Question

Giving out medals and fan Plz Help....

How is blood flow related to lung function during exercise?

Answer 1

Blood vessels are dilated to increase the amount of oxygen carried in the blood, and the lungs work harder to meet the body's oxygen demands.

Blood volume increases during exercise, making the body more efficient, so it is not necessary for the lungs to work as hard.

The lungs determine the speed at which the heart pumps, so blood flows at a level that accommodates oxygen absorption in the muscles.

The lungs expand and contract, which increases the rate of blood flow so the muscles can

Answer 2

@PRAETORIAN.10 Plz help

Answer 3

its all to do with pulmonary circulation

Answer 4

obviously blood flow has more to do with the heart than the lungs as the heart pumps oxygenated blood to the body's extremities and vitals

Answer 5

'cause blood from organs is diverted to muscles

Answer 6

okay i'm going to send you a bunch of info and then explain it

Answer 7

When you exercise or compete in sports, you notice several things about your body. You breathe heavier and faster, your heart beats faster, your muscles hurt and you sweat. These are all normal responses to exercise whether you work out regularly or only once in a while or whether you are a "weekend warrior" or a trained athlete. When you watch world-class athletes compete, you see the same responses, only magnified.

The body has an incredibly complex set of processes to meet the demands of working muscles. Every system in the body is involved. To understand, we need to look at how your body responds to strenuous exercise -- how muscles, blood circulation, breathing and body heat are affected. You will also see how these responses can be enhanced by training.

Answer 8

Any type of exercise uses your muscles. Running, swimming, weightlifting -- any sport you can imagine -- uses different muscle groups to generate motion. In running and swimming, your muscles are working to accelerate your body and keep it moving. In weightlifting, your muscles are working to move a weight. Exercise means muscle activity!

As you use your muscles, they begin to make demands on the rest of the body. In strenuous exercise, just about every system in your body either focuses its efforts on helping the muscles do their work, or it shuts down. For example, your heart beats faster during strenuous exercise so that it can pump more blood to the muscles, and your stomach shuts down during strenuous exercise so that it does not waste energy that the muscles can use.

When you exercise, your muscles act something like electric motors. Your muscles take in a source of energy and they use it to generate force. An electric motor uses electricity to supply its energy. Your muscles are biochemical motors, and they use a chemical called adenosine triphosphate (ATP) for their energy source. During the process of "burning" ATP, your muscles need three things:

They need oxygen, because chemical reactions require ATP and oxygen is consumed to produce ATP.

They need to eliminate metabolic wastes (carbon dioxide, lactic acid) that the chemical reactions generate.

They need to get rid of heat. Just like an electric motor, a working muscle generates heat that it needs to get rid of.

I­n order to continue exercising, your muscles must continuously make ATP. To make this happen, your body must supply oxygen to the muscles and eliminate the waste products and heat. The more strenuous the exercise, the greater the demands of working muscle. If these needs are not met, then exercise will cease -- that is, you become exhausted and you won't be able to keep going.

To meet the needs of working muscle, the body has an orchestrated response involving the heart, blood vessels, nervous system, lungs, liver and skin.

Answer 9

So, I will skip: Exercise and ATP, Exercise and the Phosphagen System, Exercise and the Glycogen-Lactic Acid System because theyre not particularly relevant to your inquiry.

Answer 10

By two minutes of exercise, the body responds to supply working muscles with oxygen. When oxygen is present, glucose can be completely broken down into carbon dioxide and water in a process called aerobic respiration. The glucose can come from three different places:
remaining glycogen supplies in the muscles
breakdown of the liver's glycogen into glucose, which gets to working muscle through the bloodstream
absorption of glucose from food in the intestine, which gets to working muscle through the bloodstream
Aerobic respiration can also use fatty acids from fat reserves in muscle and the body to produce ATP. In extreme cases (like starvation), proteins can also be broken down into amino acids and used to make ATP. Aerobic respiration would use carbohydrates first, then fats and finally proteins, if necessary. Aerobic respiration takes even more chemical reactions to produce ATP than either of the above systems. Aerobic respiration produces ATP at the slowest rate of the three systems, but it can continue to supply ATP for several hours or longer, so long as the fuel supply lasts.

Answer 11

So imagine that you start running. Here's what happens:
The muscle cells burn off the ATP they have floating around in about 3 seconds.
The phosphagen system kicks in and supplies energy for 8 to 10 seconds. This would be the major energy system used by the muscles of a 100-meter sprinter or weight lifter, where rapid acceleration, short-duration exercise occurs.
If exercise continues longer, then the glycogen-lactic acid system kicks in. This would be true for short-distance exercises such as a 200- or 400-meter dash or 100-meter swim.
Finally, if exercise continues, then aerobic respiration takes over. This would occur in endurance events such as an 800-meter dash, marathon run, rowing, cross-country skiing and distance skating.

Answer 12

But here comes the crux of your inquisition:

Answer 13

If you are going to be exercising for more than a couple of minutes, your body needs to get oxygen to the muscles or the muscles will stop working. Just how much oxygen your muscles will use depends on two processes: getting blood to the muscles and extracting oxygen from the blood into the muscle tissue. Your working muscles can take oxygen out of the blood three times as well as your resting muscles. Your body has several ways to increase the flow of oxygen-rich blood to working muscle:
increased local blood flow to the working muscle
diversion of blood flow from nonessential organs to the working muscle
increased flow of blood from the heart (cardiac output)
increased rate and depth of breathing
increased unloading of oxygen from hemoglobin in working muscle
These mechanisms can increase the blood flow to your working muscle by almost five times. That means that the amount of oxygen available to the working muscle can be increased by almost 15 times!

Answer 14

Again, I'll skip Exercise and Increased Blood Flow, Exercise and Body Heat

Answer 15

Making the Heart Pump Harder
Your heart, also a muscle, gets a workout during exercise, too, and its job is to get more blood out to the body's hard-working muscles. The heart's blood flow increases by about four or five times from that of its resting state. Your body does this by increasing the rate of your heartbeat and the amount of blood that comes through the heart and goes out to the rest of the body. The rate of blood pumped by the heart (cardiac output) is a product of the rate at which the heart beats (heart rate) and the volume of blood that the heart ejects with each beat (stroke volume). In a resting heart, the cardiac output is about 5 liters a minute (0.07 L x 70 beats/min = 4.9 L/min). As you begin to exercise, sympathetic nerves stimulate the heart to beat with more force and faster; the heart rate can increase about threefold. Also, the sympathetic nerve stimulation to the veins causes them to constrict. This, along with more blood being returned from the working muscles, increases the amount of blood returned to the heart (venous return). The increased venous return helps to increase the stroke volume by about 30 to 40 percent. When the heart is pumping at full force, the cardiac output is about 20-25 liters per minute.
Breathing Faster and Deeper
So far, we have talked about getting more blood to working muscle. Your lungs and the rest of your respiratory system need to provide more oxygen for the blood, too. The rate and depth of your breathing will increase because of these events:
Sympathetic nerves stimulate the respiratory muscles to increase the rate of breathing.
Metabolic byproducts from muscles (lactic acid, hydrogen ions, carbon dioxide) in the blood stimulate the respiratory centers in the brainstem, which, in turn, further stimulates the respiratory muscles.
Slightly higher blood pressure, caused by the increased force of each heartbeat and by the elevated cardiac output, opens blood flow to more air sacs (alveoli) in the lungs. This increases the ventilation and allows more oxygen to enter the blood.
As the lungs absorb more oxygen and the blood flow to the muscles increases, your muscles have more oxygen.

Answer 16

Your body has increased the flow of oxygen-rich blood to your muscles, but your muscles still need to get the oxygen out of the blood. An exchange of oxygen and carbon dioxide is the key to this. A protein called hemoglobin, which is found in red blood cells, carries most of the oxygen in the blood. Hemoglobin can bind oxygen and/or carbon dioxide; the amount of oxygen bound to hemoglobin is determined by the oxygen concentration, carbon dioxide concentration and pH. Normally, hemoglobin works like this:
Hemoglobin in red blood cells entering the lungs has carbon dioxide bound to it.
In the lungs, oxygen concentration is high and carbon dioxide concentration is low due to breathing.
Hemoglobin binds oxygen and releases carbon dioxide.
Hemoglobin gets transported through the heart and blood vessels to the muscle.
In muscle, the carbon dioxide concentration is high and the oxygen concentration is low due to metabolism.
Hemoglobin releases oxygen and binds carbon dioxide.
Hemoglobin gets transported back to the lungs and the cycle repeats.
As you exercise, though, the metabolic activity is high, more acids (hydrogen ions, lactic acid) are produced and the local pH is lower than normal. The low pH reduces the attraction between oxygen and hemoglobin and causes the hemoglobin to release more oxygen than usual. This increases the oxygen delivered to the muscle.
Getting Rid of Waste
Your exercising body is using energy and producing waste, such as lactic acid, carbon dioxide, adenosine and hydrogen ions. Your muscles need to dump these metabolic wastes to continue exercise. All that extra blood that is flowing to the muscles and bringing more oxygen can also take the wastes away. The hemoglobin in the blood will carry away the carbon dioxide, for example.

Answer 17

okay, phew, now that you have all the literature here is the condensed version

Answer 18

the heart needs to pump blood, the extremities need to have oxygenated blood and so the lungs have to work overtime double-shifts to intake blood

Answer 19

"Blood flow is a huge factor in a successful workout. Blood carries the nutrients and oxygen your muscles need to produce speed, strength, agility, and even endurance."

Answer 20

In order to supply working muscles, the body must redistribute demands for circulation. If you look at the diagram then you can see that there is a large demand for blood flow to the heart, lungs, and working muscles. So to answer your question in part, many organs (stomach, kidneys, intestines) experience vasoconstriction from sympathetic stimulation through vascular pathways which decreases blood flow used for nonessential processes like digestion.

Answer 21

The vascular pathways through muscles also experience vasoconstriction but waste or bi-products created during exercise counteract this response. As ATP (adenosine triphosphate), or the muscle’s energy source along with oxygen, glucose, and amino acids, increases with exercise, the bi-products (carbon dioxide, hydrogen ion, potassium) created during metabolic reactions leave the muscles and create vasodilation through capillaries (thin walled blood vessels) surrounding muscle tissue. This helps to facilitate increased blood flow and oxygen supply to working muscles groups.

Answer 22

The rate of blood flow through a working muscle can be 15-20 times greater than a resting muscle. When a muscle is at rest, only a small portion of the surrounding capillaries are open and supplying blood. During an exercise session, stimulation causes 100% of those capillaries to be open. This increase in blood flow stems from the need to bring in large amounts of nutrients and dispose of metabolic waste products to the liver for recycling or elimination. Increased flow also returns more blood back to the heart and lungs for re-oxygenation. This increased amount of flow causes a large increase in cardiac output or the amount of blood the heart pumps in one minute .

Answer 23

so finally we have the answer although youre probably seriously confused by now.

Answer 24

simply put, lungs are related to blood flow (especially, but not limited to, exercise) because the lungs oxygenate the blood that is pumped, via the heart, to the limbs. the lungs also re-oxygenate blood that has been returned to the heart.

Answer 25

thus making prolonged exercise easier due to less fatigue

Answer 26

the rate of blood flow during exercise is significantly greater than at rest and thus the role lungs play is pivotal to say at least

Answer 27

hope i helped more than i confused

Answer 28

@mayaal Perhaps a bit more simple:

Blood vessels are dilated to increase the amount of oxygen carried in the blood, and the lungs work harder to meet the body's oxygen demands.

How would blood volume increase? Is the body suddenly making a quart of new blood in a matter of seconds? And even if that is the case, what does this have to do with blood flow and lung function?

If the lungs determine the heart speed, why can I stop breathing and have my heart rate stay ready for quite a length of time.

Anyway, the first one is the best answer.

Answer 29

simple just isnt my thing. suave and sophisticated it. ;)