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Nana76 [90]
3 years ago
8

After exercising, Theo is aware that anaerobic respiration occurred in his body because his muscles ache. Which substance caused

his muscles to feel sore?
lactic acid
glucose
carbon dioxide
glycogen

Biology
2 answers:
AURORKA [14]3 years ago
7 0
The answer is lactic acid.
Vikki [24]3 years ago
6 0

Answer:

The correct answer is lactic acid.

During vigorous exercise such as weight lifting, swimming etc the level of oxygen decreases in the muscle cells due to which complete oxidation of glucose could not take place.

Instead, the pyruvate is converted into lactate in presence of lactate dehydrogenase. It produces NAD⁺ being lost during the process of glycolysis.

Lactic acid can cause muscle discomfort and muscle soreness. However, it is not the only culprit responsible for delayed onset muscle soreness (DOMS).

Other factors may include swelling which is caused by the influx of prostaglandins, WBCs, and nutrients in muscle cells in order to repair the damage caused by exercise.

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Serga [27]

Answer:

1. Head, neck, upper limb, thorax - super vena cava - top of the right atrium.

2. Lower limb - inferior vena cava - bottom of the right atrium.

Explanation:

The Heart pumps the oxygen-rich blood to the different parts of the body to Otake oxygen and nutrients to these organs and then takes the oxygen-poor blood returns from the body to the heart.

The two major vessels that return oxygen-poor blood to the heart are 1. superior vena cava (SVC) that drainages Head, neck, upper limb, thorax and terminate at top of the right atrium, and 2. inferior vena cava (IVC), Lower limb and terminate at bottom of the right atrium.

1. Head, neck, upper limb, thorax - super vena cava - top of the right atrium.

2. Lower limb - inferior vena cava - bottom of the right atrium.

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