Assertion: WBCs accumulate at the site of wounds by diapedesis.
Reason: It is the sqeezing of leucocytes from the endothelium.
[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false
Given below are four statements (1-4) regarding human blood circulatory system
(A) Arteries are thick-walled and have narrow lumen as compared to veins
(B) Angina is acute chest pain when the blood circulation to the brain is reduced
(C) Persons with blood group AB can donate blood to any person with any blood group ABO system
(D) Calcium ions play a very important role in blood clotting
Which two of the above statements are correct?
[A] (a) & (d)
[B] (a) & (b)
[C] (b) & ©
[D] (c) & (d)
The haemoglobin content per 100 ml of blood of a normal healthy human adult is:
[A] 5 – 11 mg
[B] 25 – 30 mg
[C] 17-20 rag
If due to some injury the chordate 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 aorta will be slowed down
[B] The ‘pacemaker’ will stop working
[C] The blood will tend to flow back into the left atrium
[D] The flow of blood into the pulmonary artery will be reduced
Arteries are best defined as the vessels which:
[A] Carry blood away from the heart to different organs
[B] Break up into capillaries which reunite to form a vein
[C] Carry blood from one visceral organ to another visceral organ
[D] Supply oxygenated blood to the different organs
Which one of the following statements is correct regarding blood pressure?
[A] 100/55 mmHg is considered an ideal blood pressure
[B] 105/50 mmHg makes one very active
[C] 190/110 mmHg may harm vital organs like brain and kidney
[D] 130/90 mmHg is considered high and require treatment
A person with unknown blood group under ABO system has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend, who has a valid certificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?
[A] Type AB
[B] Type O
[C] Type A
[D] Type B
‘Bundle of His’ is a part of which one of the following organs in humans?
Which one of the following plasma proteins is involved in the coagulation of blood?
[A] Serum amylase
[B] A globulin
[D] An albumin
A certain road accident with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?
[A] Blood group B
[B] Blood group AB
[C] Blood group O
[D] Blood group A
Person with blood group AB is considered as universal recipient because he has:
[A] Both A and B antigens on RBC but no antibodies in the plasma
[B] Both A and B antibodies in the plasma
[C] No antigen on RBC and no antibody in the plasma
[D] Both A and B antigens in the plasma but no antibodies
How do parasympathetic neural signals affect the working of the heart?
[A] Reduce both heart rate and cardiac output
[B] Heart rate is increased without affecting the cardiac output
[C] Both heart rate and cardiac output increase
[D] Heart rate decreases but cardiac output increases
Erythropoiesis starts in:
[D] Red bone marrow
Blood pressure in the mammalian aorta is maximum during:
[A] Systole of the left atrium
[B] Diastole of the right ventricle
[C] Systole of the left ventricle
[D] Diastole of the right atrium
Which one of the following is correct?
[A] Plasma = Blood – Lymphocytes
[B] Serum = Blood + Fibrinogen
[C] Lymph = Plasma + RBC + WBC
[D] Blood = Plasma + RBC + WBC + Platelets
Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when:
[A] Ventricular walls vibrate due to gushing in of blood from atria
[B] Semi lunar valves close down after the blood flows into vessels from ventricles
[C] AV node receives signal from SA node
[D] AV valves open up
Which one of the following animals has two separate circulatory pathways?