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Alexeev081 [22]
3 years ago
11

Which muscles assist in inhalation when running up the stairs? A) sternocleidomastoid, pectoralis major, scalenes B) sternocleid

omastoid, pectoralis minor, scalenes C) rectus abdominis, pectoralis major, scalenes D) rectus abdominis, pectoralis major, internal intercostals E) sternocleidomastoid, pectoralis major, internal intercostals
Biology
2 answers:
Ulleksa [173]3 years ago
7 0

Answer:

Sternocleidomastoid, pectoralis minor, scalenes

Explanation:

During normal inhalation, contraction of the diaphragm and the contraction of external intercostals expands the chest cavity. The increased volume of the thoracic cavity results in reduced alveolar pressure than the atmospheric pressure to facilitate the flow of air into the lungs in response to the pressure gradient.

During deep inhalation as it occurs when running up the stairs, the accessory muscles of inhalation also participate to increase the volume of the chest cavity. The contraction of scalene and sternocleidomastoid muscles increase the volume of the chest cavity further to create a greater drop in alveolar pressure.

During forceful inhalation, the sternocleidomastoid muscles serve to elevate the sternum, the scalene muscles serve to elevate the first two ribs while the pectoralis minor elevate the third through fifth ribs.

o-na [289]3 years ago
5 0

Answer:

The correct answer will be option-B

Explanation:

The muscles used in the breathing process involves the thoracic muscles like external intercostal muscles, internal intercostal muscles, muscles attached to thoracic muscles like pectoralis major and minor and the accessory muscles like sternocleidomastoid muscle and scalene muscles.

The muscles involved in the inhalation process during running up the stairs are scalenes which help elevate the upper first and second ribs, the sternocleidomastoid muscle which helps to raise the sternum and the pectoralis minor.

Thus, Option-B is the correct answer.

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Rajus classmates should be educated on the dangers of bull_ying and the benefits of being kind instead.

<h3>What is bull_ying?</h3>

Bull_ying is an action which is directed to another individual due to real or perceived power imbalance to cause the individual fear or h_arm.

The dangers of bull_ying include:

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By teasing Raju, her classmates are bull_ying her.

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Learn more about bull_ying at: brainly.com/question/1460915

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3 0
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labwork [276]

Answer:

The answer is A.

Explanation:

Since only 1 of the options is wrong, i assume you are looking for that one.

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Innate immunity is present at birth which consists our skin protects us physically, chemical substances in our blood that protect us from bacteria and infections and also our blood cells such as T cells.

Since innate immunity forms one of the first lines of defense in our immune system and is the first to respond to a threat in a few hours down to as little as minutes, it is not slower than adaptive immunity in its response to infections and pathogens.

I hope this answer helps.

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