1. Which of the following statements is not true for freshwater fish? a. They pump solutes in through their gills. b. They lose water through the gills by osmosis. c. They produce large volumes of dilute urine. d. They lose some solutes in their urine. e. They do not drink. 2. Which of the following statements is not true for saltwater fish? a. They lose water through the gills by osmosis. b. They pump solutes out through their gills. c. They produce large amounts of dilute urine. d. The concentration of solutes in their internal fluids is much lower than in the surrounding e. They drink a lot of seawater. 3. One advantage of excreting wastes as urea rather than ammonia is that a. urea can be exchanged for Na+. b. urea does not affect the osmolregulatory gradient. c. urea is less toxic than ammonia. d. urea is less concentrated than ammonia. e. urea requires more water for excretion than ammonia. 4. Which of the following minerals is INCORRECTLY associated with its use in animals? a. sodium - important in nerve function b. phosphorous - ingredient of nucleic acids c. iron - regulation of metabolic rate d. potassium - important in nerve function e. calcium - construction and maintenance of bone
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For freshwater fish, the statement that is not true is: "They produce large volumes of dilute urine." The correct statement should be: "They produce small volumes of concentrated urine." So, the answer for question 1 is: $\boxed{\text{They produce large volumes Show moreā¦
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3. Which of the statements about the effects of alcohol is false? Alcohol consumption results in the production of a more dilute urine. Alcohol consumption can lead to dehydration. Alcohol interferes with the production of ADH. Alcohol consumption makes the walls of the collecting duct impermeable to water 5. Which of the statements is true? Ammonia is safe to cells at high concentrations. Uric acid can be stored at a higher concentration in tissues than urea. Excretion of urea requires less water than excretion of uric acid. Urea is produced and eliminated in the kidneys. Excretion of ammonia requires high volumes of water. 7. Which of the statements about nitrogenous waste excretion is correct? Ammonia is less toxic than uric acid but requires more water for excretion. Urea is less toxic than uric acid but more energetically costly to produce. Uric acid is less toxic than ammonia but more energetically costly to produce. Ammonia is more toxic than urea but requires less water for excretion. Uric acid is less toxic than urea but requires more water for excretion.
Josee P.
Which of the following statements is true of fishes that live in freshwater? a. Water moves across the gills via osmosis until equilibrium is established, at which time the water molecules stop moving. b. They lose water to their environment primarily through the gills. They replace this water by drinking. c. Water enters epithelial cells in their gills via osmosis. Electrolytes leave the same cells via diffusion. d. They have specialized epithelia that actively pump $\mathrm{Na}^{+}$ and $\mathrm{Cl}^{-}$ from the blood into their environment.
Which of the following statements apply to freshwater fish? Select one: A. They pump out ions via the gills. B. They lose water by osmosis. C. The concentration of solutes in their internal fluids is lower than in the surrounding water. D. They produce dilute urine.
Maitreya E.
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