2.1.4

When the external intercostals contract, the internal intercostals:

• Contract concentrically

• Contract eccentrically

• Contract Isometrically

• Relax

Air moves into the lungs when:

• Thoracic volume decreases and thoracic pressure increases

• Thoracic volume increases and thoracic pressure decreases

• Thoracic volume increases and thoracic pressure increases

• Thoracic volume decreases and thoracic pressure decreases

Air moves out of the lungs when:

• Thoracic volume decreases and thoracic pressure increases

• Thoracic volume increases and thoracic pressure decreases

• Thoracic volume increases and thoracic pressure increases

• Thoracic volume decreases and thoracic pressure decreases

During inhalation:

• The diaphragm contracts & moves upward becoming dome shaped

• The diaphragm contracts & flattens

• The diaphragm relaxes & moves upward becoming dome shaped

• The diaphragm relaxes & flattens

During exhalation:

• The diaphragm contracts & moves upward becoming dome shaped

• The diaphragm contracts & flattens

• The diaphragm relaxes & moves upward becoming dome shaped

• The diaphragm relaxes & flattens

When the external intercostals contract:

• The ribcage moves outward & upward

• The ribcage moves outward & downward

• The ribcage moves inward & upward

• The ribcage moves inward & downward

When the internal intercostals contract:

• The ribcage moves outward & upward

• The ribcage moves outward & downward

• The ribcage moves inward & upward

• The ribcage moves inward & downward

When the internal intercostals contract, the external intercostals:

• Contract concentrically

• Contract eccentrically

• Contract Isometrically

• Relax

Tags

NGSS.HS-LS1-3

What accessory muscles contract during inhalation?

• Scalene muscles

• Sternocleidomastoid

• Abdominal Muscles

• Pectoralis Minor

What accessory muscles contract during exhalation?

• Scalene muscles

• Sternocleidomastoid

• Abdominal Muscles

• Pectoralis Minor