As the bear enters hibernation, its metabolic processes such as body temperature, heart rate, and respiratory rate are reduced. But bears do not lower the body temperature as much as once thought. Their hibernation temperature is around 88 degrees and waking temperature is 100 degrees F. This relatively high sleeping temperature allows bears to become fully alert if aroused, perhaps to enable the bear to protect itself from predators and other dangers without unnecessarily taxing their energy reserves. Over the course of a hibernating season it is thought that bears use approximately 4 thousand calories a day, which results in a weight loss of about 20 percent of it body weight by spring.
Answer:
The correct answer is option a.
Explanation:
The GLUT-4 or glucose transporter type 4 refers to a protein encoded in humans. It is the insulin-regulated glucose transporter, which is found mainly in the striated muscles and adipose tissues. The increased level of insulin leads to the uptake of glucose into the cells. When insulin combines with the membrane receptors the GLUT-4, which is stored in the cell in the form of transport vesicles gets quickly assimilated into the plasma membrane. When the concentration of insulin becomes low, the majority of GLUT-4 gets sequestered in the intracellular vesicles in the fat and muscle cells.
B. Antibodies produced by B cells
