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Study of following a. The accumulation...

Study of following
a. The accumulation of pyruvic acid in the muscle cause fatigue
B. ATP is resynthesized in the muscle by the phosphorylation of ADP by a phosphagen.
C. Cori and Cori cycle occurs in the liver
D. The phosphagen in the vertebrate muscle is arginine phosphate.
The correct set of answers for muscle contraction is

A

A and D

B

B and D

C

C and D

D

B and C

Text Solution

AI Generated Solution

The correct Answer is:
To determine the correct set of answers regarding muscle contraction from the given statements, we will analyze each statement one by one. ### Step-by-Step Solution: 1. **Statement A: The accumulation of pyruvic acid in the muscle causes fatigue.** - This statement is **incorrect**. During intense exercise, when oxygen is limited, pyruvic acid is converted into lactic acid, which leads to muscle fatigue. Therefore, it is the accumulation of lactic acid, not pyruvic acid, that causes fatigue. 2. **Statement B: ATP is resynthesized in the muscle by the phosphorylation of ADP by a phosphagen.** - This statement is **correct**. ATP (adenosine triphosphate) is the energy currency of the cell. When ATP is used for energy, it is converted to ADP (adenosine diphosphate) and inorganic phosphate. Phosphagens, such as creatine phosphate in muscles, can donate a phosphate group to ADP to regenerate ATP. 3. **Statement C: Cori and Cori cycle occurs in the liver.** - This statement is **correct**. The Cori cycle involves the conversion of lactate produced in the muscles during anaerobic respiration back into glucose in the liver. This process helps to recycle lactate and is crucial during intense exercise. 4. **Statement D: The phosphagen in the vertebrate muscle is arginine phosphate.** - This statement is **incorrect**. In vertebrate muscles, the primary phosphagen is creatine phosphate, not arginine phosphate. Arginine phosphate is found in some invertebrates. ### Conclusion: Based on the analysis: - **Correct Statements**: B and C - **Incorrect Statements**: A and D Thus, the correct set of answers regarding muscle contraction is **B and C**.
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