Emma, a 25-year-old athlete, undergoes a physical exam. During deep inspiration, which muscle is primarily responsible for increasing the vertical dimensions of her thoracic cavity?
Transversus thoracis
Internal intercostals
Diaphragm
External intercostals
The Correct Answer is C
A. Transversus thoracis is involved in expiration rather than inspiration.
B. Internal intercostals primarily aid in forced expiration.
C. The diaphragm contracts and moves downward during inspiration, increasing the vertical dimensions of the thoracic cavity and allowing air to enter the lungs.
D. External intercostals help elevate the ribs during inspiration but do not contribute significantly to increasing the vertical dimensions of the thoracic cavity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Elevated C-reactive protein levels are not directly associated with an increased risk of hemorrhage.
B. C-reactive protein elevation is not indicative of an allergic response to medication.
C. C-reactive protein levels do not directly correlate with dehydration or fluid imbalance.
D. Elevated C-reactive protein levels are often seen in response to inflammation, including that caused by infection. In a post-operative patient, this elevation could indicate the early stages of an infection, and thus should be a priority concern for the nurse.
Correct Answer is D
Explanation
A. While an increasing respiratory rate may indicate respiratory distress, in the context of a closed head injury, decreasing level of consciousness (LOC) is a more concerning trend as it suggests worsening neurological status.
B. A rising heart rate may indicate pain, anxiety, or physiological stress, but it's not as directly related to the severity of a closed head injury.
C. While decreasing blood pressure can be concerning, especially if it indicates hypovolemic shock, in the context of a closed head injury, the primary concern is neurological status.
D. A decreasing LOC suggests worsening neurological function, which can indicate increased intracranial pressure (ICP) or neurological deterioration.
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