Multiple Choice
A major stimulus for the release of antidiuretic hormone is __________.
26. Fluid and Electrolyte Balance, Acid Base Balance
Electrolyte Balance
Struggling with Anatomy & Physiology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
The only cation exerting significant osmotic pressure in the ECF is __________.
A
Ca2+
B
K+
C
Fe2+
D
Mg2+
E
Na+
Verified step by step guidance1
Understand that the extracellular fluid (ECF) is the fluid outside of cells, which includes interstitial fluid and blood plasma.
Recognize that osmotic pressure is the pressure required to prevent the flow of water across a semipermeable membrane, and it is influenced by the concentration of solutes.
Identify that cations are positively charged ions, and in the context of the ECF, the most abundant cation will exert the most significant osmotic pressure.
Consider the common cations present in the ECF: calcium (Ca2+), potassium (K+), iron (Fe2+), magnesium (Mg2+), and sodium (Na+).
Recall that sodium (Na+) is the most abundant cation in the ECF and plays a crucial role in maintaining osmotic balance and fluid distribution, making it the primary cation exerting significant osmotic pressure in the ECF.
Related Videos
Related Practice
Electrolyte Balance practice set
Problem sets built by lead tutorsExpert video explanations