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.
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Correct Answer is C
Explanation
A. Lactateis produced during anaerobic metabolism (when oxygen is scarce) as a byproduct of glycolysis, but it is not the direct product of glycolysis itself.
B. Carbon dioxideis a byproduct of cellular respiration, specifically during the Krebs cycle, not glycolysis.
C. Pyruvateis the end product of glycolysis, where glucose is broken down into two molecules of pyruvate.
D. Acetyl-CoAis formed from pyruvate during the transition step before the Krebs cycle, not directly from glycolysis.
Correct Answer is D
Explanation
A. To the lining of the uterine tube: If an embryo attaches to the uterine tube, it results in an ectopic pregnancy, which is not typical or safe.
B. To the myometrium: The myometrium is the muscular layer of the uterus and is not the usual site of embryo attachment.
C. To the perimetrium: The perimetrium is the outermost layer of the uterus and is not involved in embryo implantation. This is incorrect.
D. To the endometrium: The endometrium is the inner lining of the uterus, where the embryo typically implants and attaches. This is the correct answer.