Science, asked by harshitraj4471913, 1 month ago

11. Name the process in which plants use sunlight to prepare their food.
12. Cocaine, heroin, tobacco are forms of a harmful substance. What are they?​

Answers

Answered by melonthekiwi
1
11. Photosynthesis
12. Drugs


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Answered by rorsoni867
0

Answer:

11 The process by which land plants produce their own food using sunlight and carbon dioxide is known as photosynthesis (Figure 1). While carbon dioxide is absorbed by the leaves, the sunlight is captured by a chemical molecule in the plant, called chlorophyll (Chl). All photosynthetic organisms contain Chl.

12 The nicotine in any tobacco product readily absorbs into the blood when a person uses it. Upon entering the blood, nicotine immediately stimulates the adrenal glands to release the hormone epinephrine (adrenaline). Epinephrine stimulates the central nervous system and increases blood pressure, breathing, and heart rate. As with drugs such as cocaine and heroin, nicotine activates the brain’s reward circuits and also increases levels of the chemical messenger dopamine, which reinforces rewarding behaviors. Studies suggest that other chemicals in tobacco smoke, such as acetaldehyde, may enhance nicotine’s effects on the brain.

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