Michael has been diagnosed with frontal lobe abnormalities. As part of his care and evaluation, it is important to understand the specific functions that the frontal lobe is responsible for.
Which of the following functions are primarily controlled by the frontal lobe?
Decision-making, problem-solving, and planning
Vision and color recognition
Language comprehension and memory
Movement coordination and balance
The Correct Answer is A
A. Decision-making, problem-solving, and planning: The frontal lobe is primarily responsible for higher-order executive functions such as reasoning, decision-making, problem-solving, judgment, and planning. It also plays a role in personality and voluntary motor control, especially through the prefrontal cortex and motor areas.
B. Vision and color recognition: These functions are associated with the occipital lobe, which is located at the back of the brain and specializes in processing visual input, including aspects like color, shape, and motion.
C. Language comprehension and memory: Language comprehension is primarily controlled by Wernicke’s area, which is located in the temporal lobe. Memory is also associated with the temporal lobe and the limbic system structures like the hippocampus.
D. Movement coordination and balance: These are functions of the cerebellum, which regulates fine motor control, coordination, balance, and posture—not the frontal lobe.
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Related Questions
Correct Answer is C
Explanation
A. Androgens (sex hormones): These are produced in the zona reticularis of the adrenal cortex. They contribute to the development of secondary sex characteristics and have a minor role compared to gonadal hormones.
B. Glucocorticoids (cortisol): Cortisol is synthesized in the zona fasciculata of the adrenal cortex. It regulates metabolism, immune responses, and the stress response, making it a key adrenal cortical hormone.
C. Epinephrine: This hormone is produced by the adrenal medulla, not the cortex. It plays a major role in the fight-or-flight response, increasing heart rate and blood glucose levels during stress.
D. Mineralocorticoids (aldosterone): Aldosterone is produced in the zona glomerulosa of the adrenal cortex. It is essential for sodium retention, potassium excretion, and blood pressure regulation.
Correct Answer is D
Explanation
A. 60–89 mL/min/1.73m²: This range indicates mildly decreased GFR, often classified as Stage 2 chronic kidney disease. Renal function is still relatively preserved and not considered renal failure at this stage.
B. 30–59 mL/min/1.73m²: This reflects a moderate decrease in GFR, typically Stage 3 CKD. Although kidney function is significantly impaired, it is not yet categorized as renal failure.
C. 15–29 mL/min/1.73m²: This GFR indicates severe kidney impairment and is classified as Stage 4 CKD. While this stage shows significant dysfunction, renal failure is generally diagnosed at lower values.
D. <15 mL/min/1.73m²: A GFR below 15 signals end-stage renal disease (ESRD), also referred to as renal failure. At this stage, dialysis or kidney transplantation is usually necessary to sustain life.
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