Punjab 12th Class Biology Chapter 15 Homeostasis Mcqs Test Online

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Biology

1. The site and principal mechanism for the passage of glucose into the blood stream in the human kidney is the:

1.Glomerulus, by ultrafiltration

2.Collecting duct, by active secretion

3.Proximal convoluted tubule, by selective reabsorption

4.Glomerulus, by selective reabsorption

2. The water content of human blood is regulated by ADH. In which part of the nephron does regulation occur?

1.Descending limb of loop of Henle

2.Ascending limb of loop of Henle

3.Proximal convoluted tubule

4.Bowmen’s Capsule

3. The main difference between endotherms and ectotherms is:

1.Whether they live on land or in the water

2.How they conserve water

3.Where from they get most of their body heat

4.Whether they are warm or cold blooded

4. The function of glomerulus and Bowmen’s Capsule of the nephron is to:

1.Filter the blood and capture the filtrate

2.Eliminate ammonia from the body

3.Reabsorb water into the blood

4.Reabsorb slats and amino acids

5. The walls of the ____________ are made more or less permeable to water, depending on the need to conserve water:

1.Ureter

2.Urethra

3.Collecting duct

4.Fibrous capsule

6. Which of the following will cause a decrease in ADH production?

1.Dehydration

2.An increase in osmotic pressure of blood

3.Drinking water

4.Abnormally low blood pressure

7. A drug reduces mitochondrial activity in kidney nephrons. Which chemical will be present in increased amounts in the urine?

1.Uric acid

2.Glucose

3.Ammonia

4.Urea

8. Excretion of hypotonic urine in humans is associated best with the:

1.Proximal convoluted tubule

2.Loop of the Henle

3.Distal convoluted tubule

4.Glomerular capsule

9. In man, glucose is present in blood plasma but not in urine. This is because glucose molecules are:

1.Too large to enter Bowmen’s Capsule

2.Stored in the kidney

3.Oxidized to supply energy for ultra filtration

4.Actively transported from the proximal convoluted tubule to blood capillaries

10. Evidence for glomerular filtration in the kidney could be obtained by comparing the sizes of the molecules present in Bowmen’s Capsule with those in the:

1.Loop of Henle

2.Afferent blood vessel

3.Proximal tubule

4.Collecting duct

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