Frog Defence Mechanisms Research into several frog species has produced evidence that although frog’s possess the same general characteristics, many different species have developed their own unique methods of defence and escaping predation. Some species of frog have discovered that one of the best forms of defence is simply to hide. Many frogs have developed a great number of different disguises to escape the sight of potential predators. For example the Mossy frog (Rana septentrionalis- Fig. 2.7) – is covered in small bumps and spines, (Raxworthy, 2007), which along with it’s brown/green colouration allows it to blend perfectly into it’s mossy surroundings.
The solutes are called electrolytes, which maintain healthy bodily functions. When an electrolyte dissolves it breaks up into ions. There are millions of electrolytes within a cell. Water moves inside and outside the cell, with osmotic pressure, which is the force that pulls fluid from one place to another. The level of osmotic pressure is equal in the intracellular fluid, and the extracellular fluid.’ (Study.com, 2015) ‘Osmotic pressure is vital within the human body because it allows water to enter a cell if there is lack of water, and vice versa, if there is too much water within one cell, the osmotic pressure will allows the electrolytes to exit a cell.’ (Study.com, 2015) ‘Intracellular fluid has important functions, it transports food within the cells, it also brings waste products from the cells so that they can be picked up and excreted from the body, and it maintains the shape and size of the cell.’ (Nursing411.org, 2015) ‘Extracellular fluid is located outside the body cells.
Five ways water is used in the body - Your cells need water to live and survive. - Water helps remove dangerous toxins from the body. - You need water to keep your metabolism moving properly (which helps you burn calories) - IF you don't have enough water, your blood pressure can drop suddenly - Water keeps your skin hydrated - Water allows you to
8.3.1.4 Identify data sources, gather, process and analyse secondary information about the differing views of Volta and Galvani about animal and chemical electricity and discuss whether their different views contributed to increased understanding of electricity. Luigi Galvani was an Italian doctor and physicist. In his work, he studied the anatomy of frogs. * In 1786, he observed that the leg muscle of a dissected from twitched when it was touched by a pair of scissors during a storm. * Later he observed that a dissected frog’s leg would also twitch when the frog’s spine was touched by a scalpel while a charge generator was activated.
Compared to the first two steps the last two steps of the trail look like a Matis massage. The next stage to the ritual is to inject frog poison from green tree frogs directly into the blood stream with needles made from wood. The poison is also placed onto open incisions on the skin. If the hunter does not throw up it shows great resistance and in the tribe
The end results proved that the hypothesis supported the experiment, that adrenalin speeds up the heart rate of daphnia and acetylcholine slows down the heart beat rate in daphnia as it does in humans. Daphnia: In order to fully understand this experiment you will need to know about daphnia itself and what the different type of liquids we used. The three millimeters Daphnia also know as water flea is a cold blooded and is linked to crustaceans like shrimps, crabs, and lobsters. The water flea which is also a nutritious fish food is found in lakes and streams. The name water flea comes from its salutatory swimming style.
“Boiled Frog" Phenomenon Student’s Name: Institution Affiliation: “Boiled Frog" Phenomenon A ccientist placed a living frog in container with cold water on a stove and slowly increased the flame beneath the container. The frog remained in the water as the water temperature approached boiling point. The frog did not realize the water was getting too hot until it was too late to leap out. Had the frog not adapted to the water, it could have escaped death. The tendency of the frog to adapt to the increase in water temperature cost it its life (Pollard, 2004).
Read the following poems by Seamus Heaney (“Death of a Naturalist”) and Ted Hughes (“Bullfrog”) in The Faber Book of Beasts (pp. 67-68 and pp. 42-43). In no more than 600 words, compare the ways the two poets represent frogs. “The Death of a Naturalist” written in blank verse using iambic pentameter to set the rhythm of the poem uses the frog and the lifecycle of the frog to represent the speakers’ reflection of his own transition from childhood through to adulthood.
Objectives: The Objectives for our laboratory # 4 experience included: (i) observing the general external features of a typical amphian, (ii) draw neat labelled sketches of the external features of the amphibian, (iii) observe, identify and draw labelled diagrams of the frog’s skin and comment on the structure, (iv) dissect the frog and observe the internal structures, comment on all the system Introduction: Amphibians are vertebrates that spend part of their lives under water (breathing with gills) and the remainder on land (breathing with lungs). Amphibians are cold-blooded; their body temperature depends on the temperature of their environment. There are three groups (orders) of living amphibians: newts and salamanders (urodeles); frogs and toads (anurans); and caecilians (the worm-like gymnophiones). The earliest amphibians evolved in the Devonian period from lobe-finned fish that used their strong, bony fins to venture onto dry land. They were the top predators in the Carboniferous and Permian periods, but they later faced competition from their descendants, the reptiles, who were better-adapted to life on dry land.
When such a tadpole hatches from an underwear jellylike mass of eggs, it (develops very much resembles a fish in outward appearance, with a vertical tail and with gills on subtopic 1) sides of its little head. The tadpole also possesses a fishlike two- chambered heart. As it grows, the tadpole spends day and night swimming about underwater, obtaining oxygen from the water through its gills, feeding on minute vegetable matter, and evading predators such as big fish. During this stage, however, fundamental changes in the tadpole’s physiology are taking place; it is beginning to resemble a land creature. Lungs develop, and, most dramatically, legs begin to grow.