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Respiratory System
The respiratory system includes the lungs and the airway. The questions in this category focus mainly on the anatomical and physiological processes associated with breathing.
2,890 Questions
What is the vital capacity of lungs?
Vital capacity is the maximum volume of air you can expel after taking the largest breath you are able. It usually ranges between 3-5 L but depends on age, sex, height, as well as ethnicity.
When does javelin use energy systems?
Javelin throwing primarily utilizes the anaerobic energy systems, specifically the ATP-CP (adenosine triphosphate-creatine phosphate) system, during the explosive phase of the throw, which lasts about 1-2 seconds. This system provides immediate energy for short bursts of high-intensity activity. Additionally, during training and recovery phases, the aerobic system may be engaged for overall conditioning and endurance. Thus, while the throw itself relies heavily on anaerobic energy, the athlete's overall training may incorporate both energy systems.
What portion of aerobic respiration requires oxygen?
glycolysis, Krebs cycle, oxidative phosphorylation
What muscle controls breathing?
The diaphragm, the external intercostal and the interchondral portion of the internal intercostal muscles are the main muscles that control breathing. Other muscles are sometimes used, but only if the person has a breathing disorder or if the body needs energy very quickly.
What divides the upper and lower airway?
The glottis is dividing line between the upper and lower airway
Is it possible to make a noise with your vocal chords without breathing?
No, that is not possible. Your vocal chords vibrate when air is forced through them so it would not be possible to use them without breathing.
What is the primary factor that initiates breathing in a newborn infant?
The primary factor that initiates breathing in newborns is the need for oxygen. The fetus actually practices breathing while still in the womb. So spanking them on the butt once they are born is totally unnecessary and no longer practiced. The newborn will take its first breath when it needs it, as long as the airway is clear. That is why one of the first things they do after a baby is born is to use a syringe to empty the airways of amniotic fluid. The rest is up to nature and instinct to take over and the baby will start breathing on their own.
Oh my god. I can't believe the above answer. I'm assuming you are looking for an answer for an A&P 2 class. The answer you are looking for is that during fetal life, the lungs of a fetus are filled with fluid and all respiratory exchanges are made by the placenta. Vascular shunts cause circulating blood to largely bypass the lungs. At birth, the fluid filled pathway empties, and the respiratory passageways fill with air. As the P co2 in the baby's blood rises, the respiratory centers are excited, causing the baby to take its first breath. The alveoli inflate and begin to function in gas exchange, but it is nearly two weeks before the lungs are fully inflated. You can find this in any A & P book and this information comes from an A&P 8th edition. Please don't use the answer provided above.
If a mammalian heart is removed, it will continue to beat for hours, providing that an adequate supply of warm oxygenated fluid of sutable composition is supplied to the muscle through the coronary vessels from the aorta. The origin of the heart-beat is independent from the rest of the body. The heart has its own pacemaker cells.
How greenhouse gases affect the respiratory system?
The health effects caused by greenhouse gases may include difficulty in breathing, wheezing, coughing, asthma and worsening of existing respiratory and cardiac conditions. These pollutants irritate the lungs.
Why is intrapleural pressure negative rather than positive?
Because the negative pressure is the major factor preventing the lungs from collapsing. If the intrapleural pressure became equal to atmospheric pressure the lungs would recoil and collapse.
What do humans breathe in at night?
The air doesn't change much from day to night, so we Breathe the same stuff at night as during the day.
2001 Ford F-150 heater system?
The heater system in a Ford F150 uses the same plenum box as the Navigator and Expedition, so any information you find on those will apply also to the F150. The operation of the system is fairly basic with a fan to blow air through the AC evaporator core followed by a blend door that can divert the air flow into the vent system or through the heater core...or any combination in between. You have mas heat when the AC compressor is off and all air diverted through the heater core, and max AC when the compressor is on and flow is blocked through the heater core. The blend door can regulate between those two extremes to get any temperature mix desired by the driver.
The most common fail mode for the system is a broken blend door. The door is on a vertical axis and when the axle connection breaks(most common failure) the door can swing back and forth randomly, controlled by turns, speed, air flow, gremlins, etc. The deal fix for this problem requires removal of the dash and plenum box, disconnecting the refrigerant system and draining the radiator. It ends up being an expensive repair, not because of the cost of the replacement parts, but the labor involved in getting to the box.
Check out HeaterTreater on Ebay or at heatertreater.net for diagnostic procedures to check the operation of the blend door and a cheap easy fix for the problem.
Are the steps of inhaling the opposite of the steps of exhaling?
Fairly so, since the process must cyclically repeat. In humans, the diaphragm moves downward, releasing its pressure on the lungs, which fill with air due to the difference in atmospheric pressure. The oxygen reaches the lungs where it is exchanged with carbon dioxide. The diaphragm relaxes, pushing upward and forcing air from the lungs, which also contract elastically.
The major difference is that inhalation requires energy for the muscle to pull downward. It returns to its normal position by relaxation.
You can blow (expel more than the usual air) by putting voluntary pressure on the rib cage and lungs with the intercostal and abdominal muscles -- this is the principle used to inflate a balloon by mouth.
Is carotene involved in respiration?
Carotene itself is not directly involved in respiration; rather, it is a pigment found in plants that plays a role in photosynthesis. Carotene helps capture light energy, which is essential for photosynthesis, the process by which plants convert light energy into chemical energy. While respiration occurs in all living cells to produce energy by breaking down glucose, carotene's primary function relates to light absorption rather than energy release. However, the products of photosynthesis, which involve carotene, ultimately support cellular respiration in plants and other organisms.
