Biology

Respiration and Gas Exchange

989 Questions

Access a targeted set of questions on respiration and gas exchange for competitive exams. Topics include lung volumes, the mechanism of breathing, and respiratory anatomy. Understanding these physiological processes is essential for scoring well.

Lung volumes and capacitiesBreathing mechanismsRespiratory anatomyGas exchange processes

Respiration and Gas Exchange Questions

Multiple choice botany mineral nutrition in plants mechanism of absorption mineral absorption significance of transpiration

Salt respiration is?

  1. Linking of ion movement with respiratory chain

  2. Active increase in respiration during mineral absorption

  3. Decrease in respiration during salt absorption

  4. Secretion of salt through respiratory channels
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Salt respiration refers to the observed increase in the rate of respiration in plant roots when they are placed in a salt solution, as energy is required for active mineral absorption.

Multiple choice biology respiration in living organisms breathing in plants mode of respiration in plants process of respiration

Respiratory roots are known as

  1. velamen

  2. pneumatophores

  3. hydathodes

  4. prop roots
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pneumatophores are specialized roots that grow upwards against gravity to facilitate gas exchange in waterlogged or swampy soil. Velamen is a spongy tissue in epiphytic roots, hydathodes are involved in guttation, and prop roots provide structural support.

Multiple choice biology respiration in living organisms breathing in plants mode of respiration in plants process of respiration

During respiration there is

  1. gain in dry weight

  2. loss in dry weight

  3. no change in dry weight

  4. increase in the overall weight
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

During respiration, due to consumption of organic resources in the cell the dry weight decreases. In respiration, there is a loss in dry weight.

Hence, the correct answer is 'loss in dry weight'.

Multiple choice biology food components and nutrition water as nutrient basics of water pollution sources of water

In a living systems, water is involved as a chemical in

  1. Photosynthesis and repiration

  2. Synthesis of polymers

  3. Hydrosis of biochemicals

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water is a reactant in photosynthesis, a product in respiration, a reactant in hydrolysis (breaking down polymers), and involved in the synthesis of polymers (dehydration synthesis).

Multiple choice frog - control and coordination system frog animal diversity - ii (phylum: chordata) organ and organ systems in animals zoology

What is true about buccophayngeal respiration in frog-

  1. Sternohyal muscle contracted-Buccal air pumped into lungs. petrohyal muscle cotractedpulmonary air pumped out.

  2. Sternohyal muscle contracted-atmospheric air sucked in, petrohyal muscle contract-Buccal air pumped out

  3. Sterohyal muscle relaxed-atmospheric air pumped out, petrohyal muscle contracted-Buccal air pumped into lungs

  4. None
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In buccopharyngeal respiration, the contraction of sternohyal muscles lowers the floor of the buccal cavity to draw in air, while the contraction of petrohyal muscles raises the floor to pump air into the lungs or out of the mouth.

Multiple choice factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

Respiration results in

  1. Increase in weight

  2. Decreases in weight

  3. No change in weight

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Respiration result in a decrease in dry weight. During respiration when we breathe, oxygen enter in the body of an organism. Due to the presence of oxygen, the breakdown of glucose into pyruvate and other products takes place. At last, carbon dioxide, as well as some energy, are also released out from the body through the process of exhalation.

So, the correct answer is 'decrease in weight'.

Multiple choice factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

The increases respiration rate due specifically to anion uptake is called _______________.

  1. Salt respiration

  2. Active absorption

  3. Exchange absorption

  4. Ground respiration
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Salt respiration refers to the increase in the rate of respiration observed in plant roots when they are actively absorbing ions (anions or cations) from the soil against a concentration gradient.

Multiple choice factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

Which of the following is necessary for respiration in plants?

  1. Carbon dioxide

  2. Oxygen

  3. Chlorophyll

  4. Light
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Oxygen is the final electron electron acceptor in the electron transport chain, which occurs in the mitochondria. So, for aerobic respiration oxygen is must. Respiration decreases with decreased available oxygen. Under circumstances where no oxygen is present, like in poorly draining soil, anaerobic respiration (fermentation) occurs.

Multiple choice zoology gas exchange and smoking respiration in human beings respiration and associated structures respiration in humans respiratory organs in humans

What is correct?

  1. Pulmonary ventilation is equal to alveolar ventilation

  2. Alveolar ventilation is less than pulmonary ventilation

  3. Alveolar ventilation is more than pulmonary ventilation

  4. The two are variable
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pulmonary ventilation is the total volume of air moved into and out of the lungs per minute. Alveolar ventilation is lower because it excludes the air that remains in the anatomical dead space where no gas exchange occurs.