This set of Human Physiology Questions and Answers for Campus interviews focuses on “Breathing and Exchange of Gases – Respiratory System in Mammals”.
1. Respiration is controlled by _________
a) Cerebrum
b) Cerebellum
c) Medulla oblongata
d) Hypothalamus
View Answer
Explanation: Respiration is controlled by Medulla oblongata. Medulla oblongata is located in brainstem. It also controls circulation.
2. The majority of carbon dioxide produced by the body is transported to lungs _______
a) Dissolved in blood
b) As carbonates
c) As bicarbonates
d) Attached to hemoglobin
View Answer
Explanation: The majority of carbon dioxide produced by the body is transported to lungs in the form of bicarbonates. It is then expelled out from lungs.
3. Which one of the following mammalian cells are not capable of metabolizing glucose to carbon dioxide aerobically?
a) RBC
b) WBC
c) Liver cells
d) Unstraited muscle cells
View Answer
Explanation: Red blood cells are not capable of metabolizing glucose to carbon dioxide aerobically. They contain hemoglobin pigment.
4. During inspiration the diaphragm _______
a) Expands
b) Contracts
c) No change
d) Relaxes
View Answer
Explanation: The process of breathing is divided into inspiration and expiration. The process of inhalation is called as inspiration. During this process the diaphragm contacts and the air gets filled into the lungs.
5. Respiration is a physical process and depends on the principle of diffusion.
a) True
b) False
View Answer
Explanation: Respiration depends partly on the principle of diffusion and facilitated diffusion. Diffusion is flow of substance from higher concentration to lower concentration region.
6. Cramps during exercise are caused due to _______
a) Chemiosmosis
b) Glycolysis inhibition
c) Lactic acid fermentation
d) Alcohol fermentation
View Answer
Explanation: Cramps during exercise are caused due to lactic acid fermentation.
7. A person can expel all the air from the lungs.
a) True
b) False
View Answer
Explanation: A person cannot expel all the air from lungs. A small amount of air will be present in the lungs.
8. Which of the following is the product of the Krebs cycle?
a) ATP
b) NADH
c) FADH
d) All of the mentioned
View Answer
Explanation: The end products of the Krebs cycle consist of 6 NADH, 2 FADH, 4 carbon dioxide and 2 ATPs.
9. Which of the following Produces maximum ATP?
a) Krebs cycle
b) Glycolysis
c) Fermentation
d) Oxidative Phosphorylation
View Answer
Explanation: Oxidative Phosphorylation is a metabolic pathway in which cells use an enzyme to oxides nutrients. it releases energy to produce ATP. It takes place in mitochondria.
10. RQ is _____________
a) Ratio of CO2 produced to substrate consumed
b) Ratio of CO2 produced to O2 consumed
c) Ratio of oxygen consumed to CO2 produced
d) Ratio of oxygen consumed to water produced
View Answer
Explanation: RQ is the respiration quotient. It is a dimensionless number. RQ is the ratio of carbon dioxide produced by the body to oxygen consumed by the body.
Sanfoundry Global Education & Learning Series – Human Anatomy and Physiology.
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