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Ch. 42 - Gas Exchange and Circulation
Freeman - Biological Science 8th Edition
Freeman8th EditionBiological ScienceISBN: 9780138276263Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoFreeman 8th EditionCh. 42 - Gas Exchange and CirculationProblema 2
Capitolo 42, Problema 2

Identify at least two advantages of breathing air instead of water.

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Air is less dense and less viscous than water, which makes it easier and requires less energy for organisms to move air in and out of their respiratory systems compared to water.
Air contains a higher concentration of oxygen compared to water. This allows organisms that breathe air to obtain oxygen more efficiently and effectively than those breathing water.

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Oxygen Availability

Air contains a higher concentration of oxygen compared to water, making it more efficient for organisms to extract the oxygen they need for cellular respiration. This is crucial for sustaining metabolic processes, as oxygen is a key reactant in the production of ATP, the energy currency of cells.
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Diffusion Rates

Gases diffuse more rapidly in air than in water due to the lower density and viscosity of air. This means that organisms that breathe air can take in oxygen more quickly and efficiently, allowing for faster respiratory rates and improved energy production.
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Diffusion

Energy Expenditure

Breathing air generally requires less energy than extracting oxygen from water. Aquatic organisms often expend significant energy to move water over their gills, while terrestrial organisms can utilize lungs to efficiently draw in air, leading to lower overall energy costs for respiration.
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Pratica correlata
Domanda del libro di testo

Which of the following statements regarding the insect tracheal system is/are correct? Select True or False for each statement.

T/F Tracheae dilate and constrict during flight or other types of movement, functioning as a 'breathing' mechanism.

T/F Spiracles open into the body cavity, allowing direct contact between the air and hemolymph.

T/F Tracheae carry oxygen to alveoli; here the oxygen diffuses into the hemolymph to be delivered to tissues.

T/F Spiracles can close to minimize water loss.

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Domanda del libro di testo

Explain how each parameter in Fick's law of diffusion is reflected in the structure of the mammalian lung.

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Domanda del libro di testo

Which of the following promotes oxygen release from hemoglobin?

a. A decrease in temperature

b. An increase in O₂ level.

c. A decrease in pH

d. A decrease in carbonic anhydrase activity

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Domanda del libro di testo

Describe the disadvantages of an open circulatory system relative to a closed circulatory system.

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