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Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board chapter 8 - Respiration and Circulation [Latest edition]

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Biology 12th Standard HSC for Maharashtra State Board - Shaalaa.com

Chapter 8: Respiration and Circulation

Exercise
Exercise [Pages 180 - 181]

Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board Chapter 8 Respiration and Circulation Exercise [Pages 180 - 181]

Exercise | Q 1.01 | Page 180

Choose the correct alternative.

The muscular structure that separates the thoracic and abdominal cavity is _______.

  • pleura

  • diaphragm

  • trachea

  • epithelium

Exercise | Q 1.02 | Page 180

Choose the correct alternative.

What is the minimum number of the plasma membrane that oxygen has to diffuse across to pass from air in the alveolus to haemoglobin inside a RBC?

  • Two

  • Three

  • Four

  • Five

Exercise | Q 1.03 | Page 180

Choose the correct alternative.

________ is a sound-producing organ.

  • Larynx

  • Pharynx

  • Tonsils

  • Trachea

Exercise | Q 1.04 | Page 180

Choose the correct alternative.

The maximum volume of gas that is inhaled during breathing in addition to T.V is _______.

  • residual volume

  • I.R.V.

  • G.R.V.

  • Vital capacity

Exercise | Q 1.05 | Page 180

Choose the correct alternative.

_______ muscles contract when the external intercostal muscles contract.

  • Internal abdominal

  • Jaw

  • Muscles in bronchial walls

  • Diaphragm

Exercise | Q 1.06 | Page 180

Choose the correct alternative.

Movement of cytoplasm in unicellular organisms is called __________.

  • diffusion

  • cyclosis

  • circulation

  • thrombosis

Exercise | Q 1.07 | Page 180

Choose the correct alternative.

Which of the following animals do not have closed circulation?

  • Earthworm

  • Rabbit

  • Butterfly

  • Shark

Exercise | Q 1.08 | Page 180

Choose the correct alternative.

Diapedesis can be seen in _________ cell.

  • RBC

  • WBC

  • Platelet

  • Neuron

Exercise | Q 1.09 | Page 180

Choose the correct alternative.

Pacemaker of heart is _________.

  • SA node

  • AV node

  • His bundle

  • Purkinje fibers

Exercise | Q 1.1 | Page 180

Choose the correct alternative.

Which of the following is without a nucleus?

  • Red blood corpuscle

  • Neutrophil

  • Basophil

  • Lymphocyte

Exercise | Q 1.11 | Page 180

Choose the correct alternative.

Cockroach shows which kind of circulatory system?

  • Open

  • Closed

  • Lymphatic

  • Double

Exercise | Q 1.12 | Page 180

Choose the correct alternative.

Diapedesis can be seen in _________ cell.

  • RBC

  • WBC

  • Platelet

  • Neuron

Exercise | Q 1.13 | Page 180

Choose the correct alternative.

Opening of inferior vena cava is guarded by _______.

  • bicuspid valve

  • tricuspid valve

  • Eustachian valve

  • Thebesian valve

Exercise | Q 1.14 | Page 180

Choose the correct alternative.

_______ wave in ECG represent atrial depolarization.

  • P

  • QRS complex

  • Q

  • T

Exercise | Q 1.15 | Page 180

Choose the correct alternative.

The fluid seen in the intercellular spaces in human is _________

  • blood

  • lymph

  • interstitial fluid

  • water

Exercise | Q 2 | Page 180

Match the Respiratory surface to the organism in which it is found.

Respiratory surface Organism
Plasma membrane Insect
Lungs Salamander
External gills Bird
Internal gills Amoeba
Trachea Fish
Exercise | Q 3.1 | Page 180

Very short answer question.

Why does trachea have ‘C’ shaped rings of cartilage?

Exercise | Q 3.2 | Page 180

Very short answer question.

Why is respiration in insect called direct respiration?

Exercise | Q 3.3 | Page 180

Very short answer question.

Why is a gas exchange very rapid at the alveolar level?

Exercise | Q 3.4 | Page 180

Very short answer question.

Name the organ which prevents the following the entry of food into the trachea while eating.

Exercise | Q 4.1 | Page 181

Short answer question.

Why is it advantageous to breathe through the nose than through the mouth?

Exercise | Q 4.2 | Page 181

Short answer question.

Identify the incorrect statement and correct it,

a. A respiratory surface area should have a large surface area.

b. A respiratory surface area should be kept dry.

c. A respiratory surface area should be thin, maybe 1mm or less.

Exercise | Q 4.3 | Page 181

Short answer question.

Given below is the characteristic of some modified respiratory movement. Identify them.

Spasmodic contraction of muscles of expiration and forceful expulsion of air through nose and mouth.

Exercise | Q 4.3 | Page 181

Short answer question.

Given below is the characteristic of some modified respiratory movement. Identify them.

An inspiration followed by many short convulsive expirations accompanied by facial expression.

Exercise | Q 4.4 | Page 181

Short answer question.

Write a note on blood plasma.

Exercise | Q 4.5 | Page 181

Short answer question.

Explain blood clotting in short.

Exercise | Q 4.6 | Page 181

Short answer question.

Describe pericardium.

Exercise | Q 4.7 | Page 181

Short answer question.

Describe valves of human heart.

Exercise | Q 4.8 | Page 181

Short answer question.

What is the role of papillary muscles and chordae tendinae in the human heart?

Exercise | Q 4.9 | Page 181

Short answer question.

Explain in brief the factors affecting blood pressure..

Exercise | Q 5.1 | Page 181

Give scientific reason.

Closed circulation is more efficient than open circulation.

Exercise | Q 5.2 | Page 181

Give scientific reason.

Human heart is called as myogenic and autorhythmic.

Exercise | Q 5.3 | Page 181

Give scientific reason.

Person who has undergone a heart transplant needs lifetime supply of immunosuppressants.

Exercise | Q 5.4 | Page 181

Give scientific reason.

Arteries are thicker than veins.

Exercise | Q 5.5 | Page 181

Give scientific reason.

Left ventricle is thick than all other chambers of heart.

Exercise | Q 6.1 | Page 181

Distinguish between open and closed circulation.

Exercise | Q 6.2 | Page 181

Distinguish between Arteries and Veins

Exercise | Q 6.3 | Page 181

Distinguish between Blood and lymph.

Exercise | Q 6.4 | Page 181

Distinguish between Blood capillary and lymph capillary

Exercise | Q 6.5 | Page 181

Distinguish between Intrinsic and extrinsic process of clotting

Exercise | Q 7.01 | Page 181

Long answer question:

Smita was working in a garage with the doors closed and automobiles engine running. After some time she felt breathless and fainted. What would be the reason? How can she be treated?

Exercise | Q 7.02 | Page 181

Long answer question:

Shreyas went to a garden on a wintry morning. When he came back, he found it difficult to breath and started wheezing. What could be the possible condition and how can he be treated?

Exercise | Q 7.03 | Page 181

Long answer question:

Why can you feel a pulse when you keep a finger on the wrist or neck but not when you keep them on a vein?

Exercise | Q 7.04 | Page 181

Long answer question:

A man’s pulse rate is 68 and cardiac output is 5500 cm3 . Find the stroke volume.

Exercise | Q 7.05 | Page 181

Long answer question:

Which blood vessel of the heart will have the maximum content of oxygen and why?

Exercise | Q 7.06 | Page 181

Long answer question:

If the duration of the atrial systole is 0.1 sec and that of complete diastole is 0.4 sec, then how does one cardiac cycle complete in 0.8 sec?

Exercise | Q 7.07 | Page 181

Long answer question:

How blood is kept moving in the large veins of the legs?

Exercise | Q 7.08 | Page 181

Long answer question:

Describe the histological structure of the artery, vein, and capillary.

Exercise | Q 7.09 | Page 181

Long answer question:

What is blood pressure? How is it measured? Explain the factors affecting blood pressure.

Exercise | Q 7.1 | Page 181

Long answer question:

Describe human blood and give its functions.

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Chapter 8: Respiration and Circulation

Exercise
Biology 12th Standard HSC for Maharashtra State Board - Shaalaa.com

Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board chapter 8 - Respiration and Circulation

Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board chapter 8 (Respiration and Circulation) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Maharashtra State Board Biology 12th Standard HSC for Maharashtra State Board solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Balbharati textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Biology 12th Standard HSC for Maharashtra State Board chapter 8 Respiration and Circulation are Organs of Respiratory Exchange, Respiratory System Or Tracheal System, Mechanism of Respiration, Regulation of Breathing, Modified Respiratory Movements, Common Disorders of Respiratory System, Transportation in Living Organisms, Circulation in Animals, Circulatory System in Human, Red Blood Corpuscles/Erythrocytes, White Blood Corpuscles/Leucocytes, Thrombocytes/Platelets, Heart, Working Mechanism of Human Heart, Blood Vessels, Blood Pressure (B. P.), Electrocardiogram, Lymphatic System.

Using Balbharati 12th Board Exam solutions Respiration and Circulation exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Balbharati Solutions are important questions that can be asked in the final exam. Maximum students of Maharashtra State Board 12th Board Exam prefer Balbharati Textbook Solutions to score more in exam.

Get the free view of chapter 8 Respiration and Circulation 12th Board Exam extra questions for Biology 12th Standard HSC for Maharashtra State Board and can use Shaalaa.com to keep it handy for your exam preparation

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