Your heart speeds up to pump extra food and oxygen to the muscles. Breathing speeds up to get more oxygen and to get rid of more carbon dioxide. When a fit person‚ such as an athlete‚ exercises the pulse rate‚ breathing rate and lactic acid levels rise much less‚ than they do in an unfit person. As the exercise intensity increases so do the heart and respiratory rates to supply oxygen to the working muscles at a faster rate so they can keep up‚ few athletes have perfected this to a point where they
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in the cell cycle. Particular protein kinases give the go-ahead signals at G1 and G2 checkpoints. These protein kinases are present at a constant concentration in the cell but are inactive unless in the presence of cyclin‚ these are cyclin dependent kinases. The activity of a cdk rises and falls with the concentration of cyclin. Cyclin levels rise during the S and G2 phases then fall abruptly in the M phase. MPF – maturation-programming factor – cyclin cdk complex that triggers a cells passage
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Cell Biology Exam 1 Notes Lecture 1: Introduction to Cell Biology • Biology is studied at different levels of organization Time Scale • [Figure 1-9] How big is a cell and how big are its parts? • There are important similarities that all cells share; however‚ there are also important differences among various cell types (for example‚ animal cells vs. bacterial cells) • [Figure 3-23] The inside of a cell is loaded (crowded
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Chapter 38: Activity and Exercise! Test Bank! ! MULTIPLE CHOICE! ! 1.! The coordinated efforts of the musculoskeletal and nervous system maintain balance‚ posture‚ and body alignment. Body alignment refers to! ! a.! A low center of gravity balanced over a wide base of support.! b.! The result of weight‚ center of gravity‚ and balance.! c.! The relationship of one body part to another.! d.! The force that occurs in a direction to oppose movement.! ! !! ANS: C
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Unit 1 Exercises Chapter 1 1. What is free software? List three characteristics of free software. Free software is a no charge/ non price software. Free software is software that users have the freedom to distribute and change. The 3 characteristics of free software is that you’re able to download it many times & install it on several computers without paying out of pocket each time you download it. The 2nd characteristic is you can also share the free software with others. And the 3rd characteristic
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Experiment 2 : Transport Across Membrane Name : Matrix No : Group : B Semester : 1 Date of Experiment : 05.09.2013 Lecturer’s Name : Miss OBJECTIVE To study the effects of hypotonic‚ hypertonic and isotonic solutions on plant and animal cells. INTRODUCTION In cellular biology the term membrane transport refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes‚ which are lipid bilayers
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EXERCISE 3: Neurophysiology of Nerve Impulses ACTIVITY 1: The Resting Membrane Potential Answers 1. The nervous system contains two general types of cells: neuroglia cells and a. nerves. b. cell bodies. c. neurons. d. nephrons. 2. The resting membrane potential of the neuron in this lab under the control conditions was _______ mV. 3. True or False: For most neurons‚ the concentration of Na+ and K+ ions inside and outside the cell are the primary factors that determine the resting membrane
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Definition In the context of humanitarian organisations transport is defined as: “The activities involved in moving supplies from point of origin to internal customers or beneficiaries”. The aim of transport is to physically move supplies in a reliable and safe manner‚ on time‚ cost effectively and efficiently to its destination. Policies The rapid growth of technology and the changes in the delivery of humanitarian aid has done little to change the fact that relief supplies still have
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.............................................................................................................ii Acknowledgement .............................................................................................................. iv Form 1................................................................................................................................. v Quote................................................................................................................
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Basic Mechanism An autoimmune disease occurs when the body produces an abnormal immune response against self antigens. It is caused by failure of the tolerance processes to protect the host from the action of self reactive lymphocytes. An organ-specific autoimmune disease involves gradual damage to cellular structures and is replaced by the compensating connective tissue which depletes the function of the gland/organ. Type 1 diabetes (TD1)‚ is an organ specific autoimmune disease characterize
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