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Which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?

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Important Questions on Body Fluids and Circulation

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Alpha Question Bank for Medical: Biology>Chapter 18 - Body Fluids and Circulation>Exercise-4>Q 4
Which of the following has highest pH?
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Alpha Question Bank for Medical: Biology>Chapter 18 - Body Fluids and Circulation>Exercise-4>Q 7

Assertion: Saline water is not given to patients with hypertension.

Reason: Saline water can cause vomiting and may drop blood pressure suddenly, causing cardiac arrest.

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Alpha Question Bank for Medical: Biology>Chapter 18 - Body Fluids and Circulation>Exercise-4>Q 19
In humans, blood passes from the post caval to the diastolic right atrium of heart due to
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Alpha Question Bank for Medical: Biology>Chapter 18 - Body Fluids and Circulation>Exercise-4>Q 20
The haemoglobin of a human foetus
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Alpha Question Bank for Medical: Biology>Chapter 18 - Body Fluids and Circulation>Exercise-4>Q 21
If heart becomes partially nonfunctional due to injury, in chordae tendineae of tricuspid valve, the immediate effect will be
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Alpha Question Bank for Medical: Biology>Chapter 18 - Body Fluids and Circulation>Exercise-4>Q 22
ABO blood groups in humans are controlled by the gene I. It has three alleles – IA, IB and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?
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Alpha Question Bank for Medical: Biology>Chapter 18 - Body Fluids and Circulation>Exercise-4>Q 23

The haemoglobin content per $100 \mathrm{ml}$ of blood of a normal healthy adult is 

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Alpha Question Bank for Medical: Biology>Chapter 18 - Body Fluids and Circulation>Exercise-4>Q 24
Given below are four statements (a-d) regarding the human blood circulatory system:

a. Arteries are thick-walled and have narrow lumen as compared to veins.
b. Angina is acute chest pain when the blood circulation is reduced
c. Persons with blood group AB can donate blood to any person with any blood group under the ABO system.
d. Calcium ions play a very important role in blood clotting


Which two of the above statements are correct?