In an Experiment, 3 L of Isotonic Saline Are Infused

question 251

Multiple Choice

In an experiment, 3 L of isotonic saline are infused intravenously into a healthy volunteer after multiple baseline physiologic parameters are recorded.  Serial blood pressure measurements show an increase in the systolic and diastolic blood pressure.  Ultrasonography reveals an increase in the left ventricular volume and engorgement of the inferior vena cava.  Blood levels of a peptide hormone have also increased compared to baseline.  This hormone is most likely to increase which of the following in this test subject?

• A)Acid content of the urine
• B)Glomerular filtration rate
• C)Renal sodium reabsorption
• D)Renal water reabsorption
• E)Vascular resistance

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Definitions:

Absolute Differences

The minimum amount by which two sensory stimuli can differ for an individual to perceive them as different.

Gustav Fechner

A German philosopher, physicist, and experimental psychologist who founded psychophysics, studying the relationship between the physical properties of stimuli and the sensations they produce.

Psychological Sensation

The subjective experience or perception of a stimulus through the mind's interpretation of sensory information.

Physical Stimulus

A tangible or material factor that can prompt a physical reaction in an organism.