#1
Which muscle is primarily responsible for inspiration during quiet breathing?
Diaphragm
ExplanationContracts to increase thoracic cavity volume.
#2
Which of the following is NOT a primary respiratory muscle?
Pectoralis minor
ExplanationNot directly involved in respiration.
#3
During forceful expiration, which muscles play a significant role?
Internal intercostals and abdominals
ExplanationContract to decrease thoracic cavity volume.
#4
Which muscle group assists in increasing the thoracic cavity's volume during inspiration?
External intercostals and diaphragm
ExplanationWork together to expand thoracic cavity.
#5
What is the function of the internal intercostal muscles during expiration?
Depress the ribs
ExplanationDecrease rib cage volume.
#6
Which muscle assists in forced inspiration by elevating the first and second ribs?
Scalenes
ExplanationLifts ribs to expand thoracic cavity.
#7
Which muscle group is involved in the process of coughing?
Abdominals
ExplanationExpels air by compressing abdominal viscera.
#8
Which muscle assists in forced expiration by compressing the abdominal contents?
Rectus abdominis
ExplanationContracts to increase abdominal pressure.
#9
Which nerve innervates the diaphragm, the primary muscle of respiration?
Phrenic nerve
ExplanationControls diaphragm contraction.
#10
What is the primary action of the accessory muscles of respiration?
To aid in inspiration during exercise
ExplanationAssist primary muscles during exertion.
#11
Which respiratory muscle is primarily responsible for speech production?
Sternocleidomastoid
ExplanationAids in altering vocal tract shape.