What type of transport does not require energy? Key terms Term Meaning Passive transport Type of transport that does not require energy to occur Concentration gradient A region of space over which the concentration of a substance changes Permeability The quality of a membrane that allows substances to pass through it What are the three […]
Can force be distributed?
Can force be distributed? A distributed force is any force where the point of application of the force is an area or a volume. Distributed forces can be broken down into surface forces and body forces. Surface forces are distributed forces where the point of application is an area (a surface on the body). What […]
What is the process of reuptake in neurotransmitters?
What is the process of reuptake in neurotransmitters? Reuptake is essentially a process to recycle neurotransmitters in which active processes exist within nerve terminals to reabsorb the released neurotransmitter. What neurotransmitter regulates mood? Serotonin is an inhibitory neurotransmitter. It helps regulate mood, appetite, blood clotting, sleep, and the body’s circadian rhythm. Serotonin plays a role […]
Are blue eyes a mutation?
Are blue eyes a mutation? People with blue eyes have a single, common ancestor, according to new research. A team of scientists has tracked down a genetic mutation that leads to blue eyes. The mutation affected the so-called OCA2 gene, which is involved in the production of melanin, the pigment that gives color to our […]
Why do we need to protect ecosystems?
Why do we need to protect ecosystems? Healthy ecosystems clean our water, purify our air, maintain our soil, regulate the climate, recycle nutrients and provide us with food. They provide raw materials and resources for medicines and other purposes. They are at the foundation of all civilisation and sustain our economies. How can we protect […]
What are two ways in which ATP is produced in the cells?
What are two ways in which ATP is produced in the cells? It consists of a series of stages, beginning in the cell cytoplasm and moving to the mitochondria, the “power plants” of eukaryotic cells. The two ATP-producing processes can be viewed as glycolysis (the anaerobic part) followed by aerobic respiration (the oxygen-requiring part). What […]
What are inductors and capacitors used for?
What are inductors and capacitors used for? Capacitors and inductors are electronic components that can store energy supplied by a voltage source. A capacitor stores energy in an electric field; an inductor stores energy in a magnetic field. How are capacitors and inductors used together? Inductors that share the magnetic path are combined together and […]
When was the solar system formed?
What is the distance a screw thread advances axially in one turn called?
What is the distance a screw thread advances axially in one turn called? Lead What are the different types of screw threads? Clamp screws come in many forms. There are Standard threads, ACME threads, Buttress threads, and Square threads. Each of these threads may be used in clamps and vises for different reasons. What are […]
Which wave is harmful?
Which wave is harmful? The most dangerous frequencies of electromagnetic energy are X-rays, gamma rays, ultraviolet light and microwaves. X-rays, gamma rays and UV light can damage living tissues, and microwaves can cook them. What color can humans not see? Red-green and yellow-blue are the so-called “forbidden colors.” Composed of pairs of hues whose light […]