Question

In the carbon cycle, the human body directly returns carbon to the atmosphere in this way:
A. Formation of glucose
B. Urination
C. Photosynthesis
D. Cellular respiration

Answer 1

Hint:
Before we proceed into the problem, it is important to know the definition of the carbon cycle.
The carbon cycle in humans refers to the exchange of carbon between different parts of Earth's biosphere. The cycles involve photosynthesis, respiration, and decomposition. Photosynthesis converts light energy into chemical energy that is used by plants to create glucose from water and CO₂. Through this process, plants help to regulate atmospheric concentrations of greenhouse gases like

Complete step by step answer:
A significant amount of carbon is released straight into the atmosphere through human respiratory activities.
Glucose is primarily generated from carbon dioxide via photosynthesis. This procedure entails the fixation of atmospheric pollutants. Other physiological processes, such as gluconeogenesis, can result in glucose production from non-carbohydrate sources such as glucogenic amino acids. This does not directly result in the publication of is released into the atmosphere.
Urination is the process by which any ureotelic organism releases urine. This is also not a direct release into the environment. Because humans are heterotrophs, they do not perform photosynthesis.
Therefore, in the carbon cycle, the human body directly returns carbon to the atmosphere through cellular respiration.

Option ‘D’ is correct

Note:
Cellular respiration is the process by which energy is produced in cells. This process involves breaking down glucose (sugar) into oxygen and water, using enzymes called catabolic processes. The products of these reactions are used to fuel chemical reactions inside the cell or to build new molecules from smaller components. Cellular respiration usually occurs in two phases: anaerobic and aerobic.