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Which of the following sequences correctly represents the flow of urine from its formation to its elimination from the body?

A.

Calyx, nephron, collecting duct, urinary bladder, renal pelvis, ureter, urethra

B.

Nephron, collecting duct, calyx, renal pelvis, ureter, urinary bladder, urethra

C.

Nephron, renal pelvis, collecting duct, calyx, urinary bladder, urethra, ureter

D.

Collecting duct, nephron, renal pelvis, calyx, urinary bladder, ureter, urethra

Answer and Explanation

The Correct Answer is B

A. Calyx, nephron, collecting duct, urinary bladder, renal pelvis, ureter, urethra:   Sequence is wrong -filtrate is formed in nephron, flows into collecting duct, then into calyx → renal pelvis → ureter → bladder → urethra.
B. Nephron, collecting duct, calyx, renal pelvis, ureter, urinary bladder, urethra:   Urine forms in nephron → drains into collecting duct → minor/major calyces → renal pelvis → ureter → urinary bladder → urethra for elimination.
C. Nephron, renal pelvis, collecting duct, calyx, urinary bladder, urethra, ureter:   Renal pelvis and calyx order is swapped relative to collecting duct; ureter/bladder order is wrong.
D. Collecting duct, nephron, renal pelvis, calyx, urinary bladder, ureter, urethra:   Collecting duct follows the nephron (not precedes it); calyx and pelvis ordering is


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Related Questions

Correct Answer is B

Explanation

A. Eupnea:Eupnea means normal, unlabored breathing (normal respiratory rate and depth) -not difficult breathing.
B. Dyspnea: Dyspnea describes difficult or labored breathing (shortness of breath).
C. Hyperpnea: Hyperpnea means increased depth and/or rate of breathing (e.g., during exercise), not necessarily “difficult” or labored breathing.
D. Apnea: Apnea means a temporary absence of breathing (no breathing), the opposite of labored breathing.

Correct Answer is C

Explanation

A. Uterus: The uterus is an internal reproductive organ (the womb) and does not include the labia.
B. Fallopian tube: Fallopian (uterine) tubes are internal conduits for the oocyte; they are not the labia.
C. Vulva:The vulva is the external female genitalia and includes the labia majora and labia minora .
D. Ovary: The ovaries are internal gonads that produce oocytes and hormones; they are not the labia.

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