Q. What is the main function of the nephron in the kidneys?
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A.
Filtration of blood
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B.
Production of hormones
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C.
Storage of urine
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D.
Regulation of blood pressure
Solution
The nephron is the functional unit of the kidney responsible for the filtration of blood and formation of urine.
Correct Answer:
A
— Filtration of blood
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Q. What is the primary function of the loop of Henle in the nephron?
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A.
Concentration of urine
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B.
Filtration of blood
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C.
Secretion of waste
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D.
Reabsorption of glucose
Solution
The loop of Henle plays a crucial role in the concentration of urine by creating a concentration gradient in the medulla.
Correct Answer:
A
— Concentration of urine
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Q. What is the primary organ responsible for the elimination of urea from the body?
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A.
Liver
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B.
Kidney
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C.
Lungs
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D.
Skin
Solution
The kidneys are the primary organs responsible for filtering blood and eliminating urea through urine.
Correct Answer:
B
— Kidney
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Q. What is the role of the bladder in the excretory system?
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A.
Filtration of blood
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B.
Storage of urine
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C.
Production of urine
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D.
Regulation of electrolytes
Solution
The bladder serves as a storage organ for urine before it is expelled from the body.
Correct Answer:
B
— Storage of urine
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Q. What is the term for the process of urine formation?
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A.
Filtration
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B.
Reabsorption
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C.
Secretion
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D.
Micturition
Solution
The process of urine formation involves filtration, reabsorption, and secretion, but the term specifically refers to the initial filtration.
Correct Answer:
A
— Filtration
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Q. Which condition is characterized by the presence of excess protein in urine?
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A.
Hematuria
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B.
Proteinuria
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C.
Glycosuria
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D.
Oliguria
Solution
Proteinuria is the condition characterized by the presence of excess protein in the urine, often indicating kidney damage.
Correct Answer:
B
— Proteinuria
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Q. Which electrolyte is primarily regulated by the kidneys?
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A.
Sodium
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B.
Calcium
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C.
Potassium
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D.
All of the above
Solution
The kidneys regulate multiple electrolytes, including sodium, calcium, and potassium, maintaining homeostasis.
Correct Answer:
D
— All of the above
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Q. Which hormone regulates water reabsorption in the kidneys?
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A.
Aldosterone
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B.
Antidiuretic hormone (ADH)
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C.
Cortisol
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D.
Insulin
Solution
Antidiuretic hormone (ADH) regulates water reabsorption in the kidneys, helping to concentrate urine.
Correct Answer:
B
— Antidiuretic hormone (ADH)
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Q. Which of the following is a waste product of protein metabolism?
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A.
Glucose
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B.
Urea
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C.
Lactate
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D.
Bilirubin
Solution
Urea is a waste product formed from the breakdown of proteins in the liver and is excreted in urine.
Correct Answer:
B
— Urea
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Q. Which of the following substances is NOT typically found in urine?
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A.
Urea
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B.
Creatinine
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C.
Glucose
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D.
Uric Acid
Solution
Glucose is not typically found in urine unless there is a condition such as diabetes mellitus.
Correct Answer:
C
— Glucose
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