Discuss the relationship between the cognitive and biological features of Alzheimer’s disease Alzheimer’s disease is a degenerative condition which is associated with the progressive loss of neurons and nerve cells‚ this causes people to lose their cognitive abilities such as their memory and their personalities begin to change. This is due to the fact that the disease pervades most areas of the brain. However the developing pattern of damage varies for each individual meaning each person
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Cellular Functions CORE TOPIC 1: CELLULAR FUNCTIONS Learning Outcomes: (a) Describe and interpret drawings and photographs of typical animal and plant cells as seen under the electron microscope‚ recognising the following membrane systems and organelles: rough and smooth endoplasmic reticulum‚ Golgi body‚ mitochondria‚ ribosomes‚ lysosomes‚ chloroplasts‚ cell surface membrane‚ nuclear envelope‚ centrioles‚ nucleus and nucleolus. (b) Outline the functions of the membrane systems and organelles
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Chapter 3 Cell Structure and Function Section 3.1: Cell Theory: Cells are the smallest building unit of living organisms that can carry out all processes required for life. Almost all cells are too small to see without the aid of a Microscope. Although glass lenses used to magnify images for hundreds of years‚ they were not enough to reveal individual cells. The invention of Compound microscope was in the late 1500s by the Dutch eyeglass maker Zacharias Janssen. In 1665‚ the English scientist
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of actions of the drugs used to treat tapeworms. Mebendazole and thiabendazole are broad-spectrum antiparasitic drugs used to treat roundworm infections. These drugs work in the intestine to inhibit the functioning of microtubules of worms‚ eggs and larvae. Inhibiting microtubules interferes
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al.‚2001). Ultrastructural changes: 1.2.1.5. The cytoskeleton‚is the internal structural organization of a cell‚ is composed of well organized network of complex structural proteins‚ including actin‚ microtubules and lamins.The cytoskeleton is multifunctional which is maintains internal cellular compartment and induce the transition of mechanical forces within the cell to adjacent cells and the extracellular matrix‚ the distribution of organelles‚ the
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fungi have eukaryotic cells. Basic structure The basic eukaryotic cell contains the following: 1. plasma membrane 2. glycocalyx (components external to the plasma membrane) 3. cytoplasm (semifluid) 4. cytoskeleton - microfilaments and microtubules that suspend organelles‚ give shape‚ and allow motion 5. presence of
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Population – species – community – eco system Reading scientific graphs: Independent variable – your own setting – x axis Dependent variable – measurement‚ Y-axis Centrioles (p. 87) Pull chromosomes during mitosis (animal cells) Assemble microtubules Anchor flagella / cilia 3 Differences between animal cells Position of nucleus Control Tower (p81) Nucleus: Control center‚ directs protein synthesis and cell reproduction Nucleolus: Assembles Ribosomes Manufacture / Delivery / Products
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copyright © 2002. All rights reserved. Insert your pie chart here: Mitosis in Animal Cells Summarize the differences between mitosis in plants and animals. Plants have a spindle but lack centrioles. Animals‚ on the other hand‚ have a spindle of microtubules that have a centriole at the end of the spindle. Another difference is that when plants go through cytokinesis‚ cell plates form in the middle of the mother cell and turns into a rigid cell wall that separates the two daughter cells. Instead of
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Definition of Microorganism Microorganism (from the Greek: mikrós‚ "small" and organismós‚ "organism") is an organism that is microscopic (usually too small to be seen by the naked human eye). Microorganisms live in all parts of the biosphere where there is liquid water‚ including soil‚ hot springs‚ on the ocean floor‚ high in the atmosphere and deep inside rocks within the Earth’s crust. Microorganisms are critical to nutrient recycling in ecosystems as they act as decomposers
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the chromatin becomes smaller and creates chromosomes. The pair of chromosomes are known as sister chromatids that are joined together at the center which is called the centromere. Spindles also form during the phase from long proteins called microtubules on both sides of the cell. After this‚ crossing over occurs and breaks then reconnects DNA to make a new combination of genes. Metaphase I is when the chromosomes line up on both sides of the middle of the cell then during Anaphase I the spindle
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