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Multiple choice biology human body and organ system blood pressure circulatory system transportation in animal and plants

In normal blood pressure of 120/80 mm Hg, the numerator represents

  1. Diastolic pressure

  2. Systolic pressure

  3. Pulse pressure

  4. Cardiac index.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a blood pressure reading of 120/80, the top number (120) is the systolic pressure, which is the pressure during heart contraction. The bottom number (80) is the diastolic pressure.

Multiple choice biology human body and organ system blood pressure circulatory system transportation in animal and plants

First sound recorded in sphygmomanometer indicates

  1. Systolic pressure

  2. Diastolic pressure

  3. Lubb

  4. Dup.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When using a sphygmomanometer, the first sound heard (Korotkoff sound) as the cuff pressure is released corresponds to the systolic pressure. This is when the blood first begins to flow through the artery again.

Multiple choice biology human body and organ system blood pressure circulatory system transportation in animal and plants

Hypertension is not caused by

  1. Anaemia

  2. Atheroclerosis

  3. Obesity

  4. Arteriosclerosis.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hypertension is often caused by factors that narrow or harden arteries, such as atherosclerosis or arteriosclerosis, or by obesity. Anaemia is a condition characterized by a lack of red blood cells, which typically does not cause hypertension.

Multiple choice biology human body and organ system blood pressure circulatory system transportation in animal and plants

Systolic pressure is 120 mm Hg. Diastolic pressure is 80 mm Hg. Pulse pressure is

  1. 120 $\times$ 80 = 9600 mm Hg

  2. 120 + 80 = 200 mm Hg

  3. 120 - 80 = 40 mm Hg

  4. 120/80 = 1.5 mm Hg.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pulse pressure is calculated as the difference between the systolic pressure and the diastolic pressure. Here, 120 - 80 = 40 mm Hg.

Multiple choice biology human body and organ system blood pressure circulatory system transportation in animal and plants

Blood pressure in the pulmonary artery is

  1. Less than that in venae cavae

  2. Same as that in aorta

  3. More than that in carotid

  4. More than that in pulmonary vein.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pulmonary artery carries deoxygenated blood from the heart to the lungs. Its pressure is higher than that of the pulmonary vein, which carries oxygenated blood back to the heart at a much lower pressure.

Multiple choice biology human body and organ system blood pressure circulatory system transportation in animal and plants

Choose the correct answer from the alternatives given.
Normal blood pressure of a- healthy person is:

  1. 120/100

  2. 110/90

  3. 120/80

  4. 120/90
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Blood pressure is the pressure which is exerted by blood against the wall of the arteries. 
  • The average pressure produced in the ventricles when they contract and the blood is pumped into the aorta and the pulmonary artery is known as the systolic pressure, it is equal to the pressure exerted by a column of 120 mm of mercury. 
  • The average pressure produced in the ventricles when they relax and are filled with blood is known as the diastolic pressure, it is about 80 mm of mercury. Hence the value of blood pressure in an adult is about 120/80.
  • The blood pressure is measured by an instrument known as the sphygmomanometer.
So, the correct option is '120/80'.