Which of the following is not true regarding the uterus?

A. fructose; seminal glands: The seminal vesicles (seminal glands) secrete a viscous fluid that contains high concentrations of fructose. This monosaccharide serves as the primary glycolytic fuel for the mitochondria in the sperm midpiece to produce ATP. This energy is essential for the flagellar lashing required for motility.

B. fructose; prostate gland: While the prostate contributes citrate and enzymes to the semen, it is not the primary source of the sugar used for sperm energetics. The prostatic fluid is slightly acidic and focuses more on the activation of sperm and the liquefaction of the coagulum. Fructose production is localized to the seminal vesicles.

C. glucose; bulbourethral glands: The bulbourethral glands primarily secrete a clear mucus that serves to lubricate the urethra and neutralize acidic urine. They do not produce significant quantities of simple sugars like glucose or fructose for sperm nutrition. Their contribution is protective and preparatory rather than nutritive.

D. glucose; seminal glands: Although glucose is the common metabolic sugar in the blood, the seminal glands specifically synthesize and secrete fructose. Fructose is preferred in the seminal environment and is the standard marker used in clinical labs to verify the secretory function of the seminal vesicles. Glucose is not the primary seminal sugar.

E. fructose; seminiferous gland: There is no anatomical structure officially termed a "seminiferous gland." The seminiferous tubules are the site of sperm production, but the fluid they produce is minimal and lacks the concentrated nutrient load found in the secretions of the accessory glands. Fructose is added later in the ductal system.

A. K+: Potassium is the most abundant intracellular cation and is crucial for maintaining the resting membrane potential of excitable tissues. While it determines the volume of the intracellular fluid, it does not dominate the overall distribution of water between the major fluid compartments. Its levels are tightly regulated.

B. Na+: Sodium is the most abundant cation in the extracellular fluid and accounts for approximately 90 percent of its osmotic pressure. Because water follows solutes, the total body sodium content is the primary determinant of extracellular fluid volume. It is the "osmotic magnet" for water distribution.

C. Mg+2: Magnesium is primarily an intracellular cation that serves as a cofactor for numerous enzymatic reactions. Its concentration in the extracellular fluid is relatively low compared to sodium or chloride. It does not exert a significant osmotic pull on the total volume of body water.

D. Cl-: Chloride is the most prevalent extracellular anion and often follows sodium to maintain electrical neutrality. While it contributes to osmotic pressure, its movement is generally secondary to the active transport of sodium. Sodium remains the primary driver of the osmotic gradients that move water.

E. Ca+2: Calcium ions are essential for blood clotting, neurotransmitter release, and muscle contraction. Extracellular calcium levels are kept within a very narrow range and are too low to significantly influence the total osmotic pressure of the plasma. It is not a major factor in fluid distribution.