Week 3 Quiz ------------------------------------------------- Return to Assessment List Part 1 of 6 - | 18.0/ 21.0 Points | Question 1 of 32 | 3.0/ 3.0 Points | The endosteum | | | A. lines the medullary cavity. | | | | B. is the unit of compact bone. | | | | C. contains red bone marrow. | | | | D. surrounds the bone surface. | | | | E. is the end of long bones. | | Feedback: Good job! | Question 2 of 32 | 3.0/ 3.0 Points | The site where
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Experiment 2: Skeletal Muscle ABSTRACT Frog skeletal muscle is used as an animal model to study muscle contraction. The objectives of this experiment is to demonstrate the physiological responses of skeletal muscle to electrical stimuli using frog gastrocnemius‚ to understand twitch‚ summation‚ tetanus and fatigue‚ to investigate the relationship between initial tension and force of contraction‚ to explore the differences between human and frog skeletal muscle. The threshold voltage is 0.4V. The
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skeleton and ligaments interact to enable movement including antagonistic muscle pairs‚ extensors and flexors. Cartilage: a tissue made from collagen‚ which protects bone ends A muscle: an organ that produces movement by contraction A joint: the junction between two bones A tendon: joins muscle to bone A ligament: joins bone to bone to stabilise a joint Muscles work in pairs. One muscle produces the opposite movement from the other muscle‚ therefore‚ the pairs are called antagonistic pairs. Muscles
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Every year‚ about 110 cases of botulism are reported in the United States. About 25% of the cases result from food‚ while 72% are infant botulism and 3% are wound botulism. Food-borne botulism is usually caused by eating home-canned foods that are contaminated with the toxin botulin. Botulin is produced by Clostridium botulinum‚ which is the name of a group of bacteria commonly found in soil. The bacteria grow best in low-oxygen conditions. The bacteria form spores that enable them to survive
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hysioEx 9.0 – Exercise 2: Skeletal Muscle Physiology Name: Chart 1: Latent Period Results Voltage Active force (g) Latent period (msec) 0.0 0.00 XXXXXXXXXX 3.0 1.04 XXXXXXXXXX 4.0 1.32 2.40 6.0 1.65 2.40 8.0 1.81 2.40 10.0 1.81 2.40 Chart 2: Effect of Stimulus Voltage on Skeletal Muscle Contraction Voltage Active force (g) 0.0 0.00 0.2 0.00 0.8 0.02 1.0 .15 1.5 .43 2.0 .66 2.5 .87 3.0 1.64 3.5 1.19 4.0 1.32 4.5 1.42 5.0 1.51 5.5 1.59 6.0 1.65 6.5 1.70 7.0 1.74 7
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Part 1 of 17 - 1.67/ 5.0010004 Points Question 1 of 60 0.0/ 1.667 Points All of the following belong to feedback systems which control homeostasis EXCEPT A. All of the above are basic components of the feedback system. B. control center. C. receiver. D. receptor. E. effector. Answer Key: C Feedback: Please review chapter 1. Question 2 of 60 0.0/ 1.667 Points Group of related organs that have a common function is called a(n) A. organ.
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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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NPB 101L Final Exam Review Lab 2 – Skeletal Muscle 1. Describe basic setup a. What was manipulated? Intensity‚ frequency b. What was measured? Twitch tensions c. What concepts were investigated? i. Frog‚ sciatic nerve‚ gastroc‚ d. What was investigated? i. Effects of stimulus frequency and intensity on contraction-the more intensity‚ the higher the twitch tension. The more freq- the more twitch tension (By ~4.0pps we start to see summation of the twitches and by ~15pps we see no single twitches
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FROG MUSCLE PHYSIOLOGY 2) What was the smallest voltage required to produce max contraction? What proportion of the muscle fibers in the muscle do you think were contracting to produce this maximal response? Muscle fibers act in response to isolated stimuli in an all or none fashion. However‚ a muscle organ‚ such as the gastrocnemius muscle‚ is composed of many individual muscle fibers. It is known that all of the fibers in a muscle do not have the same threshold and that a stimulus applied to
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Metabolic Superstorm 1. Fill in the chart below. Use “+” if the patient’s vital sign is higher than normal‚ “−” if the sign is lower than normal‚ or “x” if the sign is normal. If you need to‚ use your text or another resource to determine normal values. Vital Sign Increase/Decrease/Normal Respiration Rate + Heart Rate + Blood Pressure - Body Temperature + 2. If you were the doctors on the scene‚ what diagnosis would you give this patient? (You may
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