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What are telodendria?

The neurons or the nerve cells are the fundamental units of the nervous system. The primary function of neurons is to transmit signals from one body part to another via electrical impulses. The main parts of a neuron include the cell body and the cell processes, which are divided into two types: axons and dendrites. At their extremities, axons excessively branch out into thin extensions called telodendria, also known as end branches. The protuberant ends of the telodendria, called axon terminals, form the junction between two neurons in synaptic contact.

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Who invented scientific notation?

In ancient Greece, the capital letter M referred to the number 10,000, and Archimedes developed a system of writing lower case Greek letters over the M to denote multiples of 10,000, states Arithmetic. Rene Descartes, working centuries later, developed the superscript method for notating exponents, allowing for the modern use of scientific notation, notes The Story of Mathematics.

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What causes the phases of the moon?

The moon itself does not actually change during its lunar phases, but its position around the Earth does. Sunlight always shines on and illuminates half of the moon; from Earth, only certain illuminated parts are visible, depending on the moon's position. Therefore, the same phase change appears to happen from the moon to the Earth, but in reverse. For example, the moon appears full from Earth when it is on the opposite side of the Earth from the Sun. From the moon, though, the Earth would appear to be in its new phase. This is due to the sun illuminating the half of the Earth opposite th..

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What does the appendicular region consist of?

The humerus is the long bone that makes up the arm, while the carpals are the bones of the wrist. The palm bones, called the metacarpals, are also among the forelimbs that make up the appendicular skeletal region. There are eight carpals, some of which include the trapezium, trapezoid, hamate, pisiform and lunate. The carpals are short, while the metacarpals, of which there are five, are long bones. Unlike the carpals, the metacarpals are assigned the numbers one through five instead of each having distinct names. The femur is the thigh bone, and it is both the strongest and the heaviest bone ..

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What happens when you hold your breath too long?

When the level of carbon dioxide becomes too high, painful contractions begin in the ribs and in the diaphragm. The pain is a signal that the person needs to exhale. The body and brain start to suffer from a lack of oxygen. The critical line refers to the moment when a person accumulates so much carbon dioxide in his body that he begins to feel pain. Hyperventilating is one way to delay the critical line moment, but hyperventilating is also dangerous, notes The Science Creative Quarterly. Hyperventilation can result in unconsciousness because it undermines the body's signals to breathe.\n..

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What is the M phase known as?

Mitosis, a form of cell division, is divided into four stages: prophase, metaphase, anaphase and telophase. These stages represent the cell's chromosomes differentiating from one another and dividing into two separate nuclei. Cytokinesis is when the cytoplasm of the cell divides, and it occurs during telophase and after the division of the nucleus. Interphase, which is when the cell grows and copies its genetic material, precedes mitosis.

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Would it be possible to have children on Mars?

Because Mars's gravity is different than Earth's, the biological processes involved in conception and fetal develop may operate differently on Mars than they do on Earth. On top of that, radiation levels on Mars are much different than on Earth because it lacks an atmosphere. As of 2015, scientists don't have enough data to know if these kinds of differences would interfere with a healthy adult woman's ability to conceive.

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What are the ingredients of chalk?

Natural chalk has been used in its raw form by artists for as long as humans have been etching cave walls. Sometimes impurities are found in the chalk bed, which lend various colors to the chalk. Commercial chalk is usually derived from natural chalk, but with various additives to enrich the color and give it greater strength.\nCommercial chalk, of the kind most often used in classrooms, is made from ground chalk powder that has been hydrated and mixed with clay for a firmer consistency. Dyes can be added to give the chalk a desired color. Black chalk, for example, usually contains carbon. Red..

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What is an example of a neutral mutation?

Changes in normal coloration are often neutral mutations. Heterochromia iridum, a condition in which the eyes are different colors, is a neutral mutation that occurs in several animal species. A similar neutral mutation in humans is red hair.\nThe most important characteristic of a neutral mutation is that it does not alter the survival of the organism but simply alters its appearance or structure in some way. Neutral mutations are the most frequently observed type of genetic mutation. However, because they have neither a positive or negative effect on the survival of the species, they tend to..

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What does the chromosomal theory of inheritance state?

A chromosome is a long, thread-like structure found in the nucleus of cells. It is primarily made up of a single coiled piece of DNA, which is the molecule that encodes the genetic instructions used for building and maintaining all of the structures of an organism. The Genetics Society of America explains that at the time of Sutton's theory, scientists already understood that traits were passed from parents to offspring according to certain patterns or rules.\nGregor Mendel's experiments with pea plants established many of the rules of heredity and they were widely accepted. At this ..

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