Circulation of Body Fluids

Question 1

Atrioventricular valves are supported by strands of connective tissue called ______.

A	endocardium
B	myocardium
C	chordae tendineae
D	cardiac fibers

Question 2

Which one of the followings refers to blood cancer characterized by uncontrolled proliferation of abnormal/immature white blood cells in the bone marrow?

A	Hypertension
B	Atherosclerosis
C	Leukemia
D	Pulmonary embolism

Question 3

Consider the following statements about biomedical technologies:

(a) During open heart surgery blood is circulated in the heart-lung machine

(b) Blockage in coronary arteries is removed by angiography

(c) Computerised Axial Tomography (CAT) shows detailed internal structure as seen in a section of body

(d) X-ray provides clear and detailed images of organs like prostate glands and lungs

Which two of the above statements are correct?

A	(a) and (b)
B	(b) and (d)
C	(c) and (d)
D	(a) and (c)

Question 4

Given below is the ECG of a normal human. Which one of its components is correctly interpreted below?

A	Peak P and Peak R together – systolic and diastolic blood pressures
B	Peak P – Initiation of left atrial contraction only
C	Complex QRS – One complete pulse
D	Peak T – Initiation of total cardiac contraction

Question 5

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

A	Monocytes
B	Neutrophils
C	Basophils
D	Eosinophils

Question 6

What is true about RBCs in humans?

A	They do not carry CO2 at all
B	They carry about 20-25 percent of CO2
C	They transport 99.5 percent of O2
D	They transport about 80 percent oxygen only and the rest 20 percent of it is transported in dissolved state in blood plasma

Question 7

If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?

A	The flow of blood into the pulmonary artery will be reduced
B	The flow of blood into the aorta will be slowed down
C	The pacemaker will stop working
D	The blood will tend to flow back into the left atrium

Question 8

The cells lining the blood vessels belong to the category of

A	Columnar epithelium
B	Connective tissue
C	Smooth muscle tissue
D	Squamous epithelium

Question 9

In humans, blood passes from the post caval to the diastolic right atrium of heart due to:

A	Pressure difference between the post caval and atrium
B	Pushing open of the venous valves
C	Suction pull
D	Stimulation of the sino auricular node

Question 10

The most active phagocytic white blood cells are:

A	Neutrophils and monocytes
B	Neutrophils and eosinophils
C	Lymphocytes and macrophages
D	Eosinophils and lymphocytes

Question 11

To obtain a standard ECG, a patient is connected to the machine with three electrodes

A	One to each wrist and to the left ankle
B	One to each ankle and to the left wrist
C	One to each wrist and to the left chest region
D	One to each ankle and to the left chest region

Question 12

The blood does not clot inside the body because of :

A	Oxygenation of blood
B	Movement of blood
C	Heparin in blood
D	Absence of fibrinogen in blood

Question 13

Which is the correct sequence of arrangement of types of W.B.C. in decreasing order in terms of number per mm3 of human blood?

A	Eosinophils > Basophils > Neutrophils
B	Basophils > Eosinophils > Neutrophils
C	Neutrophils > Eosinophils > Basophils
D	Eosinophils > Neutrophils > Basophils

Question 14

The blood calcium level is lowered by the deficiency of:

A	Calcitonin
B	Parathormone
C	Thyroxine
D	Both Calcitonin and Parathormone

Question 15

The average diameter of Red Blood Corpuscles of man is

A	7.2 μm
B	8.1 μm
C	9.2 μm
D	10.3 μm