This document contains a science quiz with 6 multiple choice questions about respiration, the digestive system, lung volumes, cell structure, and mitochondria. The questions cover topics like the steps of respiration, the function of mucus and bicarbonates in the stomach, definitions of lung volumes, why the cell is considered an open system, and which cell type lacks mitochondria. The answers to the questions are also provided.
2. 1. Arrange the given steps of
respiration in correct sequence.
P. Transport of gases by the blood
Q. Utilisation of oxygen
R. Pulmonary ventilationR. Pulmonary ventilation
S. Diffusion of O2 and CO2 between
blood and tissues
T. Diffusion of O2 and CO2 across
alveolar membrane
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3. 2.What is the function of mucus and
bicarbonates present in the gastric juice?
a. They provide acidic pH optimal for
action of pepsin.
b. They help in thorough mixing up of the
food in the intestine.food in the intestine.
c. They lubricate and protect the mucosal
epithelium from excoriation by HCl.
d. They activate enzymes of pancreatic
juice.
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4. 3. Which of the following statement is correct?
a. During inspiration, external intercostal
muscles and diaphragm contract.
b. Volume of air remaining in lungs even after a
forcible expiration is called expiratory
reserve volume.reserve volume.
c. Partial pressure of oxygen in deoxygenated
blood is 104mm Hg.
d. Emphysema is a difficulty in breathing due to
inflammation of bronchi and bronchioles.
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5. 4. Cell is completely covered by a
plasma membrane but considered as
an open system because
a. It accumulates inorganic substances.
b. It has intracellular compartments.b. It has intracellular compartments.
c. It allows transfer of substance and
energy.
d. It has ability to divide and form new
cells.
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6. 5. All the eukaryotic cells contain
mitochondria, except
a. sperms
b. Erythrocytesb. Erythrocytes
c. Oocytes
d. Heptocytes.
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7. Answers
1. T P S R Q
2. d. They activate enzymes of pancreatic juice.
3. b. Volume of air remaining in lungs even after
a forcible expiration is called expiratorya forcible expiration is called expiratory
reserve volume.
4. c. It allows transfer of substance and energy.
5. b. erythrocytes
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