Breathing and Exchange of Gases Human Respiratory System
1.Which of the following is entirely made of cartilage?
a. Nasal septum
b. Larynx
c. Glottis
d. Trachea
2. Trachea divides into two a right and left primary bronchi at the level of:
a. Seventh cervical vertebra
b. Third thoracic vertebra
c. Fifth thoracic vertebra
d. Seventh thoracic vertebra
3. How many external nostrils are present in human beings
a. 1
b. 2
c. 3
d. None of these
4. Nasopharynx opens through ________ of the larynx region into the trachea.
a. Glottis
b. Gullet
c. Epiglottis
d. All of these
5. Which of the following is true about epiglottis
a. Thin elastic cartilaginous flap
b. Prevent food entry into larynx
c. Coughing occurs due to its improper movement
d. All of these
6. The common passage for food and air is
a. Nasal passage
b. Nasopharynx
c. Oropharynx
d. Pharynx
7. Which of the following is not supported by cartilaginous rings
a. Primary bronchioles
b. Tertiary bronchioles
c. Tracheae
d. Alveoli
8. Which of the following is the part of the thoracic chamber
a. Ribs and vertebral column
b. Diaphragm
c. Sternum
d. All of these
9. Epidermis is specialized for:
a. Respiration
b. Absorption
c. Protection
d. All of these
10. Ciliated epithelium in trachea of mammals helps in:
a. Sucking inspired air in.
b. Perceiving sense of smell.
c. Pushing expired air out.
d. Pushing mucus out.
Breathing and Exchange of Gases Human Respiratory System part-2
1.In human beings, oblique fissures are associated with:
a. Right lung
b. Left lung
c. Both lungs
d. None of the above
2. Which of the following comprise the lungs
a. Tracheae along with network of bronchi, bronchioles and alveoli
b. Network of bronchi, bronchioles and alveoli
c. Alveoli only
d. Both A and B
3. Lungs are covered by a double layered membranes which is called
a. Pleural membrane
b. Visceral membrane
c. Pulmonary membrane
d. Parietal membrane
4. Which of the following is true about pleural membranes except
a. Outer pleural membrane is in close contact with the thoracic lining
b. Inner pleural membrane is in contact with the lung surface
c. Pleural fluid is present between them
d. It increases friction on the lung surface
5. Which of the following constitute the conduction part of the respiratory system
a. External nostrils to trachea
b. External nostrils to primary
bronchioles
c. Respiratory bronchioles to alveoli d. External nostrils to terminal bronchioles
6. Which of the following constitute the exchanging part of the respiratory system
a. External nostrils to trachea
b. External nostrils to primary
bronchioles
c. Respiratory bronchioles to alveoli
d. External nostrils to terminal bronchioles
7. Which of the following is the function of the conducting part of the respiratory system?
a. Clears the foreign particle
b. Humidifies air
c. Brings air to body temperature
d. All of these
8. In expiration, diaphragm becomes:
a. Flattened
b. Contract
c. Straightened
d. Arched
9. When you exhale, the diaphragm:
a. Relaxes and arches
b. Relaxes and flattens
c. Contracts and arches
d. Contracts and flattens
10. Which one of the following is called inspiratory muscle in mammals?
a. Radial muscle of diaphragm
b. External intercostal muscle
c. Internal intercostal muscle
d. Pleural muscle
Breathing and Exchange of Gases Mechanism of Breathing
1.Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of
a. expiratory reserve volume
b. inspiratory reserve volume
c. residual volume
d. tidal volume
2. ungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because
a. there is a positive intrapleural pressure
b. there is negative intrapleural pressure pulling at the lung walls
c. there is negative pressure in the lungs
d. pressure in the lungs is higher than the atmospheric pressure
3. Total lungs capacity is approximately:
a. 1200ml
b. 2400ml
c. 4000ml
d. 5800ml
4. In expiration, diaphragm becomes:
a. Flattened
b. Contract
c. Straightened
d. Arched
5. The volume of air expired forcefully after forceful inspiration
a. TV + IRV
b. TV + ERV + IRV
c. TV + ERV + IRV + RV
d. None of these
6. Lungs are made up of air - filled sacs, the alveoli. They do not collapse even after forceful expiration because of
a. Residual volume (RV)
b. Inspiratory Reserve volume (RV)
c. Tidal volume (TV)
d. Expiratory reserve volume (ERV)
7. The maximum volume of air a person can breathe in after a forced expiration is known as :
a. Expiratory Capacity
b. Vital Capacity
c. Inspiratory Capacity
d. Total Lung Capacity
8. Hiccups can be best described as
a. Forceful sudden expiration
b. Forceful contraction of intercostal muscles during deep breathing
c. Vibration of the soft palate during
during breathing while sleeping
d. Jerky incomplete inspiration
9. Epidermis is specialized for:
a. Respiration
b. Absorption
c. Protection
d. All of these
10. In the blood of an adult man the total content of haemoglobin is roughly
a. Several hundred grams
b. Tens of gram (10 - 100 g)
c. Several grams
d. Several hundred milligram
Breathing and Exchange of Gases Exchange of Gases and transport of O2 and CO2
1.More binding of CO2 occurs when pCO2 is ______ and pO2 is _____
a. High, high
b. Low, high
c. High, low
d. Low, Low
2. Diffusion membrane consists of
a. Squamous epithelium of alveoli
b. Endothelium of alveolar capillaries
c. Basement substance between them
d. All of the above
3. pCO2 is high and pO2 is low can be found in
a. Alveoli
b. Tissues
c. Blood
d. Heart
4. In alveoli,
a. pCO2 is high and pO2 is low
b. pCO2 is low and pO2 is high
c. pCO2 is low and pO2 low
d. None of the above
5. As tissue sites, partial pressure of CO2 is high due to _______ process.
a. Anabolic
b. Catabolic
c. Bot A and B
d. Oxidative
6. Which of the following situations would result in the greatest degree of O2 saturation for haemoglobin, assuming PO2 remains constant -
a. Increased H+levels, decreased temperature.
b. Increased CO2levels, increased acidity.
c. Decreased CO2levels, decreased acidity.
d. Increased CO2levels, increased temperature.
7. When you hold your breath the following gas changes in blood would first lead to the urge to breathe ?
a. Falling O2 concentration
b. Rising CO2 concentration
c. Falling CO2 concentration
d. Rising CO2 and falling O2
concentration
8. Lungs are made up of air - filled sacs, the alveoli. They do not collapse even after forceful expiration because of
a. Residual volume (RV)
b. Inspiratory Reserve volume (RV)
c. Tidal volume (TV)
d. Expiratory reserve volume (ERV)
9. The partial pressure of oxygen in the alveoli of the lungs is
a. Equal to that in the blood
b. More than that in the blood
c. Less than that in the blood
d. Less than that of carbon dioxide 10. Reduction in pH of blood will a. Reduce the blood supply to the brain
b. Decrease the affinity of
hemoglobin with oxygen
c. Release bicarbonate ions by the fiver
d. Reduce the rate heart beat
Breathing and Exchange of Gases Regulation of respiration and disorders of respiratory system
1. Which of the following situations would result in the greatest degree of O2 saturation for haemoglobin, assuming PO2 remains constant -
a. Increased H+ levels, decreased temperature.
b. Increased CO2 levels, increased acidity.
c. Decreased CO2 levels, decreased acidity.
d. Increased CO2 levels, increased temperature.
2. A center that moderates the functions of the respiratory rhythm center is located in:
a. Dorsal medulla oblongata
b. Ventral medulla oblongata
c. Pons Varolii
d. Precentral gyrus of the cerebrum
3. Pneumotaxic centre which can moderate the functions of the respiratory rhythm centre is present at:
a. Pons region of brain
b. Thalamus
c. Spinal cord
d. Right cerebral hemisphere
4. Which of the following helps in regulation the respiratory rhythm
a. Respiratory rhythm centre
b. Pneumotaxic centre
c. Aortic arch and carotid artery receptors
d. All if the above
5. The respiratory centre is highly sensitive for
a. CO2
b. O2
c. H+ions
d. Both A and C
6. The respiratory centre is highly insensitive for
a. CO2
b. O2
c. H+ions
d. Both 1 and 3
7. Aortic arch and carotid artery receptors cannot recognise changes in
1. CO2 concentration
2. O2 concentration
3. H+ ions concentration
4. All of the these
8. Consider the characters of a respiratory control center in humans :
I. It is located in pons
II. It moderates the functions of respiratory rhythm center
III. Its absence results in an increase in depth of respiration
The respiratory control center is :
a. Pneumotaxic center
b. Apneustic center
c. Chemosensitive zone
d. Dorsal group
9. Difficulty in breathing due to
inflammation of bronchi and bronchioles leads to
a. Asthma
b. Emphysema
c. Occupational lung disease
d. Rhinitis
10. Which of the following is not a symptom of asthma ?
a. Difficulty in breathing
b. Breathing noisily / wheezing
c. Alveolar walls are damaged
d. Inflammation of bronchi and bronchioles
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