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Biology

What are two types of variables in a controlled experiment?

What are two types of variables in a controlled experiment? In a controlled experiment, an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. Is GPA a dependent or independent variable? Therefore the high school GPA is the independent variable called x, while the […]

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What is the pressure in the lungs during expiration?

What is the pressure in the lungs during expiration? During expiration, the opposite change occurs. The lung alveoli collapse before air is expelled from them. The alveolar pressure rises to about +1 cmH2O. This forces the 500 ml of inspired air out of the lung during the 2–3 seconds of expiration. What pressure should be […]

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Which superficial vein of the lower limb runs along the posterior leg before draining into the popliteal vein?

Which superficial vein of the lower limb runs along the posterior leg before draining into the popliteal vein? These veins combine to form the posterior tibial and fibular veins. The posterior tibial vein accompanies the posterior tibial artery, entering the leg posteriorly to the medial malleolus. On the posterior surface of the knee, the anterior […]

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What are steroids used for?

What are steroids used for? Steroids are used to treat a variety of conditions in which the body’s defense system malfunctions and causes tissue damage. Steroids are used as the main treatment for certain inflammatory conditions, such as systemic vasculitis (inflammation of blood vessels) and myositis (inflammation of muscle). Why would a doctor give you […]

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What hormone is released during short term stress?

What hormone is released during short term stress? Short-Term Stress Response The hormones epinephrine (also known as adrenaline) and norepinephrine (also known as noradrenaline) are released by the adrenal medulla. What are the stress hormones related to the stress response? Cortisol, the primary stress hormone, increases sugars (glucose) in the bloodstream, enhances your brain’s use […]

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What are the benefits of therapeutic cloning?

What are the benefits of therapeutic cloning? List of Therapeutic Cloning Pros It has the potential to create organs. Tissue rejection is no longer a threat. It may help to treat genetic diseases. Donor items would no longer be necessary. It could lead to organ regeneration. It can act as a preventative treatment. What cells […]

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What is substrate in fermentation?

What is substrate in fermentation? During fermentation, pyruvate is metabolised to various compounds. Sugars are the most common substrate of fermentation, and typical examples of fermentation products are ethanol, lactic acid, lactose, and hydrogen. However, more exotic compounds can be produced by fermentation, such as butyric acid and acetone. What two main types of by […]

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What is the formula for Mg3 PO4 2?

What is the formula for Mg3 PO4 2? Mg3(PO4)2 Is Mg3 PO4 2 an ionic compound? Magnesium phosphate is Mg3(PO4)2. Okay, onto how I found that: Magnesium phosphate is an ionic compound, because firstly, there is no numerical prefix on the second word of the name, so we know it is not a covalent compound. […]

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What is the role of pollen tube?

What is the role of pollen tube? In angiosperms, the pollen tube is siphonogamous and its main function is to carry the male gametes for double fertilization. During post-fertilization development of the ovule, a portion of the tube may persist in the micropyle, or in the embryo sac, or in both, sometimes even in the […]

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