Which statement about the microscopic anatomy of skeletal muscle fibers? Which statement about the microscopic anatomy of skeletal muscle fibers is true? Muscle fibers are continuous from tendon to tendon, Tubular extensions of the sarcolemma penetrate the fiber transversely, Cross striations result from the lateral alignment of thick and thin filaments, Each fiber has many nuclei.
What is the microscopic structure of skeletal muscle? Skeletal muscle fibers are long, multinucleated cells. The membrane of the cell is the sarcolemma; the cytoplasm of the cell is the sarcoplasm. The sarcoplasmic reticulum (SR) is a form of endoplasmic reticulum. Muscle fibers are composed of myofibrils which are composed of sarcomeres linked in series.
What is the microscopic appearance of skeletal muscle tissue? Skeletal muscles are long and cylindrical in appearance; when viewed under a microscope, skeletal muscle tissue has a striped or striated appearance. The striations are caused by the regular arrangement of contractile proteins (actin and myosin).
What are the characteristics of skeletal muscle fibers? Four characteristics define skeletal muscle tissue cells: they are voluntary, striated, not branched, and multinucleated.
Which statement about the microscopic anatomy of skeletal muscle fibers? – Related Questions
How to use usb digital microscope?
Plug the device into any open USB port on the computer or the television. Hold the microscope and lightly touch the lens to the specimen. The image should now be visible on the monitor or television screen. These microscopes should only be used to examine dry specimens.
Are lice eggs microscopic?
Nits are lice eggs that attach to the hair shaft and usually hatch within a week. The microscopic eggs are easy to mistake for dandruff or residue from hair styling products. Once the eggs hatch, lice are known as nymphs, an immature form of the parasite that is grayish tan in color.
What did robert hooke study under the microscope?
While observing cork through his microscope, Hooke saw tiny boxlike cavities, which he illustrated and described as cells. He had discovered plant cells! Hooke’s discovery led to the understanding of cells as the smallest units of life—the foundation of cell theory.
Are any animals microscopic?
Micro-animals are animals so small that they can only be visually observed under a microscope. … Microscopic arthropods, including dust mites, spider mites, and some crustaceans such as copepods and certain cladocera.
What is the function of the scanner on a microscope?
The name “scanning” objective lens comes from the fact that they provide observers with about enough magnification for a good overview of the slide, essentially a “scan” of the slide.
What can you see in microscope?
A microscope is an instrument that is used to magnify small objects. Some microscopes can even be used to observe an object at the cellular level, allowing scientists to see the shape of a cell, its nucleus, mitochondria, and other organelles.
Which of the following describes proper microscope care and technique?
Which of the following describes proper microscope care and technique. Be sure to carry the microscope upright, with one hand on the arm and the other under the base. To protect the optics of the microscope, place it down gently and don’t drag it across the tabletop.
How do you measure cells under a microscope?
Divide the number of cells in view with the diameter of the field of view to figure the estimated length of the cell. If the number of cells is 50 and the diameter you are observing is 5 millimeters in length, then one cell is 0.1 millimeter long. Measured in microns, the cell would be 1,000 microns in length.
How small can we with electron microscope?
Light microscopes let us look at objects as long as a millimetre (10-3 m) and as small as 0.2 micrometres (0.2 thousands of a millimetre or 2 x 10-7 m), whereas the most powerful electron microscopes allow us to see objects as small as an atom (about one ten-millionth of a millimetre or 1 angstrom or 10-10 m).
What is the meaning of the medical term microscopic?
Microscopic: An object so small it cannot be seen without the aid of microscope (for example, bacteria and viruses).
What does a polarizing microscope do?
The polarized light microscope is designed to observe and photograph specimens that are visible primarily due to their optically anisotropic character.
Where are stereo microscopes used?
The stereo microscope is often used to study the surfaces of solid specimens or to carry out close work such as dissection, microsurgery, watch-making, circuit board manufacture or inspection, and fracture surfaces as in fractography and forensic engineering.
What microscope to see phage?
Transmission electron microscopy has provided the basis for the recognition and establishment of bacteriophage families and is one of the essential criteria to classify novel viruses into families. It allows for instant diagnosis and is thus the fastest diagnostic technique in virology.
Why is the image inverted in a compound microscope?
The eyepiece of the microscope contains a 10x magnifying lens, so the 10x objective lens actually magnifies 100 times and the 40x objective lens magnifies 400 times. There are also mirrors in the microscope, which cause images to appear upside down and backwards.
Can microscopic colitis cause joint pain?
Other symptoms of microscopic colitis could include fever, joint pain, and fatigue. 4 These symptoms may be a result of the inflammatory process that is part of an autoimmune or immune-mediated disease.
Why is oil added to microscope slide?
In light microscopy, oil immersion is a technique used to increase the resolving power of a microscope. This is achieved by immersing both the objective lens and the specimen in a transparent oil of high refractive index, thereby increasing the numerical aperture of the objective lens.
When would you use an electron microscope?
Electron microscopes are used to investigate the ultrastructure of a wide range of biological and inorganic specimens including microorganisms, cells, large molecules, biopsy samples, metals, and crystals. Industrially, electron microscopes are often used for quality control and failure analysis.
What are the illuminating parts of the microscope?
It consists of mainly three parts: Mechanical part – base, c-shaped arm and stage. Magnifying part – objective lens and ocular lens. Illuminating part – sub stage condenser, iris diaphragm, light source.
What is the most expensive microscope?
Lawrence Berkeley National Labs just turned on a $27 million electron microscope. Its ability to make images to a resolution of half the width of a hydrogen atom makes it the most powerful microscope in the world.
How do microscopes produce magnified images?
A compound microscope uses two or more lenses to produce a magnified image of an object, known as a specimen, placed on a slide (a piece of glass) at the base. … By raising and lowering the stage, you move the lenses closer to or further away from the object you’re examining, adjusting the focus of the image you see.
What is the relationship between the microscopic animals and plants?
Herbivory is an interaction in which a plant or portions of the plant are consumed by an animal. At the microscopic scale, herbivory includes the bacteria and fungi that cause disease as they feed on plant tissue. Microbes that break down dead plant tissue are also specialized herbivores.