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Why is FEV1 low in asthmatics?
In asthmatics, the airways become narrowed due to inflammation and constriction of the smooth muscles around the airways. This leads to difficulty in exhaling air from the lungs, resulting in a lower FEV1 (forced expiratory volume in 1 second) value. Additionally, increased mucus production in the airways can further contribute to decreased airflow and lower FEV1 measurements in asthmatics.
Clinical importance of the FVC and FEV1 values?
Forced Vital Capacity (FVC) and Forced Expiratory Volume in 1 second (FEV1) are important lung function tests that help diagnose and monitor conditions like asthma, COPD, and other respiratory diseases. They provide information on the overall lung health, ability to move air in and out of the lungs, and help determine the severity of lung diseases and track how well treatment is working. Abnormal values can indicate obstruction (low FEV1/FVC ratio) or restriction (low FVC), guiding healthcare providers in making appropriate treatment decisions.
What causes low pcv in blood?
PCV is the volume percentage of red blood cells in a mammals blood. When one's PCV is low, the cause is generally anemia.
Why does high volume and low mass equal low density?
High volume and low mass result in low density because density is calculated by dividing mass by volume. When the mass is low compared to the volume, the density will also be low because there is less mass per unit of volume.
Why is residual volume important?
Residual Volume (rv) is important because it prevents the lungs from collapsing. It also prevents the inside surfaces of the lungs touching, thus creating friction. It also prevents the inner surfaces of the lungs sticking together. Another reason why we have a residual volume is that gaseous exchange is continuously occurring so after we have expelled as much air as possible (expiratory reserve volume) gaseous exchange is still occurring. Residual volume can be shown in this equation: residual volume = inspiratory reserve volume - tidal volume - expiratory reserve volume for an average person residual volume will be around 1 to 1.5 litres. Sports Science student
What is low blood volume called?
Low blood volume will cause low blood pressure, high heart rate as the heart tries to compensate. Eventually if the volume is low enough the person will go into hypovolemic shock.
An object with high volume and low mass has?
1. It has more gravitational force exerted on other objects 2. It holds more energy than smaller objects
Is a characteristic of a white dwarf star low dencity low volume very bright very hot verycool?
Low volume, and very hot.
What causes low minute volume alarms?
A change in respiratory rate or tidal volume.... meaning, respiratory rate decreases, maybe becomes apneic, or the tidal volume decreases...or maybe BOTH. Also, a circuit disconnect!
What causes you to be low on iron and low on blood?
Low iron is most often simply due to low intake in the diet. Other than this, it may be low due to excessive iron loss, which can in turn be caused by blood loss e.g. due to menstruation. Being "low on blood", i.e. a low total blood volume can have entirely different causes. On the one hand, this can also be due to excessive blood loss, though this would require a large wound. On the other hand however, defects in the kidney's water retention mechanisms can lead to excessive loss of water in the urine and thereby reduction of the blood volume (and consequently increase in blood concentration).
How do crackers float?
it has a low volume
Is periodic inventory system used most by companies that sell low or high volume merchandise?
high volume, low cost
