In the nephron, the fluid that immediately precedes urine is known as:
renal filtrate
tubular fluid
plasma
glomerular filtrate
The Correct Answer is B
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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Correct Answer is D
Explanation
A. Minerals are absorbed directly into the bloodstream, not through lacteals.
B. Glucose is absorbed directly into the bloodstream through capillaries, not through lacteals.
C. Amino acids are absorbed into the bloodstream through capillaries, not through lacteals.
D. Triglycerides are absorbed by the lacteals in the small intestine. Lacteals are lymphatic vessels that transport absorbed lipids (including triglycerides) from the digestive tract.
Correct Answer is C
Explanation
A. The small intestine absorbs lipids but does not produce HDL (high-density lipoprotein).
B. The pancreas produces enzymes and hormones, but it does not produce HDL.
C. The liver is the primary organ responsible for the synthesis of HDL. HDL is involved in reverse cholesterol transport, carrying cholesterol from tissues back to the liver.
D. The gallbladder stores and concentrates bile but does not produce HDL.