What are the biological properties of Alaskan wood frog ?

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What are the biological properties of Alaskan wood frog ? What is Alaskan tree frog ?

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What are the biological properties of Alaskan wood frog ?

Many living things have some resistance to freezing; however, few animals can reach the level of the Rana Sylvatica species Alaska Tree Frogs. These tiny frogs can survive for weeks while over 65% of the water in their bodies is completely frozen while they are in a state of freezing. This mechanism is so extreme that frogs sometimes do not breathe for days or even weeks, and their hearts do not beat. During this “freezing state”, the frog’s metabolic activities slow down to a halt. During the winter, animals can freeze and thaw several times.
Frogs use chemicals called “crayoprotectants” to achieve this. These are chemicals that can lower the freezing point of the animal’s tissues below normal. Their increase in quantity makes it possible for the cells of the frog to survive. Many animals’ cells contract when exposed to temperatures below freezing. This is because the ice formation in the tissues attracts the water in the cell.

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What is unique for Alaskan Tree Frog ?

The frost tolerance of the Alaskan Tree Frog has attracted considerable attention by biologists. According to the researches, more than 65% of the water in these frogs’ bodies, which encounter freezing cold, is completely frozen. However, they can survive for weeks, despite the frost that has no signs of life.

This mechanism is so extreme that frogs sometimes do not breathe for days or even weeks, and hearts do not beat. Due to the ice covering the toad’s skin, abdomen and muscle fibers, blood circulation stops completely. Even when the aortic vessel is cut, there is no bleeding. In this process, the frog’s heart and other vital organs are pale in color, their arms and legs are hard, and their eyes are hazy.

For frogs whose metabolism activities slow down to a halt, this process takes up to four months. In the most freezing times of the winter months, frogs that freeze with everything around them are defrosted under the leaves close to the soil surface as the temperature rises. After the ice is thawed, the frogs, which start to beat the heart again, breathe in series. In this way, frogs that return to their vital activities move to their lives by acting in almost 1 day.

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Does the Alaskan Tree Frog freeze in winter ?

Freezing of Alaskan Tree Frog in winter makes it unique. The frost-thaw cycle of frogs repeats several times throughout the winter. According to scientists investigating this mechanism, tree frogs have a “natural antifreeze” system in their blood. In other words, when the ice crystals in the air come into contact with the frog, the frog’s skin freezes first and the body becomes hard and brittle; If they almost fall to the ground, they become broken. Then a special protein (nucleating proteins) in the blood causes the water in the blood to freeze. The ice formed absorbs approximately 70% of the water in the frog’s cells. Meanwhile, the frog’s liver begins to secrete a lot of glucose (some kind of sugar). Secreted glucose supports them by filling the empty cells. The high glucose concentration in the cells prevents them from freezing as the temperature drops. In the hibernation, the glucose concentration in the cells of frogs can be a hundred times higher than normal in winter. This sugary liquid prevents more water from being drawn from the cells because emptying all the water means death of the frogs.

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What is Alaskan wood frog ? What is the importance of Alaskan wood frog for medical world ?

The tree frog can be an example of how people deal with their medical problems. These problems include cryopreservation, safe freezing and thawing for organ transplants, a high glucose level in the body, and a safe restart of blood flow after a stroke.

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What are the biological properties of Alaskan tree frog ?

The tree frog has two scientific names: Lithobates sylvaticus and Rana sylvatica. It is a small animal, approximately 1.4 to 3.25 inches long. The frog is brown, orange-red or tan. There is a dark line in front of each eye and a dark spot on the back. There are dark, horizontal bars on the hind legs, dark patch on the upper inner corner of each leg and dark spots on the other parts of the body.
The range of the animal covers most of Canada and extends to Alaska and the northeastern United States. There is also a small area in the center of the United States, where tree frogs can be found. The animals, as the name implies, live mainly in the forest, but they also live in the grasslands and tundra. Adults eat insects and other small invertebrates. Tadpoles eat only plants.

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What is the most important feature of Alaskan tree frog ?

The most important feature of the Alaska tree frog is that it freezes in winter and stops its heart, and continues its life when spring comes.

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What is the scientific name of Alaskan tree frog ?

The scientific name of Alaskan tree frog is Rana Sylvatica.

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Why does an Alaskan tree frog freeze in winter ?

Alaskan tree frog, very interestingly, by keeping the body frozen in freezing temperatures in winter, it stops its vital activities, and the spring comes to life, dissolving with the warming of the air and continuing its vital activities. Although this situation is interesting to us, it is scientifically possible and realized.

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How does freezing mechanism work in Alaskan tree frogs ?

65% of the Alaska tree frog’s body is water. In cold weather, the water in your body freezes and the heart does not beat, it does not breathe. But his cells continue to live, the reason for this is some chemicals in his body. Thanks to the chemical it releases, the freezing point of its cells decreases and the cells continue to live even if their body is frozen. With the warming of the air, a dissolution starts from the inside of the frog’s body and the water in the body melts. The blood circulation begins and the heart of the frog beats and starts breathing. The frog, whose body is dissolved, continues its life from where it left off.