Which of the following is an early symptom of dehydration?
Increased pulse
Poor skin turgor
Decreased urinary output
Thirst
The Correct Answer is D
A. An increased pulse is a later symptom of dehydration, as the body attempts to maintain blood pressure and circulation when fluid levels are low.
B. Poor skin turgor is a sign of more advanced dehydration and is usually detected when skin remains tented after being pinched.
C. Decreased urinary output typically occurs as dehydration progresses and the body conserves water, but it is not usually the first sign.
D. Thirst is one of the earliest and most common symptoms of dehydration, as the body signals the need for water intake to restore fluid balance. This is the correct answer.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. The production of breast milk is the function of the mammary glands, not the lacrimal gland.
B. The production of saliva is the function of the salivary glands, not the lacrimal gland.
C. The secretion of cerumen (earwax) is the function of the ceruminous glands, not the lacrimal gland.
D. The lacrimal glands are responsible for the secretion of tears, which help to lubricate and protect the surface of the eyes. This is the correct answer.
Correct Answer is A
Explanation
A. Calcium plays a critical role in blood clotting. It is involved in the coagulation cascade and is necessary for the activation of clotting factors that help stop bleeding.
B. Calcium is not involved in acid buffering. This function is primarily carried out by buffers such as bicarbonate in the blood.
C. While calcium does help regulate some functions of cells and tissues, it does not primarily contribute to extracellular osmotic pressure; this is more a function of proteins and other ions.
D. ATP production mainly occurs in mitochondria and is driven by the metabolism of glucose and fatty acids, not by calcium directly. Calcium does, however, play a role in cellular processes like muscle contraction.
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