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16
MCQ (Single Correct Answer)

Read the following statements and choose the correct option.

Statement I Atria receive blood from all parts of the body which subsequently flows to ventricles.

Statement II Action potential generated at sino-atrial node passes from atria to ventricles.

A
Action mentioned is statement I is dependent on action mentioned in Statement II
B
Action mentioned in statement II is dependent on action mentioned in Statement I
C
Action mentioned in statement I and II are independent of each other.
D
Action mentioned in statement I and II are synchronous.
17
Name the blood component which is viscous and straw coloured fluid.
Explanation
Blood is a special connective tissue consisting of a fluid matrix, plasma and cells. Plasma is a straw coloured, viscous fluid constituting of nearly $55 \%$ of the blood, $90-92 \%$ of plasma is water and proteins contributes approx $6-8 \%$. The plasma proteins contains fibrinogen, globulins and albumins.
18

Complete the missing word in the statement given below

(a) Plasma without ............ factors is called serum.

(b) .............. and monocytes are phagocytic cells.

(c) Eosinophils are associated with ............. reactions.

(d) ............ ions play a significant role in clotting.

(e) One can determine the heart beat rate by counting the number of ............ in an ECG.

Explanation

(a) Plasma without clotting factors is called serum.

(b) Neutrophils and monocytes are phagocytic cells.

(c) Eosinophils are associated with allergic reactions.

(d) Calcium ions play a significant role in clotting.

(e) One can determine the heart beat rate by counting the number of QRS complex in an ECG.

19

Given below is the diagrammatic representation of a standard ECG. Label its different peaks.

Explanation

The representation of a standard ECG diagram

20
Name the vascular connection that exists between the digestive tract and liver.
Explanation
The unique vascular connection that, exists between the digestive tract and liver is called hepatic portal system.
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