Biology Class 11th Chapter 18 mcqs

1. In developing embryo RBCs are formed in

(a) Lymph node

(b) Bone marrow

(c) Liver

(d) Spleen

Answer: (c) Liver

2. 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

Answer: (a) Pressure difference between the post caval and atrium

3. When body tissues are injured resulting in the loss of blood, the process of blood clot begins and the blood platelets release

(a) Fibrinogen

(b) Thrombin

(c) Prothrombin

(d) Thromboplastin

Answer: (d) Thromboplastin

4. An adult human has systolic and diastolic pressures as:

(a) 80 mm Hg and 120 mm Hg

(b) 120 mm Hg and 80 mm Hg

(c) 50 mm Hg and 80 mm Hg

(d) 80 mm Hg and 80 mm Hg

Answer: (b) 120 mm Hg and 80 mm Hg

5. Duration of cardiac cycle is

(a) 0.7 sec

(b) 0.9 sec

(c) 0.8 sec

(d) 0.11 sec

Answer: (c) 0.8 sec

6. Oxygenated blood occurs in

(a) Pulmonary artery

(b) Right atrium

(c) Right ventricle

(d) Pulmonary vein

Answer: (d) Pulmonary vein

7. The cells lining the blood vessels belong to the category of

(a) Columnar epithelium

(b) Connective tissue

(c) Smooth muscle tissue

(d) Squamous epithelium

Answer: (d) Squamous epithelium

8. Heart failure occurs due to

(a) heart stops beating

(b) damage of heart muscles

(c) congestion of lungs

(d) all of the above

Answer: (c) congestion of lungs

9. Artificial pace maker is transplanted in

(a) Inter auricular septum

(b) Below the collar bone

(c) Inter ventricular septum

(d) Right auricle

Answer: (b) Below the collar bone

10. Which of the following statement/statements can be related to erythroblastosis foetalis?

(a) Severe anemia and jaundice to the baby.

(b) Can be avoided by giving anti-Rh antibodies to mother immediately after delivery of the first child.

(c) Rh-antibodies from the Rh -ve mother destroys foetal RBCs.

(d) All of the above

Answer: (d) All of the above

11. Among the following stem cells, which are found in the umbilical cord?

(a) Cord blood stem cells

(b) Adult stem cells

(c) Embryonic stem cells

(d) All of the above

Answer: (a) Cord blood stem cells

12. If vagus nerve is cut the heart beat

(a) increases

(b) decreases

(c) will not be affected

(d) will stop immediately

Answer: (a) increases

13. 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

Answer: (a) The flow of blood into the pulmonary artery will be reduced

14. Heparin is

(a) Anti-allergic

(b) Blood diluter

(c) Anticoagulant

(d) Antiseptic

Answer: (c) Anticoagulant

15. An adult human has systolic and diastolic pressures as:

(a) 80 mm Hg and 120 mm Hg

(b) 120 mm Hg and 80 mm Hg

(c) 50 mm Hg and 80 mm Hg

(d) 80 mm Hg and 80 mm Hg

Answer: (b) 120 mm Hg and 80 mm Hg

16. Cardiac arrest is the state when

(a) heart stops beating

(b) inadequate blood supply to the heart

(c) heart not pumping enough to meet the body needs

(d) blood pressure increases

Answer: (a) heart stops beating

17. What is the normal blood pressure of human beings?

(a) 110/70

(b) 120/70

(c) 120/80

(d) 110/80

Answer: (c) 120/80

18. Arteries are best defined as the vessels which

(a) Carry blood from one visceral organ to another visceral organ

(b) Supply oxygenated blood to the different organs

(c) Carry blood away from the heart to different organs

(d) Break up into capillaries which reunite to form a vein

Answer: (c) Carry blood away from the heart to different organs

19. Christmas disease is also known as

(a) Haemophilia B

(b) AIDS

(c) Haemophilia A

(d) Haemolytic jaundice

Answer: (a) Haemophilia B