Question

18. A student participated in a cycling competition in his school. When he returned to his home, he experienced severe cramps in his legs due to the accumulation of lactic acids in muscle cells. His mother advised the student to take a hot water bath. The student recalled that her mother is right; it will improve the circulation of blood that will ultimately increase oxygen supply in his body. How does an increase in oxygen supply affect the accumulation of lactic acid
Enables the complete breakdown of lactic acid into oxygen and water
Enables the complete breakdown of lactic acid into glucose and energy
Allows lactic acid to break completely into carbon dioxide and water
Allows lactic acid to break completely into carbon dioxide and glucose​

Answer 1

An increase in oxygen supply affect the accumulation of lactic acid - Allows lactic acid to break completely into carbon dioxide and water

• Cycling is a form of intense exercise. which causes the metabolism of glucose in the absence of oxygen into lactic acid and only 2molecules of ATP are produced.

Glucose ----------------> Lactate + energy

(absence of o2)

• During aerobic respiration, glucose is broken down into 3-carbon molecule pyruvate and 32 molecules of ATP.

Glucose ----------------> pyruvate + energy

(presence of o2)

• This lactic acid is accumulated in muscle cells causing cramps.

• After taking a hot water bath it helps in the relaxation of blood vessels causing improvement in blood circulation. Oxygen supply replenishes, and lactic acid is broken down into carbon dioxide and water.
• And eventually relieves cramps.

Lactic acid + oxygen ---------> CO₂ + H₂O

Hence the correct option is - Allows lactic acid to break completely into carbon dioxide and water

#spj3

Answer 2

Answer:

Explanation:

allow s lactic acid