Body Fluids and Circulation - Online Test

Q1. In our blood :

i. Granulocytes which constitutes maximum percentage of total leucocytes are neutrophils.
ii. Elevated number of neutrophils in blood indicates an acute infection such as appendicitis.
Answer : Option B
Explaination / Solution:

In human blood, granulocytes and agranulocytes types of leucocytes are present. Neutrophils constitute the maximum percentage of total WBCs. Sharp increase in number of neutrophils in blood indicates an acute infection such as appendicitis.

Q2. The following pie chart shows four components of blood plasma represented from first to fourth Qtr and the correct sequence will be :

Answer : Option B
Explaination / Solution:

90-92 per cent of plasma is water and proteins contribute 6-8 per cent of it. Plasma also contains small amounts of minerals and other materials such as glucose, amino acids, lipids, etc., arealso present in the plasma.

Q3. When blood clot starts contracting, a pale yellow fluid starts oozing out. Its name and composition is :
Answer : Option D
Explaination / Solution:

Plasma without the clotting factors is called serum. The clotting factors include fibrinogen and blood corpuscles.

Q4. Ramesh has Rh antigen and Anti-A as well as Anti-B antibodies in his blood. During blood transfusion he can receive blood from :
Answer : Option D
Explaination / Solution:

Since he has both antibodies A and Band has Rh antigen and hence has O+ blood group. So, he can receive blood from O-positive blood group.

Q5. Which of the following represent examples of extracellular fluids?
Answer : Option B
Explaination / Solution:

Tissue fluid( lymph) and blood plasma represents the extracellular fluids. Lymph flows in lymphatic vessels and plasma in arteries and veins along with RBC, WBC and platelets.

Q6. The specialised patch of modified heart muscles from where contraction initiates, is/are :
Answer : Option C
Explaination / Solution:

The nodal musculature has the ability to generate action potentials without any external stimuli. The number of action potentials that could be generated in a minute vary at different parts of the nodal system. The SAN can generate the maximum number of action potentials and is responsible for initiating and maintaining the rhythmic contractile activity of the heart. Therefore, it is called the pacemaker.

Q7. The statement incorrect about human heart is :
Answer : Option D
Explaination / Solution:

Human being is triploblastic. The different organs are evolved from different layers of foetus. Human heart is derived from mesoderm.

Q8. The layer of heart pericardium which checks its overstretching and overfilling as well as also protects heart from mechanical injury is :
Answer : Option C
Explaination / Solution:

Pericardium is protective covering of heart. Pericardium is made of different layers to perform different functions. The layer of heart pericardium which checks its overstretching and overfilling as well as protects heart from mechanical injury is fibrous pericardium.

Q9. Which of the following is correctly matched?
Answer : Option B
Explaination / Solution:

The T-wave represents the return of the ventricles from excited to normal state.

Q10.

Read the following :

i. Blood vessels include arteries and veins. Arteries carry blood from heart to body parts and veins bring back blood from body parts to heart.
ii. The blood vessel which carry blood from heart to lungs is pulmonary artery and it carries oxygenated blood.


Answer : Option A
Explaination / Solution:

Blood vessels includes arteries and veins. Arteries carry blood from heart to body parts and veins bring back blood from body parts to heart. Pulmonary artery carry deoxygenated blood.