Solving the Body Fluids and Circulation Multiple Choice Questions of Class 11 Biology Chapter 18 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Body Fluids and Circulation Class 11 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 18 Biology Class 11 and cross-check your answers during preparation.

I. Select the correct answer from the following questions:

Question 1.
Heart is incompletely 4 chambered in
(a) Amphibian
(b) Birds
(c) Fishes
(d) Reptiles

Answer

Answer: (d) Reptiles

---

Question 2.
Blood will lose maximum O₂ while passing through
(a) Left atrium
(b) Arteries
(c) Tissue capillaries
(d) Alvelor capillaries

Answer

Answer: (c) Tissue capillaries

---

Question 3.
Ventricular systole is stimulated by
(a) S-A node
(b) A-V aperture
(c) A-V node
(d) A-V valve

Answer

Answer: (c) A-V node

---

Question 4.
Lymph lacks
(a) Erythrocytes
(b) Plasma proteins
(c) Platelets
(d) All of these

Answer

Answer: (d) All of these

---

Question 5.
The sound dupp in heart is produced by
(a) Closure of semilunar valves
(b) Closure of A-V valves
(c) Opening of A-V Valves
(d) Opening of semilunar valves

Answer

Answer: (a) Closure of semilunar valves

---

Question 6.
Heart beat initiates from
(a) Bundle of his
(b) Purkinje fibres
(c) Sinuauricular node
(d) Auriculoventricular node

Answer

Answer: (c) Sinuauricular node

---

Question 7.
Pulmonary vein carries
(a) Pure blood from heart
(b) Impure blood from lungs
(c) Pure blood from lungs
(d) Impure blood from heart

Answer

Answer: (c) Pure blood from lungs

---

Question 8.
Blood and lymph differ in
(a) Blood has cells while lymph is without cells
(b) Blood has RBCs which are absent in lymph
(c) Blood has several inorganic substances which are absent in lymph
(d) Blood has WBCs which are absent in lymph

Answer

Answer: (b) Blood has RBCs which are absent in lymph

---

Question 9.
Blood platelets are source of
(a) Calcium
(b) Fibrinogen
(c) Haemoglobin
(d) Thrombolastin

Answer

Answer: (d) Thromboplastin

---

Question 10.
Pacemaker of the heart is
(a) A-V node
(b) I-A septum
(c) S-A node
(d) A-V septum

Answer

Answer: (c) S-A node

---

Question 11.
Valves are found in veins to check the back flow of the blood, flowing under
(a) Low pressure
(b) High pressure
(c) Very high pressure
(d) No pressure

Answer

Answer: (a) Low pressure

---

Question 12.
The vessel carrying blood to Bowman’s capsule is
(a) Efferent arteriole
(b) Afferent arteriole
(c) Pulmonary vein
(d) Renal vein

Answer

Answer: (b) Afferent arteriole

---

Question 13.
Thrombin occurs in vertebrates in
(a) Blood and important for clotting
(b) Liver and initiates secretion
(c) Stomach and digests proteins
(d) Blood and imparts red colour

Answer

Answer: (a) Blood and important for clotting

---

Question 14.
The blood pressure is measured by the instrument
(a) Stethoscope
(b) Echocariograph
(c) Sphymomanometer
(d) Electrocardiograph

Answer

Answer: (c) Sphymonanometer

---

Question 15.
Which of the following carries oxygenated blood from the lungs to the heart
(a) Pulmonary veins
(b) Renal vein
(c) Hepatic vein
(d) Jugular vein

Answer

Answer: (a) Pulmonary veins

---

Question 16.
A pacemaker is meant for
(a) Transplanting heart
(b) Transplanting liver
(c) Regulation of blood flow
(d) Initiation of heart beats

Answer

Answer: (d) Initiation of heart beats

---

Question 17.
In which animal haemoglobin is dissolved
(a) Earthworm
(b) Frog
(c) Cockroach
(d) Rabbit

Answer

Answer: (a) Earthworm

---

Question 18.
Blood circulation was first discovered by
(a) His
(b) Darwin
(c) Lansteiner
(d) Harvey

Answer

Answer: (d) Harvey

---

Question 19.
Average heart beat/pulse rate in adult human being is
(a) 80/ minute
(b) 72/minute
(c) 100/minute
(d) 60/minute

Answer

Answer: (b) 72/minute

---

Question 20.
Normal blood pressure in an adult human beings is
(a) 200/110
(b) 120/80
(c) 100/60
(d) 150/100

Answer

Answer: (b) 120/80

---

II. Fill in the blanks:

Question 1.
…………. is the most commonly used body fluid by most of the higher organisms including ………… for this purpose.

Answer

Answer: Blood, humans

---

Question 2.
Another body fluid, …………. also helps in the transport of certain substances.

Answer

Answer: lumph

---

Question 3.
Blood is a special connective tissue consisting of a fluid matrix, …………. and formed elements.

Answer

Answer: plasma

---

Question 4.
…………., …………. and …………. are the major proteins.

Answer

Answer: Fibrinogen, globulins, albumins

---

Question 5.
Plasma is a ………… coloured, viscous fluid constituting nearly …………. percent of the blood.

Answer

Answer: straw, 55

---

Question 6.
Plasma also contains small amount of minerals like ……………….. etc.

Answer

Answer: Ca⁺⁺, Mg⁺⁺, HCO₃^– Cl^–

---

Question 7.
RBCs are formed in the …………… in the adults.

Answer

Answer: red bone marrow

---

Question 8.
A healthy individual has ………….. gms of haemoglobin in every 100 ml of blood.

Answer

Answer: 12-16

---

Question 9.
………….. are also known as white blood cells.

Answer

Answer: Leucocytes

---

Question 10.
Both ………….. are responsible for immune responses of the body.

Answer

Answer: B and T lymphocytes

---

Question 11.
Platelets also called …………… are cell fragments produced from ……………. (special cells in the bone marrow).

Answer

Answer: thrombocytes, megakryocytes

---

Question 12.
The distribution of antigens and antibodies in the four groups of blood. ………….., ……….., ………. and …………. are given

Answer

Answer: A, B, AB, O

---

Question 13.
Such individuals are called ……………. and those in whom this antigen is absent are called ……………

Answer

Answer: Rh positive (Rh+ve), Rh negative (Rh-ve)

---

Question 14.
A specialised cardiac musculature called the ……………. is also distributed in the heart.

Answer

Answer: nodal tissue

---

Question 15.
These branches give rise to minute fibres throughout the ventricular musculature of the respective sides and are called ……………

Answer

Answer: purkinje fibres

---

III. Mark the statements True (T) or False (F):

Question 1.
The SAN can generate maximum number of action potentials i.e., 70-75 per minute and is responsible for initiating and maintaining the rhythmic contractile activity of the heart. Therefore, it is called the pacemaker.

Answer

Answer: True

---

Question 2.
Ventricular systole increases the ventricular pressure causing the closure of tricuspid and bicuspid valves due to attempted backflow of blood into the atria.

Answer

Answer: True

---

Question 3.
Our heart normally beats 50-60 times in a minute.

Answer

Answer: False

---

Question 4.
During a cardiac cycle, each ventricle pumps out approximately 70 ml of blood which is called the stroke volume

Answer

Answer: True

---

Question 5.
The cardiac output of an athlete will be much higher than that of an ordinary man

Answer

Answer: True

---

Question 6.
During each cardiac cycle two prominent sounds are produced which can be easily heard through a stethoscope

Answer

Answer: True

---

Question 7.
ECG is a graphical representation of the electrical activity of the heart during a cardiac cycle

Answer

Answer: True

---

Question 8.
To obtain a standard ECG, a patient is connected to the machine with three electrical leads (one to each wrist and to the left ankle) that continuosly monitor the heart activity

Answer

Answer: True.

---

Question 9.
The T-wave represents the electrical excitation (or depolarisation) of the atria, which leads to the contraction of both the atria.

Answer

Answer: False

---

Question 10.
The P-wave represents the return of the ventricles from excited to normal state (repolarisation).

Answer

Answer: False

---

Question 11.
A special coronary system of blood vessels is present in our body exclusively for the circulation of blood to and from the cardiac musculature.

Answer

Answer: True

---

Question 12.
Adrenal medullary 7 hormones can also increase the cardiac output.

Answer

Answer: True

---

Question 13.
Hypertension is the term for blood pressure that is higher than normal (120/80). High blood pressure leads to heart diseases and also affects vital organs like brain and kidney.

Answer

Answer: True

---

Question 14.
Coronary Artery Disease, often referred to as atherosclerosis, affects the vessels that supply blood to the heart muscle.

Answer

Answer: True

---

Question 15.
Heart failure means the state of heart which is not pumping blood effectively enough to meet the needs of the body.

Answer

Answer: True

---

IV. Match the items of Column I with the items of Column II Column

Column I	Column II
(a) Angina pectoris	1. Systolic
(b) 120 mm Hg (milimetres of mercury pressure)	2. Diastolic
(c) 80 mm Hg (milimetres of mercury pressure)	3. myogenic
(d) Heart is called	4. A symptom of acute chest pain appears when enough oxygen is not reaching the heart muscle.
(e) Plasme is a	5. Water and proteins contribute 6-8 pecent of it.
(f) 90-92 percent of plasma is	6. against the Rh antigens
(g) Erythrocytes or	7. White blood cells (WBC)
(h) Leucocytes	8. Straw coloured
(i) Thrombocytes	9. called ‘Universal donors
(j) ‘O’ group individuals are	10. Red blood ceils (RBC)
(k) AB group	11. Called ‘Universal recipients
(l) An Rh-ve person if exposed to Rh+Ve blood will form specific antibodies	12. Platelets
(m) Lymph is a colourless fluid containing specialised lymphocytes	13. Which are responsible for the immune responses of the body.
(n) Annelids and chordates have a	14. Closed circulatory system.
(o) Rh antigens of the foetus do not get exposed to the Rh-ve blood of	15. the mother in the first pregnancy as the two bloods are well separated by the placenta.

Answer

Answer:

Column I	Column II
(a) Angina pectoris	4. A symptom of acute chest pain appears when enough oxygen is not reaching the heart muscle.
(b) 120 mm Hg (milimetres of mercury pressure)	1. Systolic
(c) 80 mm Hg (milimetres of mercury pressure)	2. Diastolic
(d) Heart is called	3. myogenic
(e) Plasme is a	8. Straw coloured
(f) 90-92 percent of plasma is	5. Water and proteins contribute 6-8 pecent of it.
(g) Erythrocytes or	10. Red blood ceils (RBC)
(h) Leucocytes	7. White blood cells (WBC)
(i) Thrombocytes	12. Platelets
(j) ‘O’ group individuals are	9. called ‘Universal donors
(k) AB group	11. Called ‘Universal recipients
(l) An Rh-ve person if exposed to Rh+Ve blood will form specific antibodies	6. against the Rh antigens
(m) Lymph is a colourless fluid containing specialised lymphocytes	13. Which are responsible for the immune responses of the body.
(n) Annelids and chordates have a	14. Closed circulatory system.
(o) Rh antigens of the foetus do not get exposed to the Rh-ve blood of	15. the mother in the first pregnancy as the two bloods are well separated by the placenta.

---