Exercise 6: Cardiovascular Physiology: Activity 3: Examining the Effect of Temperature on Heart Rate Lab Report Pre-lab Quiz Results You scored 75% by answering 3 out of 4 questions correctly. 1. Organisms that usually maintain the same internal body temperature in spite of environmental temperature changes are You correctly answered: c. homeothermic. 2. The general name for the process that maintains the internal body temperature in humans is You correctly answered: a. homeostasis. 3. The
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Skeletal Muscle Physiology: Frogs & Human Subjects (1‚ 2‚ 5-8‚ 10-12‚ 14-16) 1. There is a greatr concentration of Na+ f ; there is a greater concentration of K+ e . When the stimulus is delivered‚ the ermeability of the membrane at that point is changed; and c ‚ initiating the depolarization of the membrane. Almost as soon as the depolarization wave has begun‚ a repolarization wave follows it across the membrane. This occurs as b . Repolarization restores the h of the resting cell membrane
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Kuroda et al. Skeletal Muscle 2013‚ 3:5 http://www.skeletalmusclejournal.com/content/3/1/5 Skeletal Muscle Open Access RESEARCH Canonical Wnt signaling induces BMP-4 to specify slow myofibrogenesis of fetal myoblasts Kazuki Kuroda1‚4‚ Shihuan Kuang1‚2‚ Makoto M Taketo3 and Michael A Rudnicki1* Abstract Background: The Wnts are secreted proteins that play important roles in skeletal myogenesis‚ muscle fiber type diversification‚ neuromuscular junction formation and muscle stem cell function
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Review Sheet Results 7-1 1. What additional skeletal muscles are utilized in an ERV activity? In food expiration‚ abdominal wall muscles and the internal intercostal muscles contract. 2. What was the FEV1 (%) at the initial radius of 5.00 mm? 74% 3. What happened to the FEV1 (%) as the radius of the airways decreased? FEV1% decreased as the airway radius was decreased. 4. Explain why the results from the experiment suggest that there is an obstructive‚ rather than a restrictive‚ pulmonary
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efficiency * Muscle fiber type * Higher efficiency in muscles with greater
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1. Discuss the relationship between distribution of muscle fiber type and performance. How might exercise training modify or change a person’s fiber-type distribution? Skeletal muscles contain multiple fiber types that are distinguished by their different myosin ATPase speed‚ and the development of their SR. The two main fiber types are type I and type II fibers. Type II fibers have a faster ATPase and a more developed SR than type I fibers. Type II fibers are also part of a larger motor unit‚
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The Aging Musculoskeletal System The human musculoskeletal system is the organ system that gives humans the ability to physically move‚ by using the muscles and skeletal system. It consists of the muscular system and the human skeleton. Bones are connected to each other at the joints by ligaments or cartilage and skeletal muscle is attached to bones‚ usually by tendons. Bones mass or density is lost as people age‚ especially in women after menopause. The bone loses calcium and other minerals. Bone
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polarized‚ sodium-potassium pump‚ threshold stimulus‚ depolarization‚ action potential‚ repolarization‚ hyperpolarization‚ absolute refractory period‚ relative refractory period‚ nerve impulse‚ compound nerve action potential‚ and conduction velocity. 2. To list at least four different stimuli capable of generating an action potential. 3. To list at least two agents capable of inhibiting an action potential. 4. To describe the relationship between nerve size and conduction velocity. 5. To describe the
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Lab 4: Skeletal Muscle Function Exercise 5: The Length-Tension Relationship Materials and Methods In this experiment I used a frog anesthetized with ms222. The frog’s skin is cut and removed from both the legs‚ the Achilles tendon is cut and the tendon and calf muscle are removed from the lower legs. The femur muscle is also cut. Attached to the legs are femur clamps which are connected to the transducer arm‚ stimulation electrodes are then positioned against the muscle. I plugged the output
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Nancy Yedanapalli physio ex Activity 6 1. Explain why the larger waves seen on the oscilloscope represent ventricular contraction. a. The ventricular contraction is of greater force than the atrial contraction‚ since the ventricular contraction functions to send blood throughout the entire body (systemic circulation)‚ where as the contraction of the atrium send blood only to the lungs and rest of the the heart (pulmonary circulation). 2. Explain why the amplitude
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