UNIT – II: Digestive & Excretory Systems
| Section | Topics Covered |
|---|---|
| Digestive System |
|
| Excretory System |
|
UNIT – I Skeletal System and Joints Question of
Good Try! good effort।
You out of You have corrected the question!
You have scored points ।
A. Stomach
B. Esophagus
C. Small intestine
D. Mouth
Correct Answer: D. Mouth
Explanation: The mouth is the entry point of the GI tract where mechanical and chemical digestion begins.
MCQ 2: What is the function of the esophagus?
A. Absorption of nutrients
B. Digestion of fats
C. Transport of food to the stomach
D. Secretion of enzymes
Correct Answer: C. Transport of food to the stomach
Explanation: The esophagus is a muscular tube that propels food from the mouth to the stomach via peristalsis.
MCQ 3: Which of the following organs secretes bile?
A. Stomach
B. Liver
C. Pancreas
D. Gall bladder
Correct Answer: B. Liver
Explanation: The liver produces bile, which aids in the digestion and absorption of fats.
MCQ 4: Which part of the small intestine is responsible for most nutrient absorption?
A. Duodenum
B. Jejunum
C. Ileum
D. Cecum
Correct Answer: B. Jejunum
Explanation: The jejunum has a highly folded surface area with villi and microvilli to maximize absorption of nutrients.
MCQ 5: What is the primary role of the large intestine?
A. Protein digestion
B. Fat absorption
C. Water and electrolyte absorption
D. Enzyme secretion
Correct Answer: C. Water and electrolyte absorption
Explanation: The large intestine absorbs water and electrolytes and compacts fecal material.
MCQ 6: Which enzyme breaks down starch into maltose?
A. Lipase
B. Pepsin
C. Amylase
D. Trypsin
Correct Answer: C. Amylase
Explanation: Amylase, found in saliva and pancreatic juice, digests starch into maltose.
MCQ 7: What is the main function of the gall bladder?
A. Produces insulin
B. Filters toxins
C. Stores and concentrates bile
D. Produces digestive enzymes
Correct Answer: C. Stores and concentrates bile
Explanation: The gall bladder stores bile from the liver and releases it into the duodenum during digestion.
MCQ 8: Which organ secretes digestive enzymes into the small intestine?
A. Liver
B. Stomach
C. Pancreas
D. Esophagus
Correct Answer: C. Pancreas
Explanation: The pancreas secretes digestive enzymes into the duodenum that aid in digestion of carbohydrates, proteins, and fats.
MCQ 9: Which digestive enzyme is secreted by the stomach?
A. Pepsin
B. Lipase
C. Trypsin
D. Amylase
Correct Answer: A. Pepsin
Explanation: Pepsin is a proteolytic enzyme secreted in the stomach that digests proteins.
MCQ 10: Which structure prevents food from entering the windpipe?
A. Uvula
B. Epiglottis
C. Pharynx
D. Larynx
Correct Answer: B. Epiglottis
Explanation: The epiglottis is a flap that closes over the trachea during swallowing to prevent food from entering the airway.
MCQ 11: What is the primary structural and functional unit of the kidney?
A. Glomerulus
B. Nephron
C. Ureter
D. Renal pelvis
Correct Answer: B. Nephron
Explanation: The nephron is the microscopic structure in the kidney that filters blood and forms urine.
MCQ 12: Where does glomerular filtration occur?
A. Proximal tubule
B. Loop of Henle
C. Glomerulus
D. Collecting duct
Correct Answer: C. Glomerulus
Explanation: Glomerular filtration takes place in the glomerulus, where blood plasma is filtered into the Bowman's capsule.
MCQ 13: Which part of the nephron reabsorbs the majority of filtered nutrients and water?
A. Collecting duct
B. Distal tubule
C. Proximal convoluted tubule
D. Loop of Henle
Correct Answer: C. Proximal convoluted tubule
Explanation: Most reabsorption of water, glucose, and electrolytes occurs in the proximal convoluted tubule.
MCQ 14: What is the function of the Loop of Henle?
A. Filtration of blood
B. Secretion of urine
C. Concentration of urine
D. Bile formation
Correct Answer: C. Concentration of urine
Explanation: The Loop of Henle creates a concentration gradient in the medulla to enable water reabsorption and urine concentration.
MCQ 15: Which hormone increases water reabsorption in the kidneys?
A. Aldosterone
B. Insulin
C. Antidiuretic hormone (ADH)
D. Cortisol
Correct Answer: C. Antidiuretic hormone (ADH)
Explanation: ADH increases water reabsorption in the collecting ducts, reducing urine output.
MCQ 16: What is the primary waste product excreted in urine?
A. Glucose
B. Urea
C. Creatine
D. Bile
Correct Answer: B. Urea
Explanation: Urea is the main nitrogenous waste product formed from protein metabolism and excreted in urine.
MCQ 17: Which vessel brings blood into the glomerulus for filtration?
A. Renal vein
B. Efferent arteriole
C. Afferent arteriole
D. Ureter
Correct Answer: C. Afferent arteriole
Explanation: The afferent arteriole brings blood to the glomerulus where filtration begins.
MCQ 18: Which of the following is NOT part of the excretory system?
A. Ureter
B. Bladder
C. Large intestine
D. Urethra
Correct Answer: C. Large intestine
Explanation: The large intestine belongs to the digestive system and is not involved in urine formation or excretion.
MCQ 19: Where is urine stored before excretion?
A. Kidney
B. Ureter
C. Bladder
D. Urethra
Correct Answer: C. Bladder
Explanation: The urinary bladder temporarily stores urine before it is excreted through the urethra.
MCQ 20: What is the function of the urethra?
A. Produces urine
B. Transports urine from kidneys
C. Stores urine
D. Conducts urine outside the body
Correct Answer: D. Conducts urine outside the body
Explanation: The urethra is a tube that transports urine from the bladder to the outside of the body during urination.
No comments:
Post a Comment