Fill in the blanks with suitable words:
(1)…………… `overset"Fermentation (muscle cells)"to` (2) ……… + ……….

Explanation

To fill in the blanks for the question regarding the fermentation process in muscle cells, we can break down the information as follows:

1. **Identify the substrate**: The process of fermentation in muscle cells begins with glucose. This is the primary substrate that is broken down during the fermentation process.

2. **Understand the process**: During fermentation, glucose is first converted into pyruvate through a process called glycolysis. This is common in both aerobic and anaerobic respiration.

3. **Determine the products of fermentation**: In muscle cells, when oxygen is not available (during intense exercise), pyruvate undergoes fermentation to produce lactic acid. Additionally, NAD+ is regenerated in the process.

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