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Showing posts from January, 2021

Comparison between tract and nerve

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  Comparison between tract and nerve Nerve Nerve contain bundle of axons (nerve fibers) in the peripheral nervous system (PNS) that transmits signals between the central nervous system (CNS) and other parts of the body. It is the most important part of peripheral nervous system Location: Peripheral nervous system. Structure: Made of axons, connective tissue layers (endoneurium: axon is surrounded by it , perineurium: bundle of axons are surrounded by it, epineurium: whole nerve trunk is surrounded by it), and blood vessels. It gets myelination by Schwann cell   Function: Carries sensory signals to the CNS (afferent) from peripheral part of body or motor signals carry from from the CNS (efferent) to target organs like skeletal muscle, cardiac muscle, smooth muscle or glands Example: Sciatic nerve, median nerve, except optic nerve (though optic nerve is technically part of CNS in develop...
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Difference between haematogenous osteomylitis in infant , children and adult

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Difference between haematogenous osteomylitis in infant , children and adult Features Infant Child Adult Localization Metaphyseal with epiphyseal extension Metaphyseal Epiphyseal Involucrum Common Common Not common Sequestration Common Common Not common Joint involvement Common Not common Common Soft tissue abscess Common Common Not common Pathological fracture Not common Not common Common* Fistulas Not common Variable Common    
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Difference between autosome and sex chromosome

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  Difference between autosome and sex chromosome Autosome Sex chromosome Autosomes:  Autosomes determine the trait. Males and females contain the same copy of autosomes.   Sex..chromosomes:  Sex..chromosomes determine the gender. They are different in males and females by their size, form, and behavior. Autosomes are labeled with numbers, from 1 to 22 Sex chromosomes are labeled with letters as XY, ZW, XO and ZO. Most of the chromosomes within a genome are autosome A few of the chromosomes within a genome are sex chromosomes. The 22 pairs of autosomes are homologous in humans   Female sex chromosomes (XX) are homologous (homomorphic) while male sex chromosomes (XY) are non-homologous (heteromorphic). Since autosomes are homomorphic, the position of the centromere is identical.   Since the male se...
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Difference between transcription and translation

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  Difference between transcription and translation Topic Transcription Translation Definition It is a process whereby information is transmitted from DNA to the mRNA It is a process of translating information from mRNA into protein synthesis Purpose The purpose of  transcription  is to make RNA copies of individual genes that the cell can use in the biochemistry. The purpose of translation is to synthesize proteins, which are used for millions of cellular functions. Products mRNA, tRNA, rRNA and non-coding RNA( like microRNA) Proteins Product processing A 5’ cap is added, a 3’ poly A tail is added and introns are spliced out. A number of post-translational modifications occur including phosphorylation, SUMOylation, disulfide bridges and farnesylation. Location Nucleus ...
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