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How does the diaphragm can be forced to move higher than normal by contraction of what muscles?
Wiki User
∙ 11y ago
The abdominal muscles squeeze abdominal organs inwards increasing the pressure in the abdominal cavity, thus forcing the diaphragm closer to the lungs.
Wiki User
∙ 11y ago
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Why do you need to reduce amount of light with the diaphragm to see bacteria in hanging drop slide?
to clearly see the bacteria and higher contrast.
How does inhalation occur in the human body?
Inhalation is the process of taking air into the lungs. For this to occur, the air pressure inside the lungs must be lower than that of the external atmosphere as air flows from areas of higher pressure to lower pressure. This is achieved by the contraction of the external intercostal muscles and the relaxation of the internal intercostals which acts to pull the ribcage upwards and outwards, hence, increasing the volume of the thoracic cavity. The diaphragm also contracts to extend the cavity further downwards. Due to the function of the pleural membrane, the size of the lungs is increased which, in turn, creates an area of lower air pressure inside the lungs; hence, air is drawn into the lungs.Read more: What_happens_during_inhalation_and_exhalation
Taking in air as the diaphragm contracts and pulls downward?
The diaphragm will contract and become flat instead of curved. This will give more air in the ribcage for the lungs, which now have a lower pressure (x amount of particles in a larger space). This draws air in from the outside as the pressure is higher outside of the lungs. Hence why you breathe. The ribcage will push up and outward as the lungs expand.
What causes the pulmonary valve to close?
This is caused by a difference in pressure: higher pressure in the ventricle than in the atrium. As the atrium contraction finishes filling the ventricle with blood, the equalization of pressure allows the valve to fold back toward the atrium. The beginning of the contraction of the ventricular cardiac muscle causes higher pressure in the ventricle than the atrium, and this seals the valve shut. The valve opens again as the ventricle relaxes, and the atrium, filled again with blood, begins another contraction.
Respiratory function of the thorax?
The thorax is the region of the trunk between the neck and the diaphragm (essentially the chest). Its main respiratory function (despite being the space that contains all the other respiratory organs) is to enable the act of breathing. Essentially, the act of breathing is about changing the volume of your thoracic cavity; increasing it to breathe in and decreasing it to breathe out. Your lungs are surrounded by an airtight 'skin' called the pleural membrane. This allows the two lungs to be contained in one airtight sac and the only way in or out is through the trachea and ultimately the mouth or nose. When the thoracic space increases, a pressure gradient is created between the external (higher) air pressure and the internal (lower) air pressure, thus, air flows down the pressure gradient into the lungs to equalize the pressure and you have breathed in. When breathing out the reverse happens, the thoracic volume decreases creating a pressure gradient (higher on the inside, lower on the outside) and air flows out of the lungs. Muscles are responsible for changing the volume of your thoracic cavity. The most important is the diaphragm. When relaxed it is dome shaped with the top near the base of your lungs and the bottom at the lower end of your rib cage. When it contracts, it pulls down and increases the internal space allowing the inspiration of air. The other muscles involved are called the intercostals. They are located in between your ribs and are divided between the internal and the external ones. When the external intercostal muscles contract, they increase the space between each of the ribs and therefore increase the thoracic space. When the internal intercostal muscles contract, they pull the ribs closer together and decrease the internal volume (breathing out). There are also muscles in the neck (sternocleidomastoid and scalenes) that help the chest rise up and out when inspiring. All these muscles work together to increase the thoracic volume and enable the act of breathing.
How does the action of the external intercostal and diaphragm muscles draw air up your nose?
External intercostal and diaphragm increase the volume of the lungs, this action dicreases the pressure of the lungs. (we know pressure moves from the region of higher region to lower, in this case pressure is high in atmosphere and low in lungs). So air gets drew up in our nose.
Why is the ventricular wave higher?
Assuming you are talking about Electrocardiogram readings, the ventricular contraction is represented by the 'R' wave. The R wave is so much higher because the left and right ventricles are made up of the largest and strongest muscles of the heart and show the largest electrical energies on the ECG when they are contracted.
What causes air to flow out of the lung during expiration?
Relaxation of the diaphragm and intracostal muscles causes the pressure inside the thorax to be higher than that outside the body. the contraction and relaxation of these things change the volume of lungs and thus the air pressure in the lungs. Air moves from high pressure to low pressure, so during inspiration, the external intercostal muscles contract (the internal intercostals relax) which brings the rib cage upwards and outwards, the diagphram contracts and goes downwards which all increases the size of the thoracic cavity (and due to the plueral membrane) and thus that of the lungs. This creates an area of lower pressure in the lungs and therefore air is cause to flow in. The opposite occurs in expiration. the intercostal muscles work to pull the ribcage inwards and diaphragm bulges upwards making the lungs smaller. this then creates an area of high pressure in the lungs and air is drawn out " what way does it goes? high to low. "
What kind of nerves control skeletal muscle contraction?
The muscle spindle helps to control the contraction of muscles. It is a special sensory organ that uses sensory neuronal fibers to find how long the intrafusal muscle fibers are.
Why do athletes have a higher cardiac output?
regular aerobic exercise strengthens heart muscles which increases stroke volume (the volume of blood ejected with each contraction). since cardiac output = stroke volume * heart rate, this ultimately increases cardiac output.
Do men have a higher amount of muscles than women?
Naturaly, yes. But if women exirsize they can achieve a higher amount of muscles. -Lagasu ---- Check out the link for more information:
A muscle is stimulated and exhibits a contraction twitch Before this twitch is over it is stimulated again and a second twitch occurs piggyback on the first one and causes a higher contraction?
summation
What happens during the inhalation phase of breathing?
Inhalation is the process of taking air into the lungs. For this to occur, the air pressure inside the lungs must be lower than that of the external atmosphere as air flows from areas of higher pressure to lower pressure. This is achieved by the contraction of the external intercostal muscles and the relaxation of the internal intercostals which acts to pull the ribcage upwards and outwards, hence, increasing the volume of the thoracic cavity. The diaphragm also contracts to extend the cavity further downwards. Due to the function of the pleural membrane, the size of the lungs is increased which, in turn, creates an area of lower air pressure inside the lungs; hence, air is drawn into the lungs. Exhalation is the process of expelling air out of the lungs. For this to occur, the air pressure inside the lungs must be higher than that of the external atmosphere as air flows from areas of higher pressure to ones of lower pressure. This is achieved by the relaxation of the external intercostal muscles which bring the rib cage inwards and the diaphragm bulges upwards (recoiling to its original shape) respectively. The internal intercostal muscles contract so as to pull the rib cage further inwards, hence, decreasing the volume of the thoracic cavity and that of the lungs which, in turn, creates high pressure in the lungs; hence air is pushed out of lungs. In passive breathing, the movements of the diaphragm are responsible - the ribs aren't needed.
What is the effect of the diaphragm depression and the expansion of the rib cage inside the lungs?
When the diaphragm depresses and the rib cage expands, it increase the volume of the chest cavity. Actually, the rib cage doesn't really expand. The sternum (breastbone) move up and out slightly, moving the ribs slightly with it. This creates a pressure gradient where there is very low pressure in the lungs and higher pressure out. As a result of this gradient, air is almost sucked into the lungs, like air filling a vacuum space. As the diaphragm contracts and gravity pulls the ribs and sternum back down, the air is forced out of the lungs.
What effect does the depression of the diaphragm and the expansion of the rip cage and its pressure inside the lungs?
When the diaphragm depresses and the rib cage expands, it increase the volume of the chest cavity. Actually, the rib cage doesn't really expand. The sternum (breastbone) move up and out slightly, moving the ribs slightly with it. This creates a pressure gradient where there is very low pressure in the lungs and higher pressure out. As a result of this gradient, air is almost sucked into the lungs, like air filling a vacuum space. As the diaphragm contracts and gravity pulls the ribs and sternum back down, the air is forced out of the lungs.
How can you build your muscles endurance?
Lower weight, higher reps.
How can you dunk higher?
build up your leg muscles and get a running start
