Why does the rate of heart beat increases during exercise?

2 answers:

5 0

During exercises, our muscles needed energy for contractions. The heart pumps more rapidly and more powerfully during this time for a few reasons.

First, more oxygen and nutrients like glucose can be transported to the heart. Muscle cells uses oxygen and glucose for aerobic respiration to generate energy.

Secondly, more carbon dioxide and waste can be transported away from the muscles. Waste products from aerobic respiration includes carbon dioxide or water etc. The faster the heart pumps, the faster the blood gets transported so more waste can be carried away.

Thirdly, lactic acid can be carried away too. When oxygen supply is not enough, the cells undergo anaerobic respiration to generate energy. This type of respiration does not require oxygen, but a waste product called lactic acid is produced. Lactic acid must be carried away from cells because they're harmful. Therefore, the faster the heart pumps, the more lactic acid gets carried away.

Last but not least, heat can be carried away too. Part of the energy generated is turned into heat. Therefore, in order to help us cool down, blood travels fast to carry heat away from the heat generating muscle cells.

Virty [35]3 years ago

3 0

The rate of heart beat increases while exercise is due to the blood pressure..

You might be interested in

Laboratory studies indicate a client's blood glucose level is 185 mg/dl. Two hours have passed since the client ate breakfast. W

velikii [3]

Answer:

The answer is C. Serum glycosylated hemoglobin (Hb A1c) .

Explanation:

The serum glycosylated hemoglobin (Hb A1c) test is a diagnostic method used to evaluate the amount of glucose attached to the hemoglobin in blood. This technique is often applied to test the average amount of glucose attached to the hemoglobin in past three months, thus it can be applied for diabetes or pre-diabetes test. Therefore, it is the most reliable diagnostic test in this case.

5 0

3 years ago

Read 2 more answers

In a line of human cells grown in culture, a geneticist isolates a temperature-sensitive mutation at a locus that encodes an ace

GarryVolchara [31]

Answer:

A general decrease in transcriptional activation

Explanation:

When acetyl groups are added to histone proteins by acetyltransferase enzymes, the 30-nm chromatin fiber will not be formed because the proteins are prevented from doing so. This further destabilizes the chromatin structure and allows the occurrence of transcription. However, raising the cells to 40°C does not allow the acetyltransferase enzyme to function and hence the acetyl group will be hindered from being added to the histone protein which is the main target of the enzymes. Thus, transcription activation will be blocked because the chromatin and nucleosomes would remain stabilized.

5 0

3 years ago

Read 2 more answers

What do the rib muscles and diaphragm have in common?

Hatshy [7]

Answer:

Both are breathing muscles

Explanation:

When rib muscles and the diaphragm contract they increase the volume of the chest cavity, increasing the air pressure outside the body, causing air to rush into the lungs to fill the vacuum created by the increase in volume.

3 0

2 years ago

How a mutation in the DNA could affect the proteins made by the cell

julia-pushkina [17]

A mutation in DNA affects the entire protiens synthesis process by producing the incorrect amino acids in the wrong places, causing issues with the ability of the organism to survive depending on what the protein is in charge of.

3 0

3 years ago

The structure of the glomerular capillaries contributes to the formation of filtrate because __________.

Leokris [45]

The structure of the glomerular capillaries contributes to the formation of filtrate because the walls of the capillaries are much more permeable to water and small solutes than other capillaries. A tuft of capillaries situated within a Bowman's capsule at the end of a renal tubule in the vertebrate kidney that filters waste products from the blood and thus initiates urine formation.

3 0

3 years ago