Question 1

The major function of the protonephridia in the flatworm is to

Accepted Answer

A)  conserve water. 
B)  conserve salts. 
C)  eliminate waste materials such as ammonia and urea. 
D)  eliminate excess water. 
E)  regulate the pH of the gastrovascular cavity. 
A)  conserve water. 
B)  conserve salts. 
C)  eliminate waste materials such as ammonia and urea. 
D)  eliminate excess water. 
E)  regulate the pH of the gastrovascular cavity.

Question 2

Figure 48-1 ​
 
​
Which structure in the accompanying figure represents the nitrogenous waste urea?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 3

Podocytes are located in the wall of

Accepted Answer

A)  the Bowman's capsule. 
B)  the glomerulus. 
C)  the peritubular capillaries. 
D)  the renal artery. 
E)  the proximal convoluted tubule. 
A)  the Bowman's capsule. 
B)  the glomerulus. 
C)  the peritubular capillaries. 
D)  the renal artery. 
E)  the proximal convoluted tubule.

Question 4

The efferent arterioles transport blood directly into the

Accepted Answer

A)  afferent arterioles. 
B)  Bowman's capsule. 
C)  glomerulus. 
D)  peritubular capillaries. 
E)  renal artery. 
A)  afferent arterioles. 
B)  Bowman's capsule. 
C)  glomerulus. 
D)  peritubular capillaries. 
E)  renal artery.

Question 5

Match between columns
                        Premises: compounds that form ions in solution

Accepted Answer

The Answer of osmoregulation and osmolarity and osmoregulators and electrolytes is...

Question 6

Most reabsorption occurs in the distal convoluted tubule.

Accepted Answer

A) True 
 B)False

Question 7

Match between columns
                        Premises: animals whose body fluid concentration varies along with changes in sea water

Accepted Answer

The Answer of osmoregulation and interstitial fluid and osmoregulators and is...

Question 8

Match between columns
                        Premises: lancelets

Accepted Answer

The Answer of nephridia and metanephridia and Malpighian tubules and is...

Question 9

Match between columns
                        Premises: insoluble in water; excreted as crystalline paste

Accepted Answer

The Answer of urea and uric acid and ammonia is...

Question 10

Which statement is accurate of filtration by the kidneys?

Accepted Answer

A)  About 25% of the plasma passing through the glomerulus becomes part of the glomerular filtrate. 
B)  Solutes dissolved in the plasma such as HDL and globular proteins become part of the filtrate. 
C)  The normal glomerular filtration rate adds up to about 180 L every 24 hours. 
D)  Approximately 75% of the filtrate is reabsorbed into the blood through the renal tubules. 
E)  The filtration membrane prevents the passage of cells, but allows large molecules to pass through. 
A)  About 25% of the plasma passing through the glomerulus becomes part of the glomerular filtrate. 
B)  Solutes dissolved in the plasma such as HDL and globular proteins become part of the filtrate. 
C)  The normal glomerular filtration rate adds up to about 180 L every 24 hours. 
D)  Approximately 75% of the filtrate is reabsorbed into the blood through the renal tubules. 
E)  The filtration membrane prevents the passage of cells, but allows large molecules to pass through.

Question 11

The main difference between protonephridia and metanephridia is that

Accepted Answer

A)  protonephridia are involved in osmoregulation, whereas metanephridia are involved in excretion. 
B)  protonephridia consist of blind flame cells, whereas metanephridia consist of tubules open at both ends. 
C)  protonephridia are involved in excretion, whereas metanephridia are involved in osmoregulation. 
D)  protonephridia consist of tubules open at both ends, whereas metanephridia consist of blind flame cells. 
E)  protonephridia are found in annelids and metanephridia are found in flatworms. 
A)  protonephridia are involved in osmoregulation, whereas metanephridia are involved in excretion. 
B)  protonephridia consist of blind flame cells, whereas metanephridia consist of tubules open at both ends. 
C)  protonephridia are involved in excretion, whereas metanephridia are involved in osmoregulation. 
D)  protonephridia consist of tubules open at both ends, whereas metanephridia consist of blind flame cells. 
E)  protonephridia are found in annelids and metanephridia are found in flatworms.

Exam 48: Osmoregulation and Disposal of Metabolic Wastes

The major function of the protonephridia in the flatworm is to

Figure 48-1 ​ ​ Which structure in the accompanying figure represents the nitrogenous waste urea?

Podocytes are located in the wall of

The efferent arterioles transport blood directly into the

Most reabsorption occurs in the distal convoluted tubule.

Which statement is accurate of filtration by the kidneys?

The main difference between protonephridia and metanephridia is that

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Figure 48-1 Which structure in the accompanying figure represents the nitrogenous waste urea?