Microanatomy of cells and tissues
Questions tagged [histology]
87 questions
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What is the morphological difference between Leydig cell in human and pig?
The pig is only an example, just an animal. Leydig cells have protein inclusions (Reinke crystals) that are mostly made of crystallised lipofuscin. They are secretory inclusions i.e. cells formed in secreting cells.
An example of Leydig cell in…
Léo Léopold Hertz 준영
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What histological stain can I use for beta-keratin?
I'm trying to find a histochemical stain for beta-keratin, the type found in Reptilia which is organized in beta-sheets. It's different than alpha-keratin which is found in mammalian skin, hair, nails, etc., and is formed of alpha-helices.
Simple…
kmm
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What is this small tissue structure found in kidney?
It's covered with white adipose tissue and it is smooth with reddish brown colour. HE dyed with dimensions 3 cm long and 1 cm wide. I'm guessing that this is a rare thing because I already checked pubmed etc. On the right is a closer picture of the…
Katariina J.
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Binucleate cells of transitional epithelium (bladder)?
Working through Histology slides of the transitional epithelium (urothelium) of the urinary bladder, I noticed that the dome-shaped cells at the top of the transitional epithelium are frequently binucleate.
In doing research, I found that the top…
jxs
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Why are there no Nissl bodies in the axon?
What could be the significance of not having Nissl bodies (endoplasmic reticulum) in the axon hillock (a part of the cyton) and axon? Does it have something to do with the processing of action potentials?
What prevents Nissl bodies from entering the…
JM97
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What fills the space between the alveoli in the lungs?
Do the lungs just consist of a large tree of alveoli, covered by the pleura, like this picture:
Or are they found "inside" the sac that is the lungs? If it's the later, what fills the space in-between the alveoli and forms the walls of the lung?
Dahen
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Can axons act as receptors?
In all histology books, it is stated that all sensory nerve endings (receptors) consist of dendrites that translate physical stimuli from the environment into neural signals. However, several sensory neurons seem to include axons, such as the merkel…
user4147
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Significance of basal lamina for outer layers of epithelium
In stratified (not pseudostratified) epithelia such as the epidermis, what purpose does the basal lamina serve for the outer layer cells which do not even stand in contact with it?
Also, how do these cells attach, all just through tight junctions to…
Armatus
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Why basement membrane thickens in diabetes mellitus?
Untreated diabetes mellitus may lead to blindness and kidney failure because the basement membrane of small blood vessels in these organs thickens due to increased production of collagen and laminin.
My questions : why are these organs most…
biogirl
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Isotropy of sarcomere bands in skeletal muscle cells
As seen under a polarization microscope, the A-Band in skeletal muscle fibres is so named because it is anisotropic in its refractive index which is a characteristic of orderly crystalline structure. On the other hand, the I-Band is so named because…
stochastic13
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Do adult mammalian cochlear inner hair cells regenerate?
The consensus seems to be no, but I see conflicting evidence.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5361427/
Supernumerary human hair cells—signs of regeneration or impaired development? A field emission scanning electron microscopy…
user61862
4
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is it possible to visualize coronavirus infection and what type of assays are routinely used?
There has been some electron micrograph of SARS-COV-2 published; but are there any fluorescent/ confocal-fluorescent image of them? or is it possible to do them? I know that viruses are usually much smaller than capacity of light microscope but I…
Always Confused
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What advantage does the pseudostratified epithelial structure type provide over squamous, cuboidal, and columnar?
I'm currently and have had difficulty receiving an answer about the role the pseudostratified columnar structure provides.
I understand that that the following have their respective advantages:
Cuboidal: Very tight cell junction
Columnar: Increased…
Paul Lemus
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Is it correct to use the terms multinucleate and syncitia interchangeably?
If you see the skeletal muscle,it is having several nuclei and is said to be "multinucleate".Similarly the cardiac muscle is also having several nuclei yet it is specifically termed"syncitial".So my question is: Is there any reason behind this or…
user 33690
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Tissue identification in vascular bundle sections
I always have trouble differentiating the tissues in a vascular bundle. I specially cannot properly identify the vascular cambium and phloem. I know xylem vessel elements are large cells with thicker cell walls, that makes them clearly different…
Taimur
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