Question

Почему медведь зимой впадает в спячку????

Answer 1

Он делает запасы на зиму а земой её же нет вот он и спит также его жир это энегии а если он будет ходитьзимой тогда он умрёт из за не достатка инергии

Answer 2

Медведь не делает запасы на зиму, а едят они растительную пищу, что зимой конечно её не достать. Вот и спят лентяи.

Также способствует из-за недостатка пищи экономному расходованию жира. Жир - это энергия.

Answer 3

Why do bears hibernate in winter?

Bears hibernate in winter as a survival strategy to conserve energy and survive the harsh conditions when food is scarce. Hibernation is a state of deep sleep that allows bears to lower their metabolic rate, body temperature, and heart rate, which helps them conserve energy and reduce their need for food.

During hibernation, bears enter a state of torpor, where their body functions slow down significantly. They can go for several months without eating, drinking, urinating, or defecating. This adaptation allows them to survive in environments where food is limited or unavailable during the winter months.

How does hibernation benefit bears?

Hibernation provides several benefits to bears:

1. Energy conservation: By reducing their metabolic rate and body temperature, bears can conserve energy during periods of food scarcity. This allows them to survive on their fat reserves until food becomes available again.

2. Protection from harsh conditions: Hibernation provides bears with protection from extreme cold temperatures, snowstorms, and other harsh winter conditions. By staying in a den and entering a state of torpor, bears can avoid exposure to these challenging environmental factors.

3. Preservation of muscle mass: During hibernation, bears experience muscle atrophy to some extent. However, they are able to preserve a significant amount of their muscle mass compared to other animals that undergo prolonged periods of inactivity. This allows them to be relatively active and mobile when they emerge from hibernation.

4. Conservation of water: Bears do not need to drink water during hibernation since they produce very concentrated urine and do not urinate. This helps them conserve water and maintain their hydration levels during the winter months.

How do bears prepare for hibernation?

Before entering hibernation, bears go through a period of hyperphagia, which is an intense increase in feeding activity. They consume large amounts of food to build up their fat reserves, which will sustain them throughout the hibernation period.

During this time, bears actively search for high-calorie food sources, such as berries, nuts, and fish, to accumulate the necessary fat stores. They may also scavenge for carrion or feed on other available food sources to meet their energy requirements.

Once they have accumulated enough fat, bears find a suitable den where they will spend the winter. Dens can be located in caves, hollow trees, or dug into the ground. Bears typically line their dens with leaves, grass, and other materials to provide insulation and create a comfortable environment for hibernation.

How do bears survive without eating or drinking during hibernation?

During hibernation, bears rely on their fat reserves for energy. The fat stores accumulated during the hyperphagia phase provide the necessary fuel to sustain them throughout the winter months when food is scarce.

Bears have a unique physiological adaptation that allows them to recycle their metabolic waste products during hibernation. They reabsorb nitrogenous waste products, such as urea, from their urine back into their bloodstream. This recycling process helps them conserve water and maintain their hydration levels without the need for drinking or urinating.

When do bears typically hibernate?

The timing of bear hibernation can vary depending on factors such as geographic location, climate, and food availability. In general, bears enter hibernation in late fall or early winter when food becomes scarce and temperatures drop.

For example, in colder regions, bears may start hibernating as early as October or November and emerge from hibernation in March or April. In milder climates, bears may enter hibernation later and have a shorter hibernation period.

It's important to note that not all bears hibernate. Some species, like the polar bear, do not undergo true hibernation but enter a state of reduced activity known as "walking hibernation" or "winter dormancy"