Which of the following structures separates the right and left pleurae?
Intercostal muscles
Pleural cavity
Mediastinum
Diaphragm
The Correct Answer is C
a. Intercostal muscles: Intercostal muscles are located between the ribs and help with breathing movements. They don't separate the pleurae.
b. Pleural cavity: The pleural cavity is the space between the pleura and the lung on each side. There isn't another pleural cavity within this space.
c. Mediastinum: The pleura are two thin membranes that line the lungs and inner chest wall. The mediastinum is the central compartment of the thoracic cavity, containing essential structures like the heart, trachea, esophagus, and major blood vessels. It separates the right and left pleural cavities.
d. Diaphragm: The diaphragm is a dome-shaped muscle separating the thoracic cavity from the abdominal cavity. While it plays a role in respiration, it doesn't directly separate the pleurae
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
a. Smooth: Correct. Smooth muscle cells in the walls of blood vessels regulate their diameter through contraction and relaxation.
b. Striated: Striated muscles, also known as skeletal muscles, are involved in voluntary movements and are not responsible for regulating blood vessel diameter.
c. Cardiac: Cardiac muscle is found in the heart and is responsible for pumping blood, not regulating blood vessel diameter.
d. Skeletal: Skeletal muscles control voluntary movements and are not involved in regulating blood vessel diameter.
Correct Answer is C
Explanation
a. Neutral feedback: This term is not typically used in the context of endocrine regulation.
b. Stimulating feedback: This is not a standard term in endocrine homeostasis mechanisms.
c. Negative feedback: Correct. Negative feedback is the primary mechanism by which endocrine systems maintain homeostasis. It involves reducing the output or activity of any organ or system back to its normal range of functioning.
d. Positive feedback: Positive feedback amplifies changes rather than stabilizing them, and is less common in maintaining homeostasis
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