Pre Video Test - Breathing & Exchange of GasesContact Number: 9667591930 / 8527521718Pre Video Test - Breathing & Exchange of GasesContact Number: 9667591930 / 8527521718Which of the following is entirely made of cartilage?
1. Nasal septum
2. Larynx
3. Glottis
4. Trachea
Trachea divides into two right and left primary bronchi at the level of:
1. Seventh cervical vertebra
2. Third thoracic vertebra
3. Fifth thoracic vertebra
4. Seventh thoracic vertebra
Contraction of diaphragm:
| 1. | Increases the volume of the thoracic chamber in the antero-posterior axis |
| 2. | Increases the volume of the thoracic chamber in the dorso-ventral axis |
| 3. | Decreases the volume of the thoracic chamber in the antero-posterior axis |
| 4. | Decreases the volume of the thoracic chamber in the dorso-ventral axis |
Most of the aquatic arthropods respire through:
1. diffusion over the entire body surface
2. gills
3. tracheae and tracheoles
4. skin
What prevents the entry of food into the larynx during deglutition?
1. A thin elastic cartilaginous flap
2. A thick fibrous cartilaginous flap
3. A thick elastic cartilaginous flap
4. A thin calcified cartilaginous flap
The trachea divides into a right and a left primary bronchus at the level of:
1. 2nd thoracic vertebra
2. 3rd thoracic vertebra
3. 5th thoracic vertebra
4. 12th thoracic vertebra
The following two statements:
I. The lungs are situated in the thoracic chamber which is anatomically an air-tight chamber.
II. This arrangement is essential as we cannot directly alter the thoracic volume.
1. Both I and II are correct and II correctly explains I
2. Both I and II are correct but II does not explain I
3. I is correct and II is incorrect
4. Both I and II are incorrect
Regarding pulmonary capacities, the maximum volume of air a person can breathe in after a forced expiration can also be defined as:
1. Total volume of air a person can inspire or expire after a normal inspiration or expiration
2. Volume of air that will remain in the lungs after a normal expiration
3. Maximum volume of air a person can breathe out after a forced inspiration
4. Total volume of air accommodated in the lungs at the end of a forced inspiration
Which of the following will not be equal in normal physiological conditions?
| 1. | Partial pressure of oxygen in deoxygenated blood and partial pressure of oxygen in tissues |
| 2. | Partial pressure of carbon dioxide in alveoli and partial pressure of carbon dioxide in oxygenated blood |
| 3. | Partial pressure of oxygen in oxygenated blood and partial pressure of oxygen in alveoli |
| 4. | Partial pressure of carbon dioxide in tissues and partial pressure of carbon dioxide in deoxygenated blood |
Binding of oxygen with hemoglobin is primarily related to:
1. Partial pressure of carbon dioxide
2. Partial pressure of oxygen
3. H+ ion concentration in body fluids
3. Presence of 2,3-DPG in erythrocytes
Under normal physiological conditions, what amount of oxygen is delivered to the tissues?
1. 4 ml
2. 5 ml
3. 15 ml
4. 20 ml
Identify the incorrect statement regarding the enzyme carbonic anhydrase:
1. RBCs contain a very high concentration of this enzyme
2. The enzyme is absent in the plasma
3. It facilitates the reaction catalyzed in both directions
4. It is a metalloenzyme
Pneumotaxic center:
1. moderates the function of the rhythm center
2. establishes the respiratory rhythm
3. is located in the medulla oblongata
4. reduces the duration of expiration and thereby alters the respiratory rate
Pulmonary fibrosis is a pathological hallmark of:
1. Chronic obstructive lung disease
2. Bronchial asthma
3. Viral Pneumonia in children
4. Occupational lung diseases
Involuntary hyperventilation during an anxiety attack can cause the person to become faint because of:
1. increased CO2 levels caused by increase in cellular respiration, reducing brain perfusion and causing ischemia
2. decreased O2 levels in the blood, causing cells to lack enough ATP
3. effects of increased O2 levels in the blood and consequent constriction of cerebral blood vessels
4. lowered CO2 levels in the blood and consequent constriction of cerebral blood vessels
Which of the following is one of the physiological adaptations that occur in the human body at very high altitudes?
1. The kidney releases EPO to stimulate an increase in hematocrit.
2. The heart rate decreases.
3. Because of a lower PO2, the respiratory rate declines.
4. The percentage of hemoglobin saturation increases.
The peripheral chemoreceptors are:
1. more sensitive to a decrease in PCO2 than to a decrease in PO2
2. stimulated by hypocapnia
3. located in the medulla oblongata of the brain stem
4. more sensitive to a decrease in PO2 than to a decrease in PCO2
Assertion: Dissociation of from carbamino haemoglobin takes place at alveolar level.
Reason: High concentration at alveolar level promotes the dissociation of carbaminohaemoglobin.
All the following facilitate binding of oxygen to hemoglobin at alveoli except:
1. Low pO2
2. Low pCO2
3. Lesser H+ concentration
4. Lower temperature
The maximum volume of air a person can breathe in after a forced expiration is called as:
1. Inspiratory capacity
2. Functional residual capacity
3. Vital capacity
4. Total lung capacity