Wednesday, November 11, 2020

Body Fluids and Circulation | Class 11 | Previous Years Questions and Answers (2015 to 2020)

BODY FLUIDS AND CIRCULATION


2020 MARCH


1.    Observe the Diagram. (Score 3)



(a)    What does it denote?

(b)    What do P, QRS, T represent?

(c)    What is its clinical significance?


✔️Answer:


(a) Electrocardiogram (ECG).

(b) P wave: Depolarization of atria.

 QRS wave: Depolarization of ventricles.

 T-wave: Repolarization of ventricles.

(c) It is used to find out the deviation or abnormality of functioning of heart.


2019 JULY


1.   (a) Make a flowchart showing cardiac impulse conduction using appropriate terms given in bracket. (Score 2)

[SAN, Right atrium, AVN, AV Bundle, Bundle of His, Ventricle]

(b) Which part known as pacemaker?


✔️Answer:


(a)  SAN → Right atrium → AVN → AV Bundle → Bundle of His → Ventricle.

(b) SA node (SAN)


2.  Blood coagulation, is a mechanism to prevent the excessive loss of blood. (Score 3)


    (a) Identify the enzyme help the conversion of inactive fibrinogen.
    (b) Mention the role of thrombokinase.
    (c) Which ion is necessary for blood clotting?

✔️Answer:


(a) Thrombin

(b) Activates prothrombin to thrombin.

(c) Calcium ions.


2019 MARCH


1.  Diagrammatic representation of a standard ECG is given below. (Score 3)



    (a) Expand ECG.
    (b) What does ‘P’,’T’ waves denote?
    (c) Mention the clinical significance of ECG?

✔️Answer:


(a) Electrocardiogram.

(b) P wave: Depolarization of atria.

T-wave: Repolarization of ventricles.

(c) It is used to find out the deviation or abnormality of functioning of heart.


2.   a) Person with 'AB' blood group is called 'universal recipient'. Give a reason"
b) List out any two disorders of human circulatory system. (Score 2)


✔️Answer:


a) AB blood group has no antibodies. So AB group persons can receive blood from other groups.

b) Hypertension, Coronary artery disease.


2019 MODEL


1.  Copy the table and fill in the gap with appropriate words. (Score 3)


Blood cell

Type of cell

Classification

Function

...?...

Granulocyte

...?...

Phagocytosis

Basophil

...?...

...?...

Lymphocyte

...?...

Monocyte

...?...

 

✔️Answer:


Blood cell

Type of cell

Classification

Function

WBC

Granulocyte

Neutrophil

Phagocytosis

Basophil

Inflammatory reactions

Agranulocytes

Lymphocyte

Immune response

Monocyte

Phagocytosis

 

2.        


    (a) Name the above two diagram A and B.
    (b) Write one example for each in which they belong.
    (c) The blood-filled cavity of cockroach is known as ………… (Score 3)

✔️Answer:


(a) A= Open circulatory system.

            B= Closed circulatory system.

(b) Open circulatory system. E.g. Cockroach.

      Closed circulatory system. E.g. Earthworm.

(c) Haemocoel.


2018 AUGUST


1.   Plasma without clotting factor is called …… (Score 1)


✔️Answer: Serum


2.   Classify the following terms under two suitable headings. (Score 2)

Neutrophil, Monocyte, Eosinophil, Lymphocyte


✔️Answer:


Granulocytes: Neutrophil, Eosinophil.

Agranulocytes: Monocyte, Lymphocyte.


2018 MARCH


1.   Diagrammatic representation of a standard ECG is given below: (Score 2)



a) What does the QRS complex denotes?
b) Mention the clinic al significance of ECG.


✔️Answer:


(a) Depolarization of ventricles.

(b) It is used to find out the deviation or abnormality of functioning of heart.


2.   Match the terms in column A with those in columns B and C. (Score 3)


A

B

C

a) Neutrophils

2 – 3%

Immune response

b) Eosinophils

20 – 25%

Phagocytic

c) Lymphocytes

60 – 65%

Allergic reaction


✔️Answer:


A

B

C

a) Neutrophils

60 – 65%

Phagocytic

b) Eosinophils

2 – 3%

Allergic reaction

c) Lymphocytes

20 – 25%

Immune response

 

2018 MODEL


1.  Fill in the blanks suitably. (Score 3)




✔️Answer:


(a) Granulocytes

(b) Basophils

(c) Monocytes

(d) Lymphocytes

(e) Resist infections

(f) Immune responses


2017 MARCH


1.   a)   Select the correct statement regarding with ECG of man. (Score 1)

i)     P-wave represents auricular repolarization

ii)    P-wave represents ventricular repolarization

iii)   P-wave represents auricular depolarization

iv)   P-wave represents ventricular depolarization

b)   Observe the diagram and label A, B, C & D. (Score 2)



✔️Answer:


(a) (iii) P-wave represents auricular depolarization

(b) A= Aorta, B= Superior vena cava.

      C= Pulmonary artery, D= Chordae tendinae.


2016 MARCH


1.   Longitudinal section of the human heart showing internal structure is given below. Observe the diagram and answer the following questions: (Score 3)

a)  Label the parts marked as A, B, C.

b)  Draw a flowchart to show double circulation.


✔️Answer:


(a) A= Aorta, B= Semilunar valve, C= Left ventricle

(b)

OR


“Sinoatrial Node is called pace maker of our heart.”

a)  Justify the statement.

b)  Define cardiac cycle and cardiac output.


✔️Answer:


(a) SAN initiates and maintains contraction of heart by generating action potentials. So, it is called the pacemaker.


(b) Cardiac cycle: It is the cyclic contraction and relaxation of heart for pumping blood.

   Cardiac output: It is the volume of blood pumped out by each ventricle per minute.


SEPTEMBER 2015 (IMPROVEMENT)


1.   Make a diagrammatic sketch of human double circulation. Label three associated organs and any one blood vessel. (Score 3)


✔️Answer:


OR


Name the two types of heart valves and mention their functions. (Score 3)


✔️Answer:


Tricuspid valve and bicuspid (mitral) valve:  They allow the flow of blood only in one direction, i.e. from atria to ventricles.

Semi-lunar valves: Present at the opening of pulmonary artery and aorta. They prevent backward flow of blood.


2015 MARCH


1.   Find the odd one and write the function. (Score 1)


Neutrophil, Erythrocyte, Monocyte, Lymphocyte, Basophil, Eosinophil

✔️Answer:


Erythrocyte: Function is the transport of oxygen and CO2.


2.   Observe the flowchart and answer questions given below.



a.  Draw the flow chart correctly.

b.  What will happen if the SA node is not working properly? (Score 2)


✔️Answer:


(a)

    
    (b) Contraction and functioning of heart will be stopped.

2010 to 2014 >>


Online Unit Test >>

No comments:

Post a Comment