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Body Fluids and Circulation Class 11 MCQs Questions with Answers
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. |
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