Worksheet: Osmoregulation

In this worksheet, we will practice describing the function of the kidney in osmoregulation and creation of urine.

Q1:

Which organ is responsible for the production of urea?

  • AThe heart
  • BThe small intestine
  • CThe liver
  • DThe stomach
  • EThe kidneys

Q2:

Which of the following best describes osmoregulation?

  • AOsmoregulation is the control of the concentration of oxygen in the body and the concentration of carbon dioxide in the blood.
  • BOsmoregulation is the regulation of the volume of water that travels by osmosis in a plant or an animal cell.
  • COsmoregulation is the control of the amount of water in the body and the mineral ion concentration in the blood.
  • DOsmoregulation is the control of the concentration of hormones in the body and the volume of glucose in the blood.

Q3:

Which of the following statements best describes how ADH helps regulate water balance?

  • AIf present, ADH increases the permeability of the collecting duct, so more water is excreted in urine.
  • BIf present, ADH decreases the permeability of the collecting duct, so more water is excreted in urine.
  • CIf present, ADH increases the permeability of the collecting duct, so more water is reabsorbed into the bloodstream.
  • DIf present, ADH increases the permeability of the collecting duct, so there are higher concentrations of glucose reabsorbed into the blood.
  • EADH has no effect on the regulation of water balance in the body.

Q4:

Antidiuretic hormone (ADH) is a hormone involved in regulating the body’s water balance. Which endocrine gland releases ADH into the bloodstream?

  • AOvaries
  • BPituitary
  • CThyroid
  • DAdrenal
  • EPancreas

Q5:

Complete the sentence: As the intensity of exercise increases, the volume of urine because of the body’s water is lost as sweat.

  • Adecreases, more
  • Bdoubles, half
  • Cincreases, less
  • Dincreases, more

Q6:

The diagram provided shows a collecting duct in the kidney in two scenarios: one where water is being reabsorbed in the bloodstream and one where it is not.

In which scenario (A, B, or both) would the most ADH be present?

  • AB
  • BA
  • CBoth

In which scenario (A, B, or both) would the person be well hydrated?

  • AB
  • BA
  • CBoth

Q7:

The diagram provided shows a flowchart outlining how hormones are involved in osmoregulation.

Which hormone is represented by the letter A?

  • AADH
  • BTestosterone
  • CAdrenaline
  • DInsulin

Which process is represented by the letter B?

  • ARespiration
  • BFiltration
  • CReabsorption
  • DDistillation

What key word could replace the letter C?

  • ADiluted
  • BReduced
  • CDistilled
  • DConcentrated

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