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Plate in Biological Definition

Chromatography

... Chromatography theory 2.1 Retention 2.2 plate theory 3 Paper chromatography 4 Thin ... There are two theories of chromatography, the plate and rate theories. Retention The ... under absolutely identical conditions. plate theory ...

Muscle

... pyramidal tract to the spinal cord and from there to the motor end plate at the muscles. Along the way, feedback loops such as that of the ... disease to Creutzfeldt-Jakob disease . Diseases of the motor end plate include myasthenia gravis , a form of muscle weakness due to antibodies ...

Neural plate

... The neural plate is thick and flat bundle of ectoderm which develops in the embryo into the nervous system . In the development sequence, the neural plate forms the neural tube which then forms the CNS ( central nervous system ...

Apoptosis

... selective apoptosis, sculpts developing tissues in vertebrates. During vertebrate embryo development, structures called the notochord and the floor plate secrete a gradient of the signaling molecule Sonic hedgehog (Shh), and it is this gradient that directs cells to form patterns in the embryonic ...

Bone

... body of the bone; region of primary ossification Epiphysis the end regions of the bone; regions of secondary ossification Epiphyseal plate the thin sheet of bone marking the fusion of epiphyses to the diaphysis (adults only) Head the proximal articular end of the bone ...

Cartilage

... cartilage) is degraded, resulting in limitation of movement and pain. Achondroplasia : Reduced proliferation of chondrocytes in the epiphyseal plate of long bones results in a form of dwarfism . Costochondritis : Inflammation of cartilage in the ribs which causes chest pain Herniated disk ...

Metaphase

... daughter cells. One of the cell cycle "checkpoints " occurs during metaphase. Only after all chromosomes have become aligned at the metaphase plate does the cell enter anaphase . This is accomplished by regulation of the APC, securin, and separase. Metaphase is preceded by prophase and ...

Microbiology

... colonies from their specific locations on one agar-filled petri dish to analogous locations on several other petri dishes. After replicating a plate of E. coli , they exposed each of the new plates to a bacteriophage (also called phage). They observed that phage-resistant colonies were present ...

Microscope

... is a microscope that uses only one lens for magnification. Van Leeuwenhoek 's microscopes consisted of a single, small, convex lens mounted on a plate with a mechanism to hold the material to be examined (the sample or specimen). This use of a single, convex lens to magnify objects for viewing is ...

Mitosis

... are attached to microtubules emanating from each centriole - they line up in the middle of the spindle, forming what is called the metaphase plate . This does not occur in every organism - in some cases chromosomes move back and forth between the centrioles randomly, only roughly lining up along ...

Neural tube

... of an invagination of the ectoderm following gastrulation . This process is induced by signaling molecules produced in the notochord and basal plate . Neural tube defects Normally the closure of the neural tube occurs around the 30th day after fertilization . However, if something ...

Mitosis

... are attached to microtubules emanating from each centriole - they line up in the middle of the spindle, forming what is called the metaphase plate . This does not occur in every organism - in some cases chromosomes move back and forth between the centrioles randomly, only roughly lining up along ...

Virus

... Marburg , first discovered in 1967 in Marburg Germany, and ebola . Filovirus are long, worm-like virus particles that, in large groups, resemble a plate of noodles. Marburg virus has infected humans in 35 documented cases, killing seven. There are four types of ebola: Ebola-Ivory coast, Ebola-Sudan, ...
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