Name Chapter 2--Cell Physiology Description Instructions Modify Add Question Here Question 1 Multiple Choice 0 points Modify Remove Question Which component below is not always found in a typical human cell? Answer cytosol DNA flagellum plasma membrane water Add Question Here Question 2 Multiple Choice 0 points Modify Remove Question A typical human cell is about ____ micrometers in diameter. Answer 1 to 2 10 to 20 80 to 100 150 to 200 200 to 300 Add Question
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different types of fibers‚ microtubules‚ microfilaments and intermediate filaments. Microtubules are the thickest of the three fibers‚ making up the cytoskeleton‚ it is a straight hollow tube made of globular proteins called tubulins. It gives structure and movement of cilia and flagella. Microfilaments are the thinnest of the three filaments; they are solid rods and are active in muscle contraction. Intermediate filaments provide support for microfilaments and microtubules by holding them in place
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POB II: Exam II Review Chapter 6: tour of the cell Microscopy: • Microscopes provide a window to the cell. • Most important tool in cytology • Resolution has improved understanding of cells. o Resolving power – the smallest distance between two objects that allows them to be seen as distinct objects. o Resolving power of the human eye is 0.1 mm • Light microscope – uses glass lenses and visible light to form a magnified image of an object. o Resolving power of about 100 nm (.0002 mm)
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duplicates during interphase to prepare for mitosis. Chromosomes are not clearly discerned in the nucleus. Prophase Chromatin in the nucleus begins to condense and becomes visible in the light microscope as chromosomes. The nuclear membrane dissolves. Microtubules attach at the kinetochores and the chromosomes begin moving. Metaphase Spindle fibers align the chromosomes along the middle of the cell nucleus. This line is referred to as the metaphase plate. This organization helps to ensure that in the next
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Discuss in detail the Cell Cycle‚ Mitosis and Meiosis. Cells have the ability to grow‚ have particular functions‚ and replicate during their life. Although cell enlargement is part of organismal growth‚ cell replication is also required and allows growth without each cell becoming too large. All of these activities are part of a repeating set of events known as the cell cycle. The major feature in the cell cycle is cellular replication and what enables for cellular replication is the process
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three-dimensional organization of the Golgi complex. • All Golgi Complex cisternae displayed uniform PA-TCH-SP staining. Diseases Related to Golgi Apparatus. Achondrogenesis Achondrogenesis type 1A is caused by a defect in the microtubules of the Golgi
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Comparison of Plant and Animal Cells Introduction Eukaryotic cells are very complex; there are many organelles‚ each serving a distinct function‚ present in eukaryotic cells. We can divide the eukaryotic group of cells in to two main groups‚ according to the presence of these membrane bound organelles‚ and the structural differences amongst the cells and their organelles. The two groups of eukaryotic cells are plant and animal cells. Nucleus The reason that plant and animal cells are not divided
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mitotic process. What are the changes that occur in a cell during prophase? Chromatin fibers become coiled into chromosomes with each chromosome having two chromatids joined at a centromere. In the cytoplasm‚ the mitotic spindle‚ consisting of microtubules and other proteins‚ forms between the two pairs of centrioles and centrosomes as they migrate to opposite poles of the cell. The nuclear envelope disappears at the end of prophase. ii) Metaphase Is a stage
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Chapter 2.0 Cell Structure and Functions Prokaryotic and Eukaryotic cell Cell are grouped into tissue Cell as a unit of life Prokaryotic and eukaryotic cells Structure and functions: cell membrane Microscopic and structures of organelles plant and animal cell Cell prokaryotic theory eukaryotic Plasma membrane Organeles - Nucleus - mitochondria Plant cell Animal cell - ruogh and smooth endoplasmic reticulum -Golgi body --ribosome --lysosome compare --chloroplast --centriole animal plant
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plasma membrane to power the movement of the flagellum. Eukaryotic cells have a completely different kind of flagellum‚ consisting of a circle of nine microtubule pairs surrounding two central microtubules. It has a whip movement rather than a rotate movement. Today the cells of many no longer maintain flagella but rather a similar short microtubule cilia. Cilia can be used to move cell and move fluids through water. In the bacterium‚ the chromosome consists of a single naked circle of DNA. In eukaryotes
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