Osmoregulation in Organisms
Biology ⇒ Biological Systems and Homeostasis
Osmoregulation in Organisms starts at 9 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Osmoregulation in Organisms.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 10
A freshwater protozoan is placed in a saltwater solution. Predict what will happen to the protozoan and explain why.
A marine fish is transferred to freshwater. Predict and explain what will happen to its cells.
A person is lost in a desert and does not drink water for two days. What changes would you expect in their urine output and why?
Describe how stomata help plants in osmoregulation.
Describe the difference between osmoconformers and osmoregulators, giving one example of each.
A freshwater protozoan is placed in a saltwater solution. Predict what will happen to the protozoan and explain why.
A marine fish is transferred to freshwater. Predict and explain what will happen to its cells.
A person is lost in a desert and does not drink water for two days. What changes would you expect in their urine output and why?
Which of the following best describes a hypertonic solution? (1) Higher solute concentration than the cell (2) Lower solute concentration than the cell (3) Equal solute concentration as the cell (4) No solute present
Which of the following is a function of antidiuretic hormone (ADH)? (1) Increases urine output (2) Decreases water reabsorption (3) Increases water reabsorption (4) Stimulates thirst only
Which of the following is a key difference between osmoregulators and osmoconformers? (1) Osmoregulators change their internal environment to match the external environment (2) Osmoconformers maintain a constant internal environment (3) Osmoregulators actively control internal osmolarity (4) Osmoconformers excrete large amounts of urine
Which of the following is a major adaptation for osmoregulation in desert mammals? (1) Short loop of Henle (2) Production of dilute urine (3) Nocturnal behavior (4) Thin skin
Fill in the blank: Insects reduce water loss by having a ________ exoskeleton.
Fill in the blank: The hormone ________ regulates water reabsorption in the kidneys.
Fill in the blank: The hormone that stimulates the kidneys to reabsorb sodium and water is called ________.
Fill in the blank: The main nitrogenous waste excreted by fish is ________.
True or False: Marine fish tend to lose water to their environment by osmosis.
True or False: Osmoconformers adjust their internal osmotic concentration to match their environment.
True or False: Osmoregulators maintain a constant internal osmotic concentration regardless of the environment.
True or False: Plants use stomata to help regulate water loss.
