Respiratory Mechanics - OpenStax A&P 2e Ch22

What percentage of inspiration during quiet breathing is attributed to the diaphragm?

• 50%

• 75%

• 25%

• 100%

Which muscle group is primarily responsible for elevating the ribcage during inspiration?

• Internal Intercostals

• External Obliques

• External Intercostals

• Rectus Abdominis

What is the primary force responsible for expiration during quiet breathing?

• Diaphragm contraction

• Gravity

• External Intercostals

• Abdominal muscles

During labored breathing, such as during exercise, what is increased?

• Less muscle utilization

• More muscle utilization

• No change in muscle utilization

• Decreased muscle utilization

What role do skeletal muscles play in speech production?

• They vibrate the vocal cords directly.

• They control the opening of the vocal cords.

• They produce sound waves.

• They amplify the sound.

Which of the following is NOT involved in conscious sound production?

• Tongue

• Lips

• Soft palate

• Nasal passage

What aspect of sound is controlled by the opening of the vocal cords?

• Frequency

• Loudness and pitch

• Duration

• Timbre