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4 votes
Adding NaCl alone:

what happens to...
a. ECF
b. RAAS
c. ANP/BNP
d. Carotid stim
e. urine sodium excretion
f. ADH
g. thirst
h. uOSM
i. water intake

User Csander
by
8.1k points

1 Answer

6 votes

Final answer:

Adding NaCl to the body increases ECF volume and blood pressure, suppresses RAAS and ADH, enhances ANP/BNP secretion, dampens thirst, reduces water intake, and results in more dilute urine with increased sodium excretion.

Step-by-step explanation:

When NaCl is added to the body, a series of physiological responses occur:

  • a. Extracellular Fluid (ECF) volume increases, leading to higher blood pressure.
  • b. Renin-Angiotensin-Aldosterone System (RAAS) is downregulated due to increased blood pressure and volume.
  • c. Atrial Natriuretic Peptide (ANP)/Brain Natriuretic Peptide (BNP) levels increase to promote salt and water excretion and decrease blood pressure.
  • d. Carotid Sinus baroreceptors detect increased blood pressure, leading to a decrease in sympathetic outflow and lowered heart rate.
  • e. Urine Sodium Excretion is promoted by increased ANP/BNP and decreased RAAS activity.
  • f. Antidiuretic Hormone (ADH) secretion is suppressed due to adequate hydration, leading to a decrease in water reabsorption.
  • g. Thirst sensation is attenuated as the body is in a state of volume expansion.
  • h. Urinary Osmolality (uOSM) decreases as less ADH is present, resulting in more dilute urine.
  • i. Water intake is decreased due to reduced thirst and adequate ECF volume.

User Mkarrfan
by
8.3k points
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