Cori cycle involves the conversion of

Options

A. lactic acid urea into gylcogen in muscle
B. ammonia into urea in liver
C. glycogen into lactic acid in liver
D. lactic acid into glycogen in liver

Answer

### Step-by-Step Solution:

1. **Understanding the Cori Cycle**: The Cori cycle, also known as the lactic acid cycle, is a metabolic pathway that involves the conversion of lactate (produced in muscles during anaerobic respiration) back into glucose in the liver.

2. **Lactate Production**: During intense exercise, muscles undergo anaerobic glycolysis, leading to the production of lactate (or lactic acid) from glucose. This occurs when oxygen levels are low, and the muscles need energy quickly.

3. **Transport to Liver**: The lactate produced in the muscles is then transported to the liver through the bloodstream.

4. **Conversion in Liver**: In the liver, lactate is converted back into glucose through a process called gluconeogenesis. This glucose can then be released back into the bloodstream to be used as an energy source by the muscles.

5. **Replenishing Glycogen**: If muscle activity has ceased and there is no immediate need for glucose, the liver can convert this glucose into glycogen for storage through a process known as glycogenesis.

6. **Summary of the Cycle**: The cycle can be summarized as follows:
- Muscles convert glucose to lactate (anaerobic glycolysis).
- Lactate is transported to the liver.
- In the liver, lactate is converted back to glucose.
- Glucose can be used for energy or converted to glycogen for storage.

### Final Answer:
The Cori cycle involves the conversion of **lactic acid into glycogen in the liver**.

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