Excretory Products and Their Elimination Chapter-Wise Test 8

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which statement about renal circulation is incorrect?

The afferent arteriole carries blood into the glomerulus.
The efferent arteriole carries blood away from the glomerulus.
The renal vein carries oxygenated blood from the kidney.
Peritubular capillaries are involved in reabsorption.
3

The renal vein carries deoxygenated but filtered blood away from the kidney, not oxygenated blood.

Which statement about the renal threshold of glucose is incorrect?

The renal threshold for glucose is around 180 mg/dL.
If blood glucose levels exceed the renal threshold, glucose appears in urine.
All individuals have the same renal threshold for glucose.
Below the renal threshold, all glucose is reabsorbed in the nephron.
3

The renal threshold for glucose can vary among individuals depending on physiological conditions.

Which of the following structures in the kidney is responsible for regulating glomerular filtration rate (GFR)?

Proximal convoluted tubule
Loop of Henle
Juxtaglomerular apparatus (JGA)
Collecting duct
3

The juxtaglomerular apparatus (JGA) regulates GFR by releasing renin, which activates the renin-angiotensin system to control blood pressure.

Which of the following statements regarding excretion in humans is incorrect?

The kidney excretes nitrogenous waste.
Lungs help in excreting carbon dioxide.
The liver excretes bilirubin.
Skin plays no role in excretion.
4

Skin plays a role in excretion by eliminating small amounts of urea and salts through sweat.

Which of the following statements about renal circulation is correct?

Blood enters the glomerulus through the efferent arteriole.
The renal vein carries deoxygenated but filtered blood from the kidney.
The afferent arteriole carries blood away from the nephron.
Glomerular filtration occurs in the collecting duct.
2

The renal vein carries deoxygenated but filtered blood away from the kidney.

Which of the following statements about renal circulation is correct?

The afferent arteriole carries blood to the glomerulus.
The efferent arteriole carries blood to the heart.
The renal vein supplies blood to the nephron.
The peritubular capillaries are part of the lymphatic system.
1

The afferent arteriole carries blood into the glomerulus for filtration.

Which of the following statements about the renin-angiotensin system is correct?

Renin is released in response to high blood pressure.
Renin activates angiotensinogen into angiotensin I.
Angiotensin II decreases blood pressure by dilating blood vessels.
Aldosterone reduces sodium reabsorption in the kidney.
2

Renin converts angiotensinogen into angiotensin I, which is then converted to angiotensin II, helping to increase blood pressure.

Which of the following excretory structures is found in Platyhelminthes?

Nephridia
Malpighian tubules
Flame cells
Green glands
3

Flame cells function as the excretory organs in Platyhelminthes, playing a role in osmoregulation and waste removal.

What is the function of atrial natriuretic factor (ANF)?

Increase sodium retention
Reduce blood pressure
Stimulate renin secretion
Increase water reabsorption
2

ANF reduces blood pressure by promoting sodium excretion and inhibiting the renin-angiotensin system.

Which of the following statements about urine formation is correct?

Filtration occurs in the proximal convoluted tubule
Reabsorption occurs only in the distal convoluted tubule
Secretion occurs in the collecting duct
Filtration occurs in the glomerulus
4

Filtration occurs in the glomerulus, where blood plasma is filtered into the Bowman’s capsule.

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