Top 250+ Solved Respiration MCQ Questions Answer
Q. Formation of ATPs in mitochondria is known as
a. Oxidative phosphorylation
b. Cyclic photophosphorylation
c. Noncyclic photophosphorylatian
d. Fermentation
Q. Formation of ATP occurs
a. In outer mitochondrial membrane
b. On F1 particles
c. Mitochondrial matrix
d. In mitochondrial DNA
Q. Phosphorylation means
a. Formation of reduced coenzyme
b. Formation of PGA
c. Formation of ATP
d. Breakdown of ATP
Q. Regarding the chemical control of breathing, which statement is INCORRECT?
a. central chemoreceptors are located in the medulla oblongata
b. hypoxia makes an individual more sensitive to increases in arterial carbon dioxide
c. arterial oxygen less than 70mmHg markedly stimulates respiration via the carotid bodies
d. carotid bodies have the highest blood flow, per unit time per 100g, of any tissue in the body
e. carbon dioxide is more important than oxygen in respiratory control
Q. Fick’s law states that:
a. Va = (VCO2/PCO2) x K
b. V = (A.D.(P1 – P2))/T
c. pH - -LOG[H+]
d. P1V1 = P2V2
e. V1/V2 = T1/2
Q. Regarding surfactant, which statement is INCORRECT?
a. it predominantly consists of phospholipid
b. it is increased by long-term 100% oxygen therapy
c. hydrophobic “tails” face into alveolar lumen
d. it is decreased by cigarette smoking
e. pulmonary oedema is a consequence of its absence
Q. Which of the following DOES NOT shift the O2 dissociation curve to the right?
a. increased temperature
b. increased PCO2
c. increased H+
d. increased DPG
e. increased carboxy haemoglobin
Q. Regarding exercise, which statement is INCORRECT?
a. the energy cost of breathing is up to 10% of total energy expenditure
b. total pulmonary ventilation increases by up to 20 fold
c. total oxygen consumption increases by up to 20 fold
d. total carbon dioxide production increases by up to 40 fold
e. P5O increases
Q. Total lung capacity is equal to:
a. vital capacity + tidal volume
b. vital capacity + functional residual capacity
c. tidal volume + residual volume
d. functional residual capacity + tidal volume
e. vital capacity + residual volume
Q. Regarding compliance, which statement is INCORRECT?
a. functional residual capacity is the equilibrium volume when elastic recoil of lung is balanced by normal tendency for chest wall to spring out
b. hysteresis is due to frictional resistance to air movement
c. compliance is greater in expiration than in inspiration
d. compliance is increased in emphysema
e. compliance is a dynamic measure of lung and chest wall recoil
Q. Which of the following is NOT involved in the control of ventilation?
a. peripheral chemoreceptors
b. lung stretch receptors
c. basal ganglia
d. pons
e. respiratory muscles