Breathing and exchange of gases neet questions

This is an important section to pay attention from the unit Human physiology as every year questions are asked from this chapter. Let's begin with the brief introduction of Respiration. Every living organism needs to obtain energy from the organic food either prepared by it autotrophic organisms or consumed by it heterotrophic organisms.

The process of oxidizing food to obtain energy by using oxygen and releasing carbon dioxide is called the respiration. It is a physicochemical process that includes the following:. The human respiratory system is the track that allows the air to move in from the nose to the lungs and also expel it in the same way.

There are the following organs in the human respiratory system:. Breathing process is a sum of inhalation of air from outside to the lungs and exhalation of the air from the lungs to the inside.

These occur in the following manner:. The partial pressure of oxygen pO 2 is more in alveoli than in blood, so it diffuses in the blood while pCO 2 is more in blood than in alveoli, so it diffuses out of blood.

In tissues, the pCO 2 is more due to respiration, so CO 2 moves in the blood and O 2 moves in the tissues because pO 2 is low in tissues. Rest is transported as dissolved in plasma. It is affected by the pH and partial pressure of the oxygen. Medical Exams. NEET Breathing and Exchange of Gases Notes Introduction Every living organism needs to obtain energy from the organic food either prepared by it autotrophic organisms or consumed by it heterotrophic organisms.

It is a physicochemical process that includes the following: Breathing : It is the physical intake of oxygen through the process of inhalation and giving out of carbon dioxide through the process of exhalation. Cellular respiration : It is the chemical process of using inhaled oxygen to oxidize the food and release carbon dioxide.

Respiratory organs There are the following categories of organs involved in respiration: Conducting parts : They clean, humidify and transport the air to the inside of the body. Exchanging parts : These allow the exchange of oxygen and carbon dioxide between the blood and air.

Human Respiratory System The human respiratory system is the track that allows the air to move in from the nose to the lungs and also expel it in the same way.

There are the following organs in the human respiratory system: S. Upper respiratory tract Lower respiratory tract 1. Nostrils Trachea 2 Nasal cavity Lungs 3. Pharynx Bronchi 4. Epiglottis Bronchioles 5. Larynx Alveoli Upper Respiratory Tract : Nostrils : These are the openings through which the air enters and leaves the respiratory system. Nasal cavity : The nostrils lead to the nasal cavity which has hair cells and mucus.

The air is cleaned, moistened and warmed and allowed to move further in the respiratory tract. Pharynx : It is a space that begins from the superior of the uvula and continues till the hyoid bone.All mock online tests at Studiestoday.

Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education.

Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning. Because of the prevailing condition of spread of COVID pandemic in the country, special efforts are required for conducting examinations in a safe manner. As a number of students have shifted from the district of their school to some other district in the country, It is clear that this pandemic has utterly disrupted an education system that many assert was already losing its relevance.

Enhancing professional development digitally is a need in the times of COVID, where social distancing and remote interactions is the new CBSE board has issued the following clarification relating to various news reports regarding reduction in syllabus and questions from the reduced syllabus during board exams.

Please read below: It has come to notice of the Board through a section of media reports that These people have been contacting parents and have been telling them that they have access to student marks data for Board Read More.

Previous Pause Next. CBSE Online Training for Teachers It is clear that this pandemic has utterly disrupted an education system that many assert was already losing its relevance.

CBSE Reduced Syllabus Clarification CBSE board has issued the following clarification relating to various news reports regarding reduction in syllabus and questions from the reduced syllabus during board exams. Search keywords Search.Which of the following chemical reactions can occur anaerobically?

breathing and exchange of gases neet questions

Match the following columns. Expiratory muscles contract at the time of a deep inspiration b normal inspiration and expiration c forceful expiration d normal expiration. Respiration involves one of the following sets of processes a inspiration, exchange of gases and expiration b aspiration, inspiration and expiration c external, internal and expiration d None of the above.

During inspiration, air passes into lungs due to a increase in volume of thoracic cavity and fall in lung pressure b fall in pressure inside the lungs c increased volume of thoracic cavity d muscular expansion of lungs. In mammals, ventilation movements of lungs are governed by a muscular wall of lungs b intercostal muscles c diaphragm d diaphragm and intercostal muscles.

The maximum amount of air that can be expired after a maximum inspiration is called the a forced expiratory volume b maximum expiratory flow c tidal volume d vital capacity. If the thoracic wall but not lungs, is punctured the a lungs get inflated b man dies as the lungs get collapsed c breathing rate decreases d breathing rate increases.

In human beings, rib case and sternum move upwardly and outwardly during a exercise b sudden back injury c expiration d inspiration. Mark the correct pair of muscles involved in the normal breathing in humans.

Given diagram represents the human larynx. Choose the correct combination of labelling from the options given below. Neither the trachea nor the bronchi contain a hyaline cartilage b ciliated columnar epithelium c goblet cells d simple squamous epithelium. Pharyngeal tonsils are located in the a nasopharynx b oral cavity c nasal cavity d oropharynx. Which of the following is not a structural feature of the left lung?

Volume of air left after maximum forceful expiration in human lung is a total lung capacity b residual volume c vital capacity d tidal volume. One of the following is a difference between pulmonary respiration of frog and human a diaphragm and ribs play role in respiration b lungs are respiratory organs c respiration occurs due to pressure gradient d None of the above.

A person met with an accident and died instantly without any injury to heart, brain, stomach and kidney. One of the following is a reason for his death a intestine got twisted b RBCs became coagulated.

The serous membrane in contact with the lung is the a parietal pleura b pulmonary mesentery c pulmonary peritoneum d visceral pleura. Which is not a structure of the respiratory system? The roof of the nasal cavity is formed primarily by the a hard palate b cribriform palate of the ethmoid bone c superior concha d vomer.

Arrange the following in the order of increasing volume I. Tidal volume II. Residual volume III. Expiratory reserve volume IV. Tidal volume in human beings is a mL b mL c mL d 4. Residual volume in the lungs of an average human being is a mL b The amount of air that is moved in and out of the lungs during quiet normal breathing is called the a vital capacity b tidal volume c residual volume d vital volume.

Identify the correct and incorrect match about respiratory volume and capacities and mark the correct answer. Expiration involves a relaxation of diaphragm and intercostal muscles b Contraction of diaphragm and intercostal muscles c contraction of diaphragm muscles d contraction of intercostal muscles. Which combination of muscles contraction causesinspiration? Which one of the following statement is incorrect? Residual air can be traced in a alveoli b bronchi c nasal chambers d trachea.

Anatomical dead space is a upper respiratory tract b space between alveoli and capillaries c lower respiratory tract d in nasal sacs. Partial pressure of oxygen in the inspired and expired air is respectively a and mm Hg b and 40 mm Hg c and 95 mm Hg d 40 and 95 mm Hg. In human beings, partial pressure of carbon dioxide in the inspired and expired air is respectively a 0.

The primary role of oxygen in the body is to a help to build amino acids b allow glycolysis within the mitochondria of the cell c accept electrons in the electron transport chain d facilitate lipolysis within adipose cells. Oxygen dissociation curve of myoglobin is a hypobolic b hyperbolic c linear d sigmoid.Practice the multiple choice questions to test understanding of important topics in the chapters. Download latest questions with answers for Biology Breathing and Exchange of Gases in pdf free or read online in online reader free.

Students should practice the multiple choice questions to gain more marks in NEET exams. Download in pdf free by clicking on links below.

The study material for Biology Breathing and Exchange of Gases has been made by experienced teachers of leading institutes in India is available for free download.

Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning.

These people have been contacting parents and have been telling them that they have access to student marks data for Board CBSE board has issued the following clarification relating to various news reports regarding reduction in syllabus and questions from the reduced syllabus during board exams. Please read below: It has come to notice of the Board through a section of media reports that The prevailing health emergency in the country and at different parts of the world as well as the efforts to contain the spread of Covid pandemic has resulted in loss of class room teaching due to closure of schools.

Previous Pause Next. Notes Free revision notes, brief chapter explanations, chapter summary and mind maps for all important and difficult topics of NEET Biology Breathing and Exchange of Useful Resources Free download latest Useful Resources like important concepts, sure shot questions, guess papers, exam notes and other study material for NEET Breathing and Read More. CBSE Reduced Syllabus Clarification CBSE board has issued the following clarification relating to various news reports regarding reduction in syllabus and questions from the reduced syllabus during board exams.

CBSE Reduced Syllabus Class 9 and 10 The prevailing health emergency in the country and at different parts of the world as well as the efforts to contain the spread of Covid pandemic has resulted in loss of class room teaching due to closure of schools. Classes Class XII. Search keywords Search.A Aristole? B Syrinx done clear. C Adam's apple done clear. D Muller's organ done clear.

A Provide a large surface area. B Have ciliated epithelium.

Breathing and Exchange of Gases - Part 1 - Most Expected Questions - NEET 2020

C Are suited for diffusion of gases. D Have rich supply of blood vessels and lymph ducts. A 2 lobes done clear. B 4 lobes done clear. C 3 lobes done clear. D 5 lobes done clear. A We normally do not ventilate our lungs at a high enough rate. B The lungs have too many alveoli to ventilate. C There is "dead space" in the trachea and bronchi. D The trachea and bronchi are too small in volume.

A Chloride shift done clear. B Ionic shift done clear. C Atomic shift done clear. Suppose an emphysema victim with a tidal volume of 0. He found that less efficient fish tended to have:. A Greater ventilation done clear. B A thicker respiratory surface done clear. C More haemoglobin done clear.

NEET Biology : Breathing and Exchange of Gases

D A faster heart rate done clear. A Sucking inspired air in. B Perceiving sense of smell. C Pushing expired air out. D Pushing mucus out. A Remain same done clear. B Rise done clear. C Fall done clear. D First rise and then fall done clear. A46 done clear. B40 done clear.NEET students should download and practice these questions to get better marks in examinations.

breathing and exchange of gases neet questions

Chapter Breathing and Exchange of Gases. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education.

Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning. The prevailing health emergency in the country and at different parts of the world as well as the efforts to contain the spread of Covid pandemic has resulted in loss of class room teaching due to closure of schools.

NEET Biology Chapter Wise Mock Test – Breathing and Exchange of Gases

Procedure for correction in Name and Date of Birth in CBSE records Name Change: Applications regarding changes in name or surname of candidates will be considered provided the changes have been admitted by the Court of law and notified in the Government Gazette before To focus on the importance The reduced topics will not be part of the internal assessment or for the Keeping in view the requests received from various State Governments and the changed circumstances as on date, following has been decided- 1.

Assessment of the CBSE board has issued the following clarification relating to various news reports regarding reduction in syllabus and questions from the reduced syllabus during board exams.

Please read below: It has come to notice of the Board through a section of media reports that Download PDF. Previous Pause Next. Useful Resources Free download latest Useful Resources like important concepts, sure shot questions, guess papers, exam notes and other study material for NEET Biology as per CBSE Reduced Syllabus Class 9 and 10 The prevailing health emergency in the country and at different parts of the world as well as the efforts to contain the spread of Covid pandemic has resulted in loss of class room teaching due to closure of schools.

Read More. Procedure for correction in Name and Date of Birth Procedure for correction in Name and Date of Birth in CBSE records Name Change: Applications regarding changes in name or surname of candidates will be considered provided the changes have been admitted by the Court of law and notified in the Government Gazette before CBSE Reduced Syllabus Clarification CBSE board has issued the following clarification relating to various news reports regarding reduction in syllabus and questions from the reduced syllabus during board exams.

Breathing and Exchange of Gases NEET Biology Online Test

Classes Biology Chemistry Physics. Search keywords Search.What will be his expiratory capacity if the residual volume is mL? Expiratory capacity is the total volume of air a person can expire after normal inspiration It includes tidal volume and expiratory reserve volume.

Allergens cause bronchial asthma that stimulates release of histamine from mast cells Symptoms of bronchial asthma are coughing wheezing breathing noisilydifficulty in breathing due to inflammation of bronchi and bronchioles. Select the correct statement.

Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively? Asthma is a difficulty in breathing causing wheezing due to inflammation of bronchi and bronchioles. Emphysema is a chronic disorder in which abnormal distension of the bronchioles or alveolar sacs of the lungs occurs due to which respiratory surface is decreased for the exchange of oxygen and carbon dioxide. Match the items given in column I with those in column II and select the correct option given below.

Which of the following is an occupational respiratory disorder? Occupational respiratory disorders are due to the occupation of the individual. Silicosis is an occupational disease that occurs due to the excessive inhalation of silica dust by the workers of mining industry.

Long exposure can cause proliferation of fibrous connective tissue fibrosis of upper part of lungs causing inflammation. Anthrax and botulism are bacterial diseases of humans caused by Bacillus anthracis and Clostridium botulinum respectively.

Emphysema is an abnormal distension of the bronchioles or alveolar sacs of the lungs. Lungs are made up of air-filled sacs, the alveoli.

breathing and exchange of gases neet questions

Residual volume is the volume of air which remains in the lungs after the most forceful expiration. This residual air enables the lungs to continue exchange of gases even after maximum exhalation.

Due to this, lungs do not collapse even after forceful expiration. The partial pressure of oxygen in alveolar air is mmHg whereas it is 40 mmHg in deoxygenated blood and 95 mmHg in oxygenated blood. Intrapleural pressure is the pressure of air within the pleural cavity.

Breathing and Exchange of Gases NEET

Intrapleural pressure is always negative, which acts like a suction to keep the lungs inflated and prevent them from collapsing. The negative intrapleural pressure is due to three main factors: surface tension of the alveolar fluid; elasticity of lungs; elasticity of thoracic wall.

Normally, there is a difference between intrapleural and intrapulmonary pressure, which is called transpulmonary pressure. This transpulmonary pressure creates the suction to keep the lungs inflated.


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