Question

Which muscle pair plays a role in respiration? a. intertransversarii, interspinales b. semispinalis cervicis, semispinalis thoracis c. trapezius, rhomboids d. diaphragm, scalene

Name: Problem 18, Chapter 11: Anatomy & Physiology
Uploaded: 2020-06-27T16:35:15-08:00
Duration: 29 s
Channel: Chinwe Abaraoha
Description: Which muscle pair plays a role in respiration? a. intertransversarii, interspinales b. semispinalis cervicis, semispinalis thoracis c. trapezius, rhomboids d. diaphragm, scalene

   Which muscle pair plays a role in respiration?
a. intertransversarii, interspinales
b. semispinalis cervicis, semispinalis thoracis
c. trapezius, rhomboids
d. diaphragm, scalene

Anatomy & Physiology

J. Gordon Betts,… 1st Edition

Chapter 11, Problem 18

Instant Answer

Solved by Expert Chinwe Abaraoha

06/27/2020

Step 1

- The intertransversarii and interspinales are muscles located in the spine and they are responsible for lateral flexion and extension of the spine, not respiration. So, option (a) is not correct. - The semispinalis cervicis and semispinalis thoracis are also Show more…

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Which muscle pair plays a role in respiration? a. intertransversarii, interspinales b. semispinalis cervicis, semispinalis thoracis c. trapezius, rhomboids d. diaphragm, scalene

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Key Concepts

Respiratory Muscles

Respiratory muscles are those that contribute to the mechanics of breathing by expanding and contracting the thoracic cavity. They include both primary muscles, which are essential for normal breathing, and accessory muscles, which assist during increased respiratory demand.

Diaphragm

The diaphragm is the primary muscle of respiration. Its contraction flattens the dome-shaped muscle, thereby increasing the volume of the thoracic cavity and reducing intrathoracic pressure, which allows air to flow into the lungs.

Scalene Muscles

The scalene muscles are considered accessory respiratory muscles. They aid in the process of breathing by elevating the first and second ribs, which further increases the thoracic cavity's volume and facilitates inspiration, especially during periods of increased respiratory demand.

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