Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
4th Edition
ISBN: 9781319154639
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Chapter 21, Problem 11SA
Summary Introduction
To analyze:
Whether invertebrate osmoconformers living in salt water have set points for solute concentrations in their body, and the reason for the above.
Introduction:
Osmoconformers let the environment determine the concentration of their body fluids.
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If a Paramecium was to swim from a hypotonic environment to an isotonic one, what will change in the activity of its contractile? vacuole
Some animals are osmoconformers, meaning that they maintain the tonicity/osmolarity of their body fluids equal to that of the external environment. Hydroids, a type of cnidarian, are osmoconformers. But they don't move and thus are adapted to the environment they live in. A) What would happen if you take a marine hydroid and transfer it into a freshwater aquarium? B) What would happen if you take a freshwater hydroid and transfer it into a saltwater aquarium? C) Sharks are extraordinary osmoconformers. Bull sharks store urea in their tissues and use it to match the tonicity of their tissues to that of the surrounding environment. Some sharks can move from saltwater to freshwater, hypothesize what changes will sharks do in order to adjust when moving from saltwater to freshwater and vice versa. Explain your answer in terms of tonicity and specify the direction of water movement and urea concentration.
How does a lizard control it's membrane fluidity at high temperature?
Chapter 21 Solutions
Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
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- Most marine invertebrates are osmotic conformers. How does their body fluid differ from that of sharks and rays, which are also in near osmotic equilibrium with their environment?arrow_forwardIf a culture of Paramecium caudatum had NaCl added to modify extracellular solute concentration, how would the cell react to different solute concentrations what effect does it have osmoregulation? What observation would we expect to see under the microscope?arrow_forwardHow do cellular osmosis takes place from interstitial fluid to the vacuole and vice versa? please help asaparrow_forward
- Define osmosis; characterize isotonic, hypertonic and hypotonic solutions and what happens to cells, osmotically in each of these environments. State which tonicity is optimal for animal cells and why.arrow_forwardWhich of the following is an osmoconformer? O A marine invertebrate who lives in water of a constant temperature O A lizard who shuttles back and forth into the sun to maintain a constant temperature throughout the day O No answer text provided. O A mammal who maintains a constant body temperature metabolically throughout the day.arrow_forwardWhat condition do animal cells prefer (hypotonic/isotonic/hypertonic)?arrow_forward
- What is the purpose of soaking the egg in vinegar? Explain the rationale of vinegar reaction to the shell. What is Chorioallantoic Membrane? Differentiate the following: hypotonic solution, isotonic solution and hypertonic solution. Then classify respectively the 3 solutions used in the experiment (experiment is 2 eggs soaked in vinegar for 2 days and 1 day in separate solution per egg, one for water and 1 for super saline solution) What is osmosis? Is an egg considered to be cell? Why?arrow_forwardSponges are full of holes, jellyfish are big open sacs, and flatworms are flat. How are these features important in facilitating the process of diffusion?arrow_forwardRelate the function of contractile vacuoles to the following experi-mental observations: to expel an amount of fluid equal in volume to its own volume required 4 to 53 minutes for some freshwater unicel-lular eukaryotes, and between 2 and 5 hours for some marine species.arrow_forward
- 1) Animals that are osmoconformers _______. A) almost always live on land or in fresh water habitats B) typically have a higher plasma osmolarity than other vertebrates C) are constantly losing water to their environment via osmosis D) most often secrete nitrogenous wastes in the form of uric acidarrow_forwardHow do freshwater fish regulate osmotic stress in their environment? O take in electrolytes through simple diffusion excrete large quantities of electrolytes excrete large quantities of water consume large quantities of waterarrow_forwarddescribe the following body transports systems: Active (Primary) Passive (diffusion- simple, faciliated) Hydrostatic forces Osmotic forces osmosisarrow_forward
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