Hormone production and release are primarily controlled by negative feedback. In negative feedback systems, a stimulus elicits the release of a substance; once the substance reaches a certain level, it sends a signal that stops further release of the substance. …
Pressure, the effect of a force applied to a surface, is a derived unit. The unit of pressure in the SI system is the Pascal (Pa), defined as the force of one newton per square meter.
According to Huygens’s principle, every point on a wavefront is a source of wavelets that spread out in the forward direction at the same speed as the wave itself. The new wavefront is tangent to all of the wavelets. A …
Kidneys filter blood in a three-step process. First, the nephrons filter blood that runs through the capillary network in the glomerulus. Almost all solutes, except for proteins, are filtered out into the glomerulus by a process called glomerular filtration. Second, …
A stem cell is a cell with the unique ability to develop into specialized cell types in the body. In the future, they may be used to replace cells and tissues that have been damaged or lost due to disease. …
In this example, the chlorine gas (Cl2Cl2) gains two electrons, bringing the oxidation state of 0 to an oxidation state of chloride ions to be -1. The charge here reduced, meaning this is a reduction half-reaction, NOT an oxidation reaction. …
A steady electric current produces a magnetic field that is constant in time and which does not propagate as a wave. Accelerating charges, however, produce electromagnetic waves. An electric charge oscillating up and down, or an alternating current or flow …
There are essentially two kinds of ecosystems; Aquatic and Terrestrial. Any other sub-ecosystem falls under one of these two headings. Terrestrial ecosystems Terrestrial ecosystems can be found anywhere apart from heavily saturated places. They are broadly classed into: The Forest …
The mixing of bleaching powder (hypochlorite powder) with baking soda improves the cleaning characteristics of the compound. By mixing baking soda with bleach, it gives much cleaner clothes.
The average ac power is found by multiplying the rms values of current and voltage. Ohm’s law for the rms ac is found by dividing the rms voltage by the impedance. In an ac circuit, there is a phase angle …