What is the most abundant cation in the ICF?
K+
Ca 2+
Cl-
Na
The Correct Answer is A
A. K+: Potassium (K+) is the most abundant cation in the intracellular fluid (ICF). This is the correct answer.
B. Ca2+: Calcium (Ca2+) is not the most abundant cation in the ICF; it is found in lower concentrations within cells compared to potassium.
C. Cl-: Chloride (Cl-) is the most abundant anion in the extracellular fluid (ECF), not in the intracellular fluid.
D. Na: Sodium (Na) is the most abundant cation in the extracellular fluid (ECF), not in the intracellular fluid.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. During pubarche: Pubarche refers to the onset of puberty, but oogenesis (the formation of oocytes) begins much earlier, during embryonic development.
B. During embryonic development: Oogenesis begins during embryonic development when the female fetus's ovaries form and start producing primary oocytes. These oocytes remain in a suspended state until puberty.
C. During thelarche: Thelarche is the onset of breast development during puberty, but oogenesis starts long before this, during embryonic development.
D. At birth: While primary oocytes are present at birth, the process of oogenesis actually begins during embryonic development, not at birth.
Correct Answer is B
Explanation
A. Renal filtrate refers to the fluid filtered from the blood in the glomerulus, which is the initial stage of urine formation. It does not immediately precede urine.
B. Tubular fluid is the filtrate as it passes through the nephron tubules, undergoing various processes like reabsorption and secretion. This fluid eventually becomes urine, after the final adjustments in the collecting duct.
C. Plasma is the liquid component of blood that is filtered by the glomerulus, but it is not the direct precursor to urine.
D. Glomerular filtrate is the fluid filtered out of the blood in the glomerulus and is the precursor to tubular fluid, not directly to urine.
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