Test: Body Fluids & Circulation - 2 - NEET MCQ

Let's analyze the statements about blood plasma proteins:

Statement i: "Decrease in their level causes excessive absorption of water from tissues into blood."

• This statement is incorrect. A decrease in the level of blood plasma proteins would actually result in a decrease in osmotic pressure, leading to less water being drawn from tissues into the blood. Instead, it would cause water to accumulate in the tissues, leading to edema.

Statement ii: "They maintain osmotic pressure."

• This statement is correct. Blood plasma proteins, especially albumin, play a crucial role in maintaining the osmotic pressure of the blood.

Therefore, the correct option is:

      3. Statement i) is wrong and ii) is correct.

The mass of tissue seen in the lower left corner of the right atrium close to the atrio-ventricular septum called the atrio-ventricular node (AVN).

Antherosclerosis leads to high blood pressure, haemorrhage causes hypotension, heparin is used as anticoagulant and polycythemia causes abnormal increase in RBC count.

AB blood group does not have any antibodies in plasma. That's why AB blood group is a universal recipient.

A symptom of acute chest pain appears when no enough oxygen is reaching the heart muscle.

Fats are absorbed through lymph in the lacteals present in the intestinal villi.

Blood pressure is represented as the ratio of systolic over diastolic pressure. The difference between systolic and diastolic pressure is called pulse pressure. The value of normal healthy pulse pressure is 40 mm Hg.

In case of chronic CAD, the lumen of coronary artery may get nearly completely obstructed that results into restricted flow of blood to heart. The tissue receives inadequate bloods called myocardial ischemia.

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.

The first heart sound (lub) is associated with the closure of the tricuspid and bicuspid valves whereas the second heart sound (dub) is associated with the closure of the semilunar valves.

In case of allergic asthma, leucocyte count of blood test shows abnormal increase in the number of Eosinophils

• The vascular system or the human circulatory system consists of the heart, the blood vessels-the arteries, the veins and the capillaries, and the specialized fluid connective tissue, blood.
• The lungs are a part of the respiratory system.

4 min = 240 sec. Therefore, 240/0.8 = 300 cardiac cycles.

• The muscular heart is located in the thoracic cavity of the body.
• It is located on the ventral side of the body.
• The stomach, the kidneys and the ovaries are located below the heart and the lungs.

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

• The SAN or the sinoatrial node is located in the upper right corner of the right atrium.
• It has the ability to generate 70-75 action potentials per minute.
• It is hence known as the pacemaker of the heart.

• The AVN or the atrio-ventricular node is located in the lower left corner of the right atrium.
• It is situated close to the atrio-ventricular septum which separates the atria and the ventricles.

Since Ramesh has both Anti-A and Anti-B antibodies and the Rh antigen, he has the O positive blood group. Therefore, he can receive blood from individuals with O positive or O negative blood groups. This is because O negative blood lacks A and B antigens and is compatible due to the absence of Rh factor, making option b  correct.

RBCs have an average life span of 120 days after which they are destroyed in the spleen (graveyard of RBCs).
It is a clot or coagulam formed mainly of a network of threads called fibrins in which dead and damaged formed elements of blood are trapped.
Fibrins are formed by the conversion of inactive fibrinogens in the plasma by the enzyme thrombin.

The T-wave in an ECG represents the repolarisation of the ventricles, marking the return of the ventricles from an excited state to a normal state. This phase marks the end of systole. Therefore, Option C is correct.