle heart, blood vessels and cardiac cycle

  1. $120\times80 = 9600$mm Hg

  2. $120+80 = 200$ mm Hg

  3. $120 - 80 = 40$mm Hg

  4. $\frac{120}{40} = 3$mm Hg

Show answer
Correct Option: C
Explanation:
The pulse pressure can be defined as the difference between the diastolic and systolic pressure of an individual’s heart. If the normal diastolic and systolic pressure of the adult human heart is 120 mm Hg and 80 mm Hg, respectively then the pulse pressure is 120 - 80 = 40 mm Hg.
Thus, the correct answer is '120−80=40mm Hg.'

An adult human with average health has systolic and diastolic pressures as

biology transportation in plants and circulation in animals heart beat cardiac cycle heart, blood vessels and cardiac cycle

  1. 120 mm Hg and 80 mm Hg

  2. 50 mm Hg and 80 mm Hg

  3. 80 mm Hg and 80 mm Hg

  4. 70 m Hg and 120 mm Hg

Show answer
Correct Option: A
Explanation:

Blood pressure is the pressure against the walls of the blood vessels produced by the discharge of blood into them by contraction of the left ventricle.

Systolic pressure: The temporary rise in BP during the contraction of the heart is called systolic pressure.
Diastolic pressure: The temporary fall in BP during the relaxation of the heart is termed as diastolic pressure.
For a healthy resting adult person, the average systolic/ diastolic pressures are 120/80 mm Hg in arteries near the heart.
So, the correct answer is '120 mm Hg and 80 mm Hg'.

Which one of the following is a matching pair?

biology transportation in plants and circulation in animals heart beat cardiac cycle heart, blood vessels and cardiac cycle

  1. Lubb - sharp closure of AV valves at the beginning of ventricular systole

  2. Dub - sudden opening of semilunar valves at the beginning of ventricular diastole

  3. Pulsation of the radial artery - valves in the blood vessels

  4. Initiation of the heart beat - Purkinje fibres

Show answer
Correct Option: A

The first heart sound is produced when

biology transportation in plants and circulation in animals heart beat cardiac cycle heart, blood vessels and cardiac cycle

  1. Intraventricular pressure decreases

  2. Semilunar valve snaps shut

  3. Bicuspid and tricuspid close quickly

  4. Diastole begins

Show answer
Correct Option: C
Explanation:

first heart sound is produced by the closing of the atrioventricular valves . The first heart sound, or S1, forms the "lub" of "lub-dub" and is composed of components M1 (mitral valve closure) and T1 (tricuspid valve closure). Normally M1 precedes T1 slightly. It is caused by the closure of the atrioventricular valves, i.e. tricuspid and mitral (bicuspid), at the beginning of ventricular contraction, or systole. So, the correct option is C.( Bicuspid and tricuspid close quickly )