Anatomy & Physiology P5‚ M2 & D2: Explain the concept of homeostasis and discuss the probable homeostatic responses to changes in the internal environment during exercise In this assignment the concept of homeostasis will be explained and the probable homeostatic responses to changes in the internal environment during exercise will be discussed. Homeostasis is simply how the body keeps conditions inside the same. It is described as the maintenance of a constant internal environment.
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REVIEW SHEET EXERCISE 2 Skeletal Muscle Physiology NAME: LAB TIME/DATE: Electrical Stimulation 1. Name each phase of a typical muscle twitch‚ and‚ on the following line‚ describe what is happening in each phase. a. b. c. 2. In Activity 2‚ how long was the latent period? __________ msec Describe the chemical changes that are occurring during this period. The Graded Muscle Response to Increased Stimulus Intensity 3. From Activity 3‚ describe the effect of increasing
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Lab 6: Amphibian Muscle Contraction Results: For this experiment‚ Isometric contractions of the gastrocnemius muscle of a frog were analyzed and from this data the latent period‚ twitch‚ motor unit summation‚ tetanus‚ fatigue & mechanical summation were measured. The data was used to quantify the effect of passive tension on the twitch force‚ effect of stimulus intensity on the twitch force‚ effect of stimulus frequency on contractile force of xenopus gastrocnemius muscle. The threshold voltage
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Alzheimer’s Disease: Alzheimer’s Disease is a degenerative brain process that produces‚ usually slowly over time‚ dementia or senility. It is also known as senile dementia. The brain is disrupted from the way it normally works – mental function becomes impaired -- and the patient’s memory‚ ability to think clearly and sometimes the patient’s language is impaired. The causes of Alzheimer’s are still not known -- but we do know that the disease produces physical change in the brain. There is shrinking
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Inhibitory activities of rubrofusarin and its derivatives against AChE‚ BChE and BACE1 In order to evaluate the anti-AD potential of the isolated rubrofusarin and its four derivatives‚ we evaluated their abilities to inhibit AChE‚ BChE and BACE1. Results are summarized in Table 1. Of the derivatives‚ 3 showed most potent activity against AChE with an IC50 of 15.94 ± 0.32 µM whereas 2 had least inhibitory activity (148.08 ± 2.09 µM). 4 and 5 exhibited moderate inhibition with IC50 value of 86.05 ±
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Have you ever seen someone walking through a mall or a market‚ like they’ve been lifting a 300kg Barbell for 12 hours straight? Yet they still look weak‚ beat up and tired. This person has bags under his bloodshed eyes‚ his skin looks dull‚ grey and pasty and his shoulders are rounded forward. His voice carries a tint of disgust of how tired and burnt out they feel. Even though‚ they really haven’t moved their body. Here are just some predictions about that person‚ his schoolwork is horrible and
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Musculoskeletal Physiology Be familiar with bones and muscles of body 3 types of muscle skeletal‚ smooth‚ cardiac attaches muscle to bone‚ decreasing angle of joints during contraction proximal part of esophagus doesn’t connect to bone‚ proximal (upper) conscious control is primary skeletal‚ distal is involuntary and smooth muscle T- tubules: inside is ECS‚ deep invaginations of plasma membrane in muscle cell PM is sarcolemma allows high concentration of Ca‚ like other EC spaces (IC is
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The effects toxins such as caffeine‚ nicotine‚ epinephrine‚ ethanol and salt have on the Daphnia magna’s heart rate Results The effect the various drugs caffeine‚ nicotine and epinephrine had on the Daphnia magna is displayed in Figure 1. After three sample trials were taken there was an average of 180 beats/min-1 ± 6.928 taken under normal conditions. The addition of caffeine caused an increase in the average heartbeat to change to 192 beats/min-1 ± 9.165 in the Daphnia magna tested. When testing
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Results A left gastrocnemius muscle of a frog (L=3.2cm in situ) was used in experiment 1 and 2‚ while a right gastrocnemius muscle of a frog (L=3.4cm in situ) was used in experiment 3. The sciatic nerve of the frog was placed over the stimulatory electrodes covered with a piece of a Kimwipe moistened with Ringer’s solution. The relationship between muscle length‚ force production and velocity of contraction was studied. Force transduced calibration In order to get a more accurate data from force
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II-Needle Electromyography: Is complements nerve conduction studies and serves a critical role in the evaluation of both muscle and nerve diseases. Recording the electrical activity of the muscle cell membrane with a needle electrode inserted in the muscle‚ the motor unit potential (MUP) can be recorded. Electromyography is performed using an instrument called electromyograph‚ to produce a record called electromyogram. This represents the summated electrical activity of action potentials of all
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