Final answer:
The cycle in which lactate is removed from muscle tissue and converted back into glucose in the liver is called gluconeogenesis, or the Cori Cycle. Option number a is correct.
Step-by-step explanation:
The cycle in which lactate is removed from muscle tissue and returned to the liver to produce glucose is known as gluconeogenesis. This cycle, named after Carl and Gerti Cori, is also referred to as the Cori Cycle. It is a critical physiological process that occurs during conditions such as fasting, starvation or low carbohydrate diets.
The Cori Cycle helps to maintain blood glucose concentrations by converting lactate, which accumulates in muscle tissues during vigorous exercise, back into glucose in the liver. This glucose can then be used as an energy source by glucose-dependent organs, particularly the brain, which can only utilize glucose for energy.