The communication between the neurons and their target cells was unknown until the discovery of their electrical activity. It has been found that signal transmission from neurons to target cells happens due to action potential. An action potential is a sudden rise and fall in membrane voltage or potential of a neuron in response to a stimulus. It is a temporary shift in the neuron’s resting membrane potential when it sends information down the axon away from the cell body....
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What is a Cell Membrane The cell membrane, also called the plasma membrane, is a thin layer that surrounds the cytoplasm of all prokaryotic and eukaryotic cells, including plant and animal cells. It is a selectively permeable cell organelle,allowing certain substances inside the cell while preventing others to pass through and thus is analogous to a barrier or gatekeeper in their function. It also serves as the site of attachment for the cytoskeleton that helps to provide shape and support to the cell....
Compressive stress is the force per unit area applied to an object that causes it to become shorter or more compact. It occurs when a material is subjected to squeezing forces that push inward from opposite directions. This is different from tensile stress, which occurs when forces pull a material apart, stretching it instead of compressing it. For example, when you press both ends of a sponge together, the sponge shrinks in size....
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All life on earth relies on nitrogen, recycled through the global nitrogen cycle. Denitrification is the final step in the nitrogen cycle. The nitrogen fixed through nitrogen fixation is returned to the atmosphere as nitrogen gas. Thus, it helps to balance the amount of nitrogen in the ecosystems. Denitrification What is Denitrification Denitrification is the biological process of sequential reduction of nitrogen oxides in the form of nitrate (NO 3 – ) and nitrite (NO 2 – ) to nitrogen-containing gases like nitric oxide (NO), nitrous oxide (N 2 O), and finally forming dinitrogen (N 2 )....
Once you have learned about the different layers of the Earth, a nice and easy way to help you remember their names and order might be useful. Find below some PDF worksheets that you can print out and practice on. Suitable for: Grade 5, Grade 6, Grade 7 Layers of the Earth Worksheet Download PDF Earth’s Interior Worksheet Download PDF Suitable for: Grade 6, Grade 7 Structure of the Earth Worksheet...
Thanks! I was thinking about seed germination and realized I knew very little about seeds and thought to look it up!
Radiant flux represents the total amount of radiation energy, including visible light, infrared, and ultraviolet, emitted, reflected, transmitted, or received by a surface or object per unit time. It measures the rate at which electromagnetic waves radiate or transfer energy, thereby calculating the power of light or electromagnetic radiation. Imagine someone standing in the sunlight on a sunny day. The sunlight they feel on their skin is carrying energy. The amount of this energy hitting each square meter of their skin every second is the radiant flux....
Definition: What is Reflection? Reflection is a phenomenon in which a wave traveling through a medium reflects at the interface of another medium. In optics, reflection takes place when light is incident at the interface of the two media. The ray of light returns to the first medium without any change in velocity. Reflection Example Examples of Reflection Light is reflected from an object reaches our eyes allowing us to see the object A mirror reflects light from an object reaches our eyes, thus allowing us to see the object through the mirror Reflection takes place in a plane mirror, concave mirror, and convex mirror....
What is Simple Diffusion and Facilitated Diffusion Both simple diffusion and facilitated diffusion are passive transport processes that are vital to every cell in our body. Although they share some similar basic properties, their mode of operation differs in many aspects. How does Simple Diffusion Differ from Facilitated Diffusion Simple Diffusion vs Facilitated Diffusion What Characteristics do Simple Diffusion and Facilitated Diffusion share In both the processes, the molecules move from a region of their high concentration to a region of low concentration, i....
The movement of substances (ions and molecules) across the cell membrane is called cell transport. The most important feature of the cell membrane is that they are selectively permeable, meaning they allow specific substances to pass through while preventing others. This feature is extremely critical for maintaining a proper internal environment within the cell to keep them alive and remain functional. The cell membrane is selectively permeable due to its molecular makeup....
Superconductivity is a phenomenon observed in certain materials called superconductors. When cooled below a certain temperature, they exhibit zero electrical resistance and expulsion magnetic fields. They are divided into two main categories: Type I and Type II superconductors, each with distinct characteristics and behaviors. Types I Superconductors Type I superconductors are materials that can conduct electricity without any resistance when they are cooled below a certain temperature, known as critical temperature....
Water pollution is contaminating water bodies such as oceans, seas, lakes, rivers, groundwater, and aquifers with pollutants. It is the most prevalent type of pollution after air pollution. Generally, water pollution can happen from either point or non-point sources. When contamination originates from a single source, it is called point source pollution. Wastewater discharge into the bodies is an example of such type of pollution. In contrast, non-point source of pollution, like agricultural runoff, occurs from diffuse sources....
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Most life on Earth relies on sunlight as their primary energy source to make their own food by photosynthesis . However, in deep-subsurface ecosystems such as hydrothermal vents where sunlight is absent, organisms use a completely different process known as chemosynthesis to produce their food. What is Chemosynthesis Chemosynthesis is the process by which specific microorganisms prepare food (glucose) using inorganic substances without sunlight. They rely on the oxidation of sulfur, hydrogen, hydrogen sulfide, and methane for their energy source....
Now that you have learned the different types of clouds, test your knowledge by solving the worksheets given below. They will help to clear your concept better. Suitable for : Grade 4, Grade 5 4 Types of Clouds Worksheets Download PDF Cloud Worksheet for 1st Grade Download PDF Cloud Worksheets for 3rd Grade Download PDF Clouds Worksheet Download PDF Three Types of Clouds Worksheet Download PDF Types of Clouds Worksheet Printable...
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Eddy currents are loops of electrical current produced in a conductor due to a changing magnetic field or relative motion of the conductor inside a magnetic field. They flow in a plane perpendicular to the direction of the magnetic field. Because they resemble swirling eddies in turbulent water, they are called eddy currents. Due to Faraday’s law of electromagnetic induction, Eddy currents produce their magnetic field. According to Lenz’s law, the current direction is such that it will oppose the magnetic field causing it....
What is Exocytosis Exocytosis is the natural process of transporting molecules from within a cell to the outside space. In this process, the vesicles containing the fluid enclosed by a lipid bilayer fuse with the plasma membrane to release their contents outside the cell. The term ‘exocytosis’ was proposed by De Duve in 1963. Examples of Cells Where Exocytosis Happens It occurs in all living cells, from invertebrates and protozoa to plants and human....
