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 B
Explanation
A. In a hypertonic solution, water moves out of the cell into the surrounding fluid, causing the cell to shrink. Therefore, the volume of the cell does not increase.
B. A hypertonic solution has a higher concentration of solutes than the inside of the red blood cell. As a result, water moves out of the cell, causing it to shrink or decrease in volume.
C. The permeability of the cell membrane is not directly affected by the tonicity of the solution. The change in cell volume is due to the movement of water, not a change in membrane permeability.
D. The permeability of the cell membrane is not typically affected by a hypertonic solution, but rather the osmotic pressure that drives water movement across the membrane. The main effect is on the cell's volume, not its membrane permeability.
Correct Answer is A
Explanation
A. The medulla oblongata, located in the brainstem, is directly responsible for controlling the rate and depth of breathing. It detects changes in blood levels of CO2 and adjusts respiratory activity accordingly.
B. The hypothalamus regulates various autonomic functions, including body temperature, hunger, and thirst, but it is not directly involved in the control of respiration.
C. The midbrain is involved in functions such as vision, hearing, and motor control, but it does not directly control respiration.
D. The cerebellum is responsible for coordinating movement and balance, but it does not regulate respiratory control.
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