Minute ventilation refers to the amount of air, in liters, that a person breathes per minute. It is found by multiplying respiratory rate and tidal volume. This is an important factor anesthesiologists consider when a patient is having surgery.
A person's minute ventilation can increase or decrease based on whether or not he is stressed, exercising or participating in other strenuous activities. An increase in ventilation is the result of an increase in a demand for oxygen combined with an increase in the production of carbon dioxide. A decrease is the result of a decrease in oxygen demand and carbon dioxide production.Learn More
Adrenaline, a natural stimulant created in the kidney's adrenal gland, travels through the bloodstream and controls functions of the autonomous nervous system, including the secretion of saliva and sweat, heart rate and pupil dilation. The substance also plays a key role in the human flight-or-flight response.Full Answer >
The function of the mucilaginous sheath of blue-green algae is to bind colonies together and to permit movement. The mechanism of this movement is not fully understood. The mucilaginous sheath is made of strands of cellulose and often bears pigments that give colonies of blue-green algae distinct colors.Full Answer >
Artificial embryo twinning is a method of making clones that mimics the natural process of creating identical twins, according to the Genetic Science Learning Center. It uses the same approach as natural cloning, but it is performed in a Petri dish rather than inside the mother.Full Answer >
Organisms have the ability to adapt to specific conditions within their environments through the biological process of variation, which enhance organisms' chances of survival. Variation is essentially a form of natural selection that takes place during long periods of time. Through the process of evolution, organisms retain the strongest traits and features that allow them to breed, find food, and survive in certain habitats.Full Answer >