11th Zoology - Book Back Answers - Unit 7 - English Medium Guides

 

 

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Tamil Nadu Board 11th Standard Zoology - Unit 7: Book Back Answers and Solutions

    This post covers the book back answers and solutions for Unit 7 – Zoology from the Tamil Nadu State Board 11th Standard Zoology textbook. These detailed answers have been carefully prepared by our expert teachers at KalviTips.com.

    We have explained each answer in a simple, easy-to-understand format, highlighting important points step by step under the relevant subtopics. Students are advised to read and memorize these subtopics thoroughly. Once you understand the main concepts, you’ll be able to connect other related points with real-life examples and confidently present them in your tests and exams.

    By going through this material, you’ll gain a strong understanding of Zoology  Unit 7 along with the corresponding book back questions and answers (PDF format).

Question Types Covered:

• 1 Mark Questions: Choose the correct answer, Fill in the blanks, Identify the correct statement, Match the following 
• 2 Mark Questions: Answer briefly 
• 3, 4, and 5 Mark Questions: Answer in detail

All answers are presented in a clear and student-friendly manner, focusing on key points to help you score full marks.

All the best, Class 11 students! Prepare well and aim for top scores. Thank you!

Unit 7: Body Fluids And Circluation

I. Multiple Choice Questions

1. What is the function of lymph?
a. Transport of O2 into brain
b. Transport of CO2 into lungs
c. Bring interstitial fluid in blood
d. Bring RBC and WBC in lymph node
Answer Key:
c. Bring interstitial fluid in blood

2. Which one of the following plas proteins is involved in the coagulati of blood?
a. Globulin
b. Fibrinogen
c. Albumin
d. Serum amylase
Answer Key:
b. Fibrinogen

3. Which of the following is not involved in blood clotting?
a. Fibrin
b. Calcium
c. Platelets
d. Bilirubin
Answer Key:
d. Bilirubin

4. Lymph is colourless because
a. WBC are absent
b. WBC are present
c. Haemoglobin is absent
d. RBC are absent
Answer Key:
c. Haemoglobin is absent

5. Blood group is due to the presence or absence of surface
a. Antigens on the surface of WBC
b. Antibodies on the surface of RBC
c. Antigens on the surface of RBC
d. Antibodies on the surface of WBC
Answer Key:
c. Antigens on the surface of RBC

6. A person having both antigen A and antigen B on the surface of RBCs belongs to blood group
a. A
b. B
c. AB
d. O
Answer Key:
c. AB

7. Erythroblastosis foetalis is due to the destruction of
a. Foetal RBCs
b. Foetus suffers from atherosclerosis
c. Foetal WBCS
d. Foetus suffers from mianmata
Answer Key:
a. Foetal RBCs

8. Dub sound of heart is caused by
a. Closure of atrio-ventricular valves
b. Opening of semi-lunar valves
c. Closure of semi-lunar values
d. Opening of atrio-ventricular valves.
Answer Key:
c. Closure of semi-lunar values

9. Why is the velocity of blood flow the lowest in the capillaries?
a. The systemic capillaries are supplied by the left ventricle, which has a lower cardiac output than the right ventricle.
b. Capillaries are far from the heart, and blood flow slows as distance from the heart increases.
c. The total surface area of the capillaries is larger than the total surface area of the arterioles.
d. The capillary walls are not thin enough to allow oxygen to
Answer Key:
c. The total surface area of the capillaries is larger than the total surface area of the arterioles.

10. An unconscious patient is rushed into the emergency room and needs a fast blood transfusion. Because there is no time to check her medical history or determine her blood type, which type of blood should you as her doctor, give her?
a. A
b. AB
c. O+
d. O-
Answer Key:
c. O+

11. Which of these functions can be carried out by a matured red blood cell?
a. Protein synthesis
b. Cell division
c. Lipid synthesis
d. Active transport
Answer Key:
d. Active transport

12. At the venous end of the capillary bed, the osmotic pressure is
a. Greater than the hydrostatic pressure
b. Result in net outflow of fluids
c. Results in net absorption of fluids
d. No change occurs
Answer Key:
a. Greater than the hydrostatic pressure

13. A patient's chart reveals that he has a cardiac output of 7500mL per minute and a stroke volume of 50 mL. What is his pulse rate (in beats / min)
a. 50
b. 100
с. 150
d. 400
Answer Key:
с. 150

14. At any given time there is more blood in the venous system than that of the arterial system. Which of the following features of the veins allows this?
a. relative lack of smooth muscles
b. presence of valves
c. proximity of the veins to lymphatic's
d. thin endothelial lining
Answer Key:
b. presence of valves 

II. Short answer questions

a

III. Long answer questions

a

IV. Exercise

a