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Blood group 'O' negative is called universal donor, because it

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Important Questions on Body Fluids and Circulation

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Biology Crash Course NEET>Chapter 18 - Body Fluids and Circulation>Level 2>Q 34

Read the following statements.

(i) The nodal musculature of the heart has the ability to generate action potentials without any external stimuli.
(ii) The AV node is located in the right ventricle, close to the AV septum.
(iii) The stroke volume is the amount of blood pumped out by each ventricle per minute.

Which of these is/are correct?

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Biology Crash Course NEET>Chapter 18 - Body Fluids and Circulation>Level 2>Q 35
During each heart beat ventricles pump about 70 ml of blood. This is called
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Biology Crash Course NEET>Chapter 18 - Body Fluids and Circulation>Level 2>Q 36
Heart pumps blood more forcefully in older persons than younger ones due to
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Biology Crash Course NEET>Chapter 18 - Body Fluids and Circulation>Level 2>Q 37
When the ventricular pressure is low, these valves get closed:
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Biology Crash Course NEET>Chapter 18 - Body Fluids and Circulation>Level 2>Q 38
Plasma
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Biology Crash Course NEET>Chapter 18 - Body Fluids and Circulation>Level 2>Q 39
Rh factor was discovered by
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Biology Crash Course NEET>Chapter 18 - Body Fluids and Circulation>Level 2>Q 40
A certain road accident patient with unknown blood group needs immediate blood transfusion. One of his doctor friend at once offers his blood. What was the blood group of the donor?
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Biology Crash Course NEET>Chapter 18 - Body Fluids and Circulation>Level 3>Q 1
Read the following statements and select the correct option.
Statement 1: The SA node acts as pacemaker.
Statement 2: The SA node is located in the wall of the right atrium near the interatrial septum.