EXERCISE 2: Skeletal Muscle Physiology Student Name: ___________________________ Student ID#: _____________________ Student instructions: Follow the step-by-step instructions for this exercise found in your lab manual and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Rename this document to include your first and last name prior to submitting‚ e.g. Exercise2_JohnSmith.doc. Please make sure that your answers
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Question 1: Make a prediction about the basal metabolic rate (BMR) of the remaining rats compared with the BMR of the normal rat you just measured. Your answer : c. The BMR of both remaining rats will be lower than the normal rat’s BMR. Predict Question 2: What do you think will happen after you inject thyroxine into the three rats? Your answer : a. The normal rat will become hyperthyroidic and develop a goiter. Predict Question 3: What do you think will happen after you inject TSH into the three rats
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ORGAN SYSTEMS OVERVIEW – ANSWER KEY Review: Dorsal Body Cavity – Brain‚ Spinal cord Thoracic Cavity – Heart‚ Lungs‚ Bronchi‚ Trachea‚ Esophagus‚ Diaphragm Abdominopelvic Cavity – Liver‚ Stomach‚ Pancreas‚ Spleen‚ Small Intestine‚ Large Intestine‚ Rectum‚ Kidneys‚ Ureters‚ Bladder‚ Adrenal Glands‚ Descending Aorta (an artery)‚ Inferior Vena Cava (a vein) Umibilical Region: Stomach‚ Pancreas‚ Small Intestines‚ Aorta‚ Vena Cava‚ Spinal Cord Epigastric Region: Liver‚ Stomach‚ Aorta
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Laboratory – Muscle Physiology A. MUSCLE TONUS Observations‚ Report and Conclusion: A. Define muscle tonus and give its importance * Muscle tonus refers to a state of slight muscular contraction maintained by synchronous impulses of low frequency‚ discharged by the spinal motor neurons. * Reflex in nature. * Muscle tonus is a small amount of tension in the muscle due to weak‚ involuntary contractions of its motor units. Muscle tonus is important in a sense that it governs the
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PHYSIOLOGICAL & MECHANICAL PROPERTIES OF SKELETAL MUSCLE USING FROG GASTROCNEMIUS AIM The purpose of this experiment was to demonstrate the physiological as well as mechanical properties of skeletal muscle using the gastrocnemius muscle of a frog by exploring five different investigations namely the single twitch‚ the graded response‚ the relationship between muscle length and tension‚ muscle tetanus‚ and muscle fatigue. These individual experiments aim to explore the way muscles can contract when an electrical
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NAME LAB TIME/DATE _ Microscopic Anatomy and Organization of Skeletal Muscle Skeletal Muscle Cells and Their Packaging into Muscles 1. Use the items in the key to correctly identify the structures described below. g; perimysium c; fascicle Key: a. b. c. endomysium epimysium fascicle fiber myofibril myofilament perimysium sarcolemma sarcomere sarcoplasm tendon 1. 2. 3. 4. 5. 6. 7. connective tissue ensheathing a bundle of muscle cells bundle of muscle cells contractile unit of muscle
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S H E E T EXERCISE NAME_________________________________ LAB TIME/DATE ________________________ A C T I V I T Y 1 1 Cell Transport Mechanisms and Permeability Simulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. ______________________________________________________ __________________________________________________________________________________________________ 2. Why do you think the urea was not able to diffuse through the
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Exercise 8: Chemical and Physical Processes of Digestion: Activity 1: Assessing Starch Digestion by Salivary Amylase Lab Report Pre-lab Quiz Results You scored 0% by answering 0 out of 6 questions correctly. 1. The substrate for amylase is Correct answer: e. starch and carbohydrate. You have not answered this question. 2. Which of the following is true of enzymes? Correct answer: c. Their activity can be affected by temperature and pH. You have not answered this question. 3. The reagent IKI tests
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of three different muscle types cardiac‚ smooth‚ and skeletal muscle. For this particular experiment the primary focus was skeletal muscle‚ which accounts for about 36% to 45% of total body weight and involves the integration of more than 600 different muscles (WordPress‚ 2006). Skeletal muscle contains many unique properties such as; elasticity and extensibility which allows a muscle to be stretched and return to its original state when not in use. Additionally skeletal muscles also contain a property
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Frog Skeletal Muscle The aim of this experiment is to explore the basic physiological principles of skeletal muscle using the isolated frog (Rana pipiens or Xenopus laevis) gastrocnemius muscle. Students will dissect a double-pithed frog. Then‚ they will connect the muscle to the Force Transducer to measure twitch recruitment‚ effect of stretch‚ muscle summation‚ muscle tetanus‚ and muscle fatigue. Written by staff of ADInstruments. Experiment Contents 1. Instructor’s Reference (this
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