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Microscopes
Microscopes are used to look at things that are not visible to the naked eye. This category would demonstrate how microscopes work and information about different kinds of microscope.
4,322 Questions
Can you see protein with a light microscope?
No, proteins are too small to be seen with a light microscope. They are typically smaller than the wavelength of light used in a light microscope, which limits the resolution to structures larger than approximately 200 nanometers. To visualize proteins, techniques such as electron microscopy or fluorescence microscopy are used.
Can most pathogens be seen only with a microscope?
Yes. The word "pathogen" explicitly refers to a microorganism, virus, or bacteria.
What limits what you can see with the microscope?
The resolution of the microscope, which is determined by factors like the wavelength of light used and the numerical aperture of the lens, sets a limit on how small the details can be resolved. Additionally, the contrast between different structures in the sample can impact visibility, with stains or special techniques sometimes needed to enhance contrast. The sample itself may also present limitations, such as being too thick for light to pass through effectively.
Which organisms can only be seen with microscope?
Any organism that is too small to be seen by the naked eye must be seen through a microscope. These small organisms are called microorganisms. Bacteria and spermatozoa are examples of microorganisms that we can only view through a microscope.
Viruses are spread among the human population the same way bacterial infections are. Many viruses (but not all) are spread by infected people coughing and /or sneezing . If you come into contact with the nasal droplets or mucous the virus can be passed from one host to another. Viruses can be passed on by touching or shaking hands with another person who has the virus .If an infected person touches an item such as a food , a door knob or tap etc and you touch it too a virus can be transmitted to you.This is why washing hands is so important. Sneezing or coughing into your elbow or into a cloth you then dispose of rather than into you hands reduces transmission .
Viruses that cause diarrhoea can be deadly . It is possible to contaminate food with viruses if you fail to wash your hands adequately after toileting . Dirty hands make it possible for harmful viruses (or bacteria ) from the intestine to spread.
Body fluids, such as blood, saliva and semen, can contain viruses. The transmission of such fluids by injection or sexual contact and even kissing pass on viruses like AIDS ,Herpes or Hepatitus.
Viruses are microscopic and can't be seen by the naked eye. They can bee seen by electron Microscopes .They can't multiply on their own and they need to invade living organisms to make more virus particles. Human beings are the perfect social animal to spread Viruses and as we travel widely a virus can be spead across the world in a matter of days (sometimes hours). However not all viruses can be spread by humans or make human beings ill. Some virus are harmless or only infect other species.
Some virus particles can lay dormant for years trapped by ice or in soil. If accidentally ingested or inhaled the Virus can become active again even after thousands of years.
Viruses consist of genetic materials (DNA or RNA) . They are surrounded by a protective coat of protein. They have a special mechanism which makes them capable of latching onto cells and getting inside them where they then begin to duplicate.The cell becomes a virus making factory.
The cells of the mucous membranes in the lungs or nose are particularly vulnerable to virus attacks because they are not covered by protective skin. Entry by an open wound is also possible.
What are the characteristics of the image formed by simple microscope?
The image formed by a simple microscope is virtual, upright, and magnified. It is formed by the lens of the microscope and is viewed through the eyepiece. The image may appear slightly distorted towards the edges due to aberrations in the lens.
What do the stage controls do on a microscope?
The stage controls on a microscope are used to move the specimen slide horizontally or vertically to adjust its position relative to the objective lens. This allows you to focus on different areas of the specimen and also to scan across it to observe different parts.
How would be able to distinguish parts of the organism using the microscope?
Using high power objective lense
How is a hair or fiber measured with a compound microscope?
A hair or fiber is measured with a compound microscope by placing the sample on a glass slide and using the microscope's magnification to view the object. A stage micrometer with known markings is used as a reference to calibrate the microscope's measurements. By comparing the size of the sample to the stage micrometer, the dimensions of the hair or fiber can be accurately determined.
What you can observe under the microscope the epithelial?
Under the microscope, epithelial cells appear as closely packed layers of cells, covering the surface of organs and body cavities. They typically have a distinct, uniform shape and size, with a clear nucleus visible in each cell. The arrangement and structure of epithelial cells can vary depending on the specific type of epithelium being observed (e.g., squamous, cuboidal, columnar).
What is it that deals with body structures seen without a microscope?
Macroscopic anatomy, also known as gross anatomy, deals with studying body structures that are visible to the naked eye without the need for a microscope. This includes organs, tissues, and systems of the body.
What does the muscle tissue look like under the skin?
Muscle tissue under the skin appears as firm, often striated (striped) tissue with a reddish or pink hue due to blood flow. The thickness and definition of the muscle can vary depending on individual muscle development and body composition.
Why do you call the microscope a compound light microscope?
A compound light microscope is named so because it uses multiple lenses (compound) to magnify the specimen, and it relies on light to illuminate the sample for viewing. The term "compound" refers to the use of multiple lenses in the system for higher magnification power compared to simple microscopes.
A light microscope, also known as a brightfield microscope, passes light through a transparent or thinly sliced specimen to generate a true-color view of cells. It is commonly used in laboratories for observing biological samples at a cellular level.
What is magnification range of dissecting microscope?
The magnification range of a dissecting microscope typically ranges from 5x to 80x, although some models may go up to 100x.
What is the structure of cellreceptors as seen by light microscope?
Cell receptors are typically membrane-bound proteins that span the cell membrane. They have a specific 3D structure that allows them to bind specific ligands or signaling molecules. However, their actual visualization using a light microscope may be limited due to their small size (~1-10 nm) and the resolution of the microscope.
Pulling the stained material apart with needles helps to reduce overlapping of tissue sections, allows for better visualization of individual cells or structures, and prevents bubbles from forming under the cover slip during mounting. This process enhances the clarity and quality of the microscopic image.
What is the similarities of compound microscope to dissecting microscope?
Both the compound microscope and dissecting microscope use lenses to magnify objects. They both have adjustable focus and are used for viewing specimens in detail, but the compound microscope is more powerful and used for viewing smaller specimens at a cellular level, while the dissecting microscope is used for larger specimens at a lower magnification.
What type of microscope is used to examine bacteria?
A light microscope is commonly used to examine bacteria. However, an electron microscope can also be used for higher magnification and resolution to observe bacteria in more detail.
What is too small to be seen with a ornanary microscope?
Atoms and individual molecules are too small to be seen with an ordinary microscope due to their size being much smaller than the wavelength of visible light. These tiny particles require specialized tools like electron microscopes for visualization.
A thin tissue allows light to pass through it easily, leading to clearer and sharper images when viewed under a compound light microscope. Thicker samples can scatter light, reducing image quality and making it difficult to observe cellular details. A thin sample also ensures that all parts of the tissue are in the same focal plane, preventing distortion and blurriness.
Who contributed to the development of the microscope and how?
Antonie van Leeuwenhoek is credited with making significant contributions to the development of the microscope in the 17th century. He designed a simple single-lens microscope that allowed him to observe and document microorganisms for the first time. Leewenhoek's meticulous observations helped lay the foundation for the field of microbiology.
Why did cell burst on glass slide under microscope?
The cell likely burst on the glass slide due to mechanical stress or pressure when being mounted onto the slide. Cells are delicate and can be easily damaged if they are handled too roughly or subjected to excessive force. Ensuring gentle handling and proper mounting techniques can help prevent cell bursting on glass slides.
Can protists be seen with a compound microscope?
Yes, protists can be seen with a compound microscope as they are typically microscopic in size. Many protists, such as amoebas and paramecia, are within the resolution capabilities of a compound microscope, allowing them to be studied and observed at the cellular level.
