A person who has a frontal-lobe brain injury is likely to experience a deficit in which of the following?
Emotional stability
Speech comprehension
Vision
Swallowing
The Correct Answer is A
A. The frontal lobe is responsible for higher cognitive functions, including emotional regulation, problem-solving, decision-making, and controlling emotional responses. A frontal-lobe injury can impair emotional stability, making it difficult for the individual to manage emotions appropriately. This is the correct answer.
B. Speech comprehension is primarily associated with the temporal lobe, particularly in areas like Wernicke’s area, not the frontal lobe.
C. Vision is processed in the occipital lobe, so a frontal-lobe injury would not typically affect vision.
D. Swallowing involves motor control that is often linked to the brainstem, not the frontal lobe.
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Related Questions
Correct Answer is D
Explanation
A. The stomach plays a key role in digestion by breaking down food mechanically and chemically but does not play a significant role in nutrient absorption.
B. The large intestine is primarily involved in water and electrolyte absorption, as well as the formation of feces. It does not significantly contribute to nutrient absorption.
C. While some digestion begins in the mouth, particularly with enzymes in saliva, nutrient absorption does not occur there.
D. The small intestine is the primary site of nutrient absorption in the digestive system. Its walls are lined with villi and microvilli that increase surface area for the absorption of nutrients such as carbohydrates, proteins, fats, vitamins, and minerals.
Correct Answer is A
Explanation
A. After passing through the proximal convoluted tubule, the filtrate enters the Loop of Henle, where further reabsorption of water and solutes occurs. This is the next step in the nephron's sequence.
B. The collecting duct comes much later in the nephron pathway, receiving filtrate after the distal convoluted tubule. It is not the immediate successor to the proximal convoluted tubule.
C. The glomerulus is the site where blood filtration begins, preceding the proximal convoluted tubule, so the filtrate does not return here.
D. Bowman's capsule collects the initial filtrate from the glomerulus before it enters the proximal convoluted tubule, making it an earlier step in the nephron process.
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