Chapter 16: Excretory Products and Their Elimination — Online MCQ Test
BIOLOGY · CLASS 11 INTER I YEAR · Andhra State Board
Practice Chapter 16: Excretory Products and Their Elimination with a free chapter-wise online MCQ test.
This chapter covers: Kidney Nephron Urine Excretion Glomerular Filtration Tubular Reabsorption Osmoregulation Urea Renal System.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 16: Excretory Products and Their Elimination — Important Questions & Answers
Which nitrogenous waste is the main excretory product in humans?
- A. Ammonia
- B. Urea
- C. Uric acid
- D. Creatinine
Answer: B. Urea
Humans are ureotelic, so urea is the chief nitrogenous waste excreted by the body.
Humans are ureotelic, so urea is the chief nitrogenous waste excreted by the body.
The functional unit of the kidney is called the:
- A. Neuron
- B. Nephron
- C. Alveolus
- D. Hepatocyte
Answer: B. Nephron
A nephron is the structural and functional unit of the kidney responsible for urine formation.
A nephron is the structural and functional unit of the kidney responsible for urine formation.
In the nephron, maximum reabsorption of glucose, amino acids, and water occurs in the:
- A. Glomerulus
- B. Proximal convoluted tubule
- C. Loop of Henle
- D. Collecting duct
Answer: B. Proximal convoluted tubule
The proximal convoluted tubule is the major site of selective reabsorption of useful substances.
The proximal convoluted tubule is the major site of selective reabsorption of useful substances.
Which one is the correct comparison between cortical and juxtamedullary nephrons?
- A. Cortical nephrons have long loops of Henle and extend deep into medulla
- B. Juxtamedullary nephrons have short loops of Henle and no vasa recta
- C. Cortical nephrons have short loops of Henle and juxtamedullary nephrons have long loops of Henle
- D. Both types lack glomeruli
Answer: C. Cortical nephrons have short loops of Henle and juxtamedullary nephrons have long loops of Henle
Cortical nephrons usually have short loops of Henle, while juxtamedullary nephrons have long loops that help concentrate urine.
Cortical nephrons usually have short loops of Henle, while juxtamedullary nephrons have long loops that help concentrate urine.
Which of the following is the most accurate reason for the presence of urea in urine but not in blood cells?
- A. Urea is formed in kidneys and blood cells destroy it
- B. Urea is produced in liver and filtered by kidneys, while blood cells are not filtered normally
- C. Blood cells convert urea into ammonia before excretion
- D. Urea is synthesized in the bladder and absorbed by blood cells
Answer: B. Urea is produced in liver and filtered by kidneys, while blood cells are not filtered normally
Urea is produced in the liver from ammonia and is carried in blood to kidneys for excretion; blood cells remain inside blood vessels under normal conditions.
Urea is produced in the liver from ammonia and is carried in blood to kidneys for excretion; blood cells remain inside blood vessels under normal conditions.