Which of the following elements is necessary for normal thyroid function?
Magnesium
Iodine
Sodium
Calcium
The Correct Answer is B
A. Magnesium plays a role in many enzymatic reactions and muscle function, but it is not essential for thyroid hormone production.
B. Iodine is an essential element for normal thyroid function. The thyroid gland uses iodine to produce thyroid hormones (T3 and T4), which are critical for regulating metabolism. This is the correct element necessary for thyroid function.
C. Sodium is important for maintaining fluid balance and nerve function, but it is not directly involved in thyroid hormone production.
D. Calcium is important for bone health and cellular processes, but it does not directly influence thyroid hormone synthesis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. The parathyroid glands regulate calcium and phosphate levels in the blood through the release of parathyroid hormone (PTH), not testosterone.
B. The anterior pituitary gland regulates the release of testosterone through the secretion of luteinizing hormone (LH), which stimulates the testes to produce testosterone. This is the correct gland involved in testosterone regulation.
C. The posterior pituitary releases hormones like oxytocin and antidiuretic hormone (ADH), but it does not regulate testosterone production.
D. The thyroid gland is responsible for regulating metabolism through thyroid hormones (T3 and T4), not testosterone.
Correct Answer is B
Explanation
A. Vasodilation refers to the widening of blood vessels, which typically lowers blood pressure by decreasing the resistance within the vessels.
B. Increased cardiac output means the heart pumps more blood per minute, which raises blood pressure by increasing the volume of blood circulating through the arteries. This is the correct answer.
C. Decreased heart rate would typically lower blood pressure, as the heart is pumping less frequently, reducing the force exerted on the blood vessels.
D. Parasympathetic stimulation generally lowers blood pressure as it promotes relaxation and reduces the heart rate, which in turn reduces cardiac output.
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