Correct option is B
Correct Answer: B 15-18 times
Explanation:
An adult human being at rest typically breathes 15 to 18 times per minute. This is the normal respiratory rate for a healthy adult, allowing sufficient oxygen intake and carbon dioxide elimination to maintain the body’s metabolic requirements at rest. This rate can vary slightly depending on factors such as age, physical activity, fitness levels, and overall health.
An adult human being at rest typically breathes 15 to 18 times per minute. This is the normal respiratory rate for a healthy adult, allowing sufficient oxygen intake and carbon dioxide elimination to maintain the body’s metabolic requirements at rest. This rate can vary slightly depending on factors such as age, physical activity, fitness levels, and overall health.
Information Booster:
- The respiratory rate of 15-18 breaths per minute is considered normal for adults at rest.
- This rate is regulated by the medulla oblongata in the brain, which controls involuntary respiration.
- Breathing rates below this range (e.g., bradypnea) or above this range (e.g., tachypnea) may indicate health issues.
- Emotional states such as stress or anxiety can temporarily increase the breathing rate.
- Physical exercise significantly increases the breathing rate, often reaching up to 40-50 breaths per minute in well-conditioned athletes.
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