Biology Forums - Study Force

The macula densa cells are chemoreceptors that respond to changes in the urea content of the filtrate.
 
  Indicate whether the statement is true or false

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(Question 2) What is the significance of the fact that monosaccharides are phosphorylated immediately upon entry into cells?
 
  What will be an ideal response

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(Question 3) If one says that the clearance value of glucose is zero, what does this mean?
 
  A) Normally all the glucose is reabsorbed.
  B) The clearance value of glucose is relatively high in a healthy adult.
  C) The glucose molecule is too large to be filtered out of the blood.
  D) Most of the glucose is filtered out of the blood and is not reabsorbed in the convoluted tubules.

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(Question 4) Which of the choices below describes the pathway of cellular respiration (the complete oxidation of glucose)?
 
  A) lipolysis, glycogenolysis, beta oxidation
  B) glycogenesis, lipogenesis, electron transport chain
  C) glycolysis, citric acid (Krebs) cycle, electron transport chain, oxidative phosphorylation
  D) gluconeogenesis, citric acid (Krebs) cycle, lipolysis

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(Question 5) How is the postabsorptive state controlled and initiated?
 
  What will be an ideal response

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(Question 6) Atrial natriuretic peptide inhibits sodium reabsorption.
 
  Indicate whether the statement is true or false

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(Question 7) It is impossible to overhydrate because people need as much water as they can drink to carry out ordinary body functions.
 
  Indicate whether the statement is true or false

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(Question 8) If the Tm for a particular amino acid is 120 mg/100 ml and the concentration of that amino acid in the blood is 230 mg/100 ml, the amino acid will ________.
 
  A) appear in the urine
  B) be completely reabsorbed by the tubule cells
  C) be actively secreted into the filtrate
  D) be completely reabsorbed by secondary active transport

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(Question 9) Minerals required by the body in moderate amounts include all of the following EXCEPT ________.
 
  A) sulfur and potassium
  B) sodium and chlorine
  C) calcium and phosphorus
  D) iron and selenium

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(Question 10) Dehydration can be caused by endocrine disturbances such as diabetes mellitus or diabetes insipidus.
 
  Indicate whether the statement is true or false

1) FALSE

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2) Monosaccharides are phosphorylated immediately upon entry into cells so that entry into metabolic pathways is possible. Additionally, phosphorylation, to change the structure of glucose, allows the maintenance of a diffusion gradient for simple glucose. Phosphorylation also prevents glucose from leaving the cell.

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3) A

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4) C

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5) The postabsorptive state is controlled by the interaction of the sympathetic nervous system and several hormones, especially glucagon. The trigger for initiating postabsorptive events is damping of insulin release, which occurs as blood glucose levels begin to drop. Insulin levels decline, and the insulin-induced cellular responses are inhibited.

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6) TRUE

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7) FALSE

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8) A

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9) D

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10) TRUE

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