Name_______________________Period___________ Chapter 6: A Tour of the Cell Concept 6.1 Biologists use microscopes and the tools of biochemistry to study cells 1. The study of cells has been limited by their small size‚ and so they were not seen and described until 1665‚ when Robert Hooke first looked at dead cells from an oak tree. His contemporary‚ Anton van Leeuwenhoek‚ crafted lenses and with the improvements in optical aids‚ a new world was opened. Magnification and resolving power limit
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Through this experiment‚ Egeria densa was observed using a microscope. The task was to observe and identify the different types of cell‚ cytoplasmic streaming‚ and plasmolysis of Egeria densa. First‚ the microscope was examined and investigated to master the use of the equipment. A microscope slide grid which was on the slide glass was required to be seen clearly using 4x‚ 10x and 30x. During the latter part of the experiment‚ the Egeria densa was observed using the microscope to understand the
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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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1. The transfer of substances containing carbon between organisms and between organisms and the environment 2. The causes of variation and its biological importance. 3. Mean temperatures are rising in many parts of the world. The rising temperatures may result in physiological and ecological effects on living organisms. Describe and explain these effects. 4. Cells are easy to distinguish by their shape. How are the shapes of cells related to their function? 5. Enzymes and their importance in plants
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September 3‚ 2013 Class 1 Professor Graham Caldwell INTRODUCTION TO KIN 297G Neuromechanics of Human Motion Biomechanics Motor control What would I need to study‚ understand‚ teach the activity? Basics of flight Design of wing suit Control of flight path Muscular requirements Motor learning Execution of rolls‚ somersaults Sensory systems What questions do you have? How would you answer them? Study of Human Motion Clinical medicine (people who have difficulty moving) Sporting environments (people
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is labeled shuttle streaming‚ because the fungus reverses the direction of the streaming every 1.5 to 3 minutes. Calcium is shown to increase the growth of P. polycephalum in the first 48 hours‚ then impede the growth due to calcium binding to the myosin‚ which may serve as a signal to slow and increase the rate of cytoplasmic streaming (Farkas et al. 2003; Zhang et al. 2012; Ridgway and Durham 1976; Kuroda & Kuroda 1982; Terry et al. 2009;). Calcium and magnesium are both from the same chemical
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myofibrils that allow for muscle contraction. 3. The parts of the myofibrils that allow for it to extend out are called the sacomere. 4. The nerve cell that connects to several muscle fibers called a motor neuron. 5. The thick ones are protein myosin. The thin ones are protein actin. 6. The chemicals that stimulate the muscle to contract are called neurotransmitters 7. Acetylcholine contracts the muscles. 8. Acetylcholines are stored at the end of each motor neuron. 9. The combination
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Week #1 -autotrophs are organisms that harvest light or chemical energy in organic compounds. They self nutrition -heterotrophs are organisms that get complex nutrients from the environment (by eating other organisms) -Fungi are heterotrophs or predators because they are parasitic. Bread mold secretes digestive enzymes to enter the membrane. Same as foot fungus‚ it extends hyphae (fungal branches) into the cells to absorbs nutrients -One fungus makes traps for nematode worms while another fungus
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Botulism is a dangerous neuroparalytic illness caused by a botulinum toxin that is a product of the Clostridium botulinum bacteria. This toxin invades neuromuscular junctions by blocking the release of acetylcholine and results in lack of muscle contraction. According to Centers for Disease Control and Prevention‚ “There are three main kinds of botulism: foodborne botulism‚ infant botulism‚ and wound botulism. Foodborne botulism occurs when a person ingests the toxin within food that leads to illness
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Latin English diathroses Freely moving joints such as knuckles are called synarthrose Skull sutures and other immovable joints are called synovial fluid The lubricant in the joint cavity of a diarthrosis is called tendon sheath A long tubular bursa enclosing a tendon is called range of motion The maximum angle through which a joint can move is called resistance arm The part of a lever from the fulcrum to the resistance is called fulcrum ‚ effort In the elbow‚ a third-class lever‚ the ____
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