FREE NEET Biology Practice MCQ Test: Body Fluids And Circulation Exercise 2 Questions Answers With Detailed Explanations [PDF]

Answer: (b)

Answer: (d)

Answer: (d)

Globulins in human blood plasma are primarily involved in defence mechanisms of body. Globulins like immunoglobulins act as antibodies that destroy bacteria, viruses and toxic substances that may enter into the blood from outside.

Answer: (d)

Tricuspid valve is the valve in the heart between the right atrium and right ventricle. It consists of three cusps that channel the flow of blood from the atrium to the ventricle. When the right ventricle contracts, forcing blood into the pulmonary artery, the tricuspid valve closes the aperture to the atrium, thereby preventing any backflow of blood. The valve reopens to allow blood to flow from the atrium into the ventricle. Thus, if tricuspid valve is partially non-functional the flow of blood into the pulmonary artery will be reduced.

Answer: (c)

Answer: (b)

Maximum amount of oxygen is lost from the blood in the capillaries surrounding the tissue cells. Capillaries are the smallest blood vessels that make up the microcirculation. Their endothelial linings are only one cell layer thick. These microvessels connect arterioles and venules, and help to enable the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between the blood and the tissues surrounding them.

Answer: (b)

Answer: (b)

Answer: (b)

The term angina means chest pain. In this disease, enough oxygen does not reach the heart muscles. The patient experiences heart pain usually in front of the chest. AB blood group person have both antigens A and B, but do not have antibodies in the plasma. Due to the presence of both the antigens, AB blood group person cannot donate blood to anyone. However, the person can receive blood from any blood group as it has no antibodies. Thus, AB blood group is a universal recipient.

Answer: (b)

Answer: (a)

Ventricle is one of two large chambers in the heart that collect and expel blood received from an atrium towards the peripheral beds within the body and lungs. Ventricles are far more thick walled than atria and left ventricle is at least three times thicker than the right one.

Answer: (b)

A two-chambered heart with the vena cava entering the auricle and the aorta leaving the ventricle would totally by pass the pulmonary circuit. As a result, the blood would never reach the lungs and would never pick up a fresh supply of oxygen to take to the cells.

Answer: (b)

Answer: (d)

Answer: (a)

The contraction starts shortly after the Q wave and marks the beginning of the systole.

Answer: (c)

Breakdown products of haemoglobin are haem & Globin protein which is then converted into yellowish substance bilirubin which is extracted by the liver cells from the blood & stored in the form of bile in gall bladder.

Answer: (c)

Answer: (c)

Answer: (a)

Individuals with AB blood group have both antigen A and B on their RBCs, and no antibodies for either of the antigen in their plasma. Type O individuals are without A and B antigens on their RBCs, but have antibodies for both these antigens in their plasma. Individuals with blood group AB can receive blood of A, B or O group, while those with blood group O can donate blood to anyone.

Answer: (a)