Tag: biology

Questions Related to biology

What is blood pressure?

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

  1. The pressure of blood on the heart muscle

  2. The pressure of blood exerted on the walls of arteries and veins

  3. The pressure of blood on the walls of veins only

  4. The pressure of blood on the walls of arteries only

Show answer
Correct Option: B
Explanation:

The blood flows under great pressure in the arteries and veins. Blood pressure may be defined as the pressure exerted by the blood on the arteries and veins. It is measured by sphygmomanometer.

So, the correct answer is option B.

Normal blood pressure of human being must be

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

  1. 140/80mmHg

  2. 160/100mmHg

  3. 120/80mmHg

  4. 140/90mmHg

Show answer
Correct Option: C
Explanation:

Blood pressure is the pressure applied on the wall of the arteries and veins. The systolic phase applies greater pressure than the diastolic phase. Normal blood pressure of human being must be 120/80mmHg.

So, the correct answer is option C.

The diastolic pressure in a healthy person is ............... mm of Hg.

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

  1. $60$

  2. $80$

  3. $100$

  4. $120$

Show answer
Correct Option: B
Explanation:

The diastolic blood pressure measures the pressure in the arteries between heartbeats (when the heart muscle is resting between beats and refilling with blood). A normal diastolic blood pressure is 80mm of Hg.

So, the correct answer is option B.

Which one of the following is a correct matching pair?

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

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

  2. Dup - Sudden opening of semilunar valves at the beginning of ventricular diastole

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

  4. Purkinje fibers - Initiation of the heart beat

Show answer
Correct Option: A
Explanation:
First sound of heart is lubb (a long and booming sound), created by the closure of atrioventricular valves (AV), tricuspid and bicuspid at the beginning of ventricular systole. the second sound of heart is dupp which is short and sharp. The instrument used to hear heart sound is stethoscope.

Which one of the following is a matching pair of a certain body feature and it's value / count in a normal human adult?

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

  1. Urea - 5-10 mg/100 ml of blood

  2. Blood sugar (fasting) - 70-100 mg/100 ml

  3. Total blood volume - 5-6 ml

  4. ESR in Wintrobe method - 9-15 mm in males and 20-34 mm in females

Show answer
Correct Option: B
Explanation:
Normal human adult blood should contain between 6 to 20 mg of urea nitrogen per 100 ml (6–20 mg/dl) of blood.
The most commonly used screening tests are determination of the fasting blood glucose level and the blood glucose level tested two hours after a meal. The normal fasting blood sugar content is 70-110 mg per 100 ml of blood.
A typical adult has a blood volume of approximately 5 liters, with females generally having less blood volume than males. Blood volume is regulated by the kidneys.
Results from your ESR rate test will be reported in the distance in millimeters (mm) red blood cells have descended in one hour (hr). The normal range is 0-22 mm/hr for men and 0-29 mm/hr for women. 

Pressure exerted by blood against its walls of an artery during ventricular contraction is 

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

  1. Diastole

  2. Systole

  3. Cardiac Murmur

  4. None of the above

Show answer
Correct Option: B
Explanation:

The systole is a phase when the chambers of the heart relax and the blood is filled in the respective chambers. The pressure exerted by blood against its walls of an artery during ventricular contraction is systolic pressure. It is estimated as 120mm Hg.

So, the correct answer is option B.

The difference between systolic and diastolic pressure in human is

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

  1. $120$mm Hg

  2. $80$mm Hg

  3. $40$mm Hg

  4. $200$mm Hg

Show answer
Correct Option: C
Explanation:

Pulse pressure is the difference between the systolic and diastolic pressure readings. It is measured in millimeters of mercury (mmHg). It represents the force that the heart generates each time it contracts. Systolic pressure in human is 120 mm Hg and Diastolic pressure in human is 80 mm Hg. Therefore difference between them is 40mm Hg. 

Therefore, the correct answer is option C.

The normal systolic pressure is 

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

  1. 120 mm of Hg

  2. 80 mm of Hg

  3. 150 mm of Hg

  4. 50 mm of Hg

Show answer
Correct Option: A
Explanation:

Systolic pressure is measured in the arteries when the heart contracts and is 120 mm of Hg in a normal condition.

Diastolic pressure is measured when the heart is relaxed and it is 80 mm of Hg.
Values above or below them are considered abnormal.
So, the correct answer is ' 120 mm of Hg'.

Sphygmomanometer measure

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

  1. Nerve conduction rate

  2. Heart beat rate

  3. Blood pressure

  4. Pulse rate

Show answer
Correct Option: C
Explanation:

A sphygmomanometer is an instrument, attached to an inflatable air bladder cuff and used with a stethoscope, for measuring blood pressure in an artery. Systolic pressure is identified with the first of the continuous korotkoff sounds. Diastolic pressure is identified at the moment the korotkoff sounds disappear. 

So, the correct answer is option C.

Normal diastolic pressure in young man is about

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

  1. 20 mm Hg

  2. 80 mm Hg

  3. 100 mm Hg

  4. 130 mm Hg

Show answer
Correct Option: B