The Muscular System Tour Lab A skeletal muscle works by ... The Muscular System Tour Lab Answer all questions on the lab answer sheet . Author: James ...
Muscular System Webquest. Using the links provided, complete the following muscular system web quest. Be sure to follow the directions at each webpage and take time to learn about the muscles. 1. Find Multi-talented Muscles: http:// www.kidshealth.or
347 Anatomy of the Muscular System CHAPTER 10 Skeletal Muscle Structure, 348 Connective Tissue Components, 348 Size, Shape, and Fiber Arrangement, 348
7th Life Science Lab 11C Human Anatomy & Physiology: The Muscular System 5 Background Material Part 3: Chicken Wing Structure
0 Many of our muscles are connected to bones and joints. 0 Our bodies have over 600 muscles and they all have a special job. Explain to the students that there are 2 types of muscles: voluntary and involuntary. o A voluntary muscle is a muscle we can
Unlike nervous system which provides instant but short-lived communication, ... When this binding occurs, a second messenger in the cytoplasm is activated
Sistemul Muscular Acest curs prezinta Sistemul Muscular. In acest PDF poti vizualiza cuprinsul si bibliografia (daca sunt disponibile) si aproximativ doua pagini din
Sistemul muscular Totalitatea mu şchilor organului vertebrelor reprezint ă sistemul muscular.Mu şchii sunt forma ţi din ţesuturi musculare:
músculos faciales. internas del cuerpo, no podemos apreciarlos ni sentirlos desde el exterior. Ejmplo el Escaleno, situado en el cuello ayuda a la
2 Los músculos representan entre el 40% y el 45% del peso corporal del adulto. El sistema muscular voluntario se compone de aproximadamente 434 músculos, pero solo
Gliding Skeletal System Tour Lab 2. Label the joints on your answer sheet. Station 2 Types of Joints Hinge Joint –allows back and forth motion (like a door)
muscular şi menţinerea aceleiaşi poziţii un timp mai îndelungat pot determina apariţia acestor crampe musculare. Cârceii nu sunt o problemă medicală
The Skeletal System 3. ... Complete the following statements referring to the bony thorax by inserting ... The organs protected by the thoracic cage include the (1)
Chapter 5 The Skeletal System ... system Figure 5.3. CChanhangesges inin tthehe HHumumanan SkSkeletoneleton In embryos, the skeleton is primarily hyaline
Sample chapter from www.software-smith.com/csbook. Copyright material. ... At the conclusion of this chapter, you should understand the Inventory System and how it relates to other. Commerce Server ... With this information you can make intelligent d
follow. Answering the questions will help guide your background research on each applicant and will help you decide who should be placed in each position! To help your research process, let me give you a little background on the. Immune System: The i
The Endocrine System ... Second messenger system of the body Uses chemical messages (hormones) that are released into the blood Hormones control several major
THE INTEGUMENTARY SYSTEM ... Up to 30 layers of dead, scaly, keratinized cells ... once epidermal cells migrate more th an two or three cells away from
Download ABSTRACT. Background: Hypertensive disorders in pregnancy are the main cause of maternal and fetal mortality; however, they have no definite effective treatment. The researchers aimed to study the effects of progressive muscular relaxa
1 THE BLACKBOARD LEARNING SYSTEM Peter Bradford1, Margaret Porciello, Nancy Balkon, Debra Backus United University Professions*, Albany NY 12212-5143
4 contents introduction 8 foreword 10 introduction - part one 17 part one 18 part one - study questions with answers 24 introduction - part two 25
of rugby to the smooth elegance displayed by a gymnast on the beam, require the skeletal and muscular systems of our bodies to work together effectively and efficiently. Our skeleton provides the framework that allows movement to take place and our s
Download ABSTRACT. Background: Hypertensive disorders in pregnancy are the main cause of maternal and fetal mortality; however, they have no definite effective treatment. The researchers aimed to study the effects of progressive muscular relaxa
Lab 12 - The Skeletal System: Joints ... 1. Use the articulated skeleton to observe structure and movement of the joints and fill in the table below
The Muscular System Tour Lab
The Muscular System There are more than 600 muscles in the Human Body!!!
Muscles are…
Needed for all types of movement.
Needed to pump blood
Needed to breathe (diaphragm muscle).
Needed to produce body heat and regulate body temperature.
Needed to Protect internal organs.
The Muscular System Tour Lab
Answer the questions on your lab answer sheet
3 Types of Muscle
View video clip: Muscle Types (A.D.A.M.) http://www.umm.edu/aniplayer/
View video clip:
Skeletal Muscle: Skeletal Muscle (A.D.A.M.)
also found on Human Biology/Links page of www.myscience8.com
http://www.umm.edu/aniplayer/ also found on Human
Voluntary (under your conscious control)
Biology/Links page of
Movement www.myscience8.com
of your bones, face, eyes, etc.
Cardiac Muscle:
Involuntary (not under your conscious control) Movement of your heart and certain blood vessels.
Smooth Muscle:
Involuntary (not under your conscious control) Movement of your intestines, esophagus, and other internal organs.
The Muscular System Tour Lab
Skeletal Muscle Nuclei
Striations 400X (High Power)
Move your bones (also your face, eyes etc) Voluntary (you can control them) Over 400 skeletal muscles in your body Long cells with several nuclei (along edges of cell) Stripes called striations in cell (visible in high power)
The Muscular System Tour Lab
Cardiac Muscle
Nuclei
400X Striations cannot be easily seen at
(High Power)
this magnification
The muscle of the Heart Involuntary (you cannot control them) Works 24 hours a day every day of your life!!! Strongest type of muscle Only one nucleus per cell (usually in center of cell) Some striping (striations)
but not as much as skeletal muscle
The Muscular System Tour Lab
Smooth Muscle
Nuclei 400X (High Power)
The muscles of the esophagus, stomach, intestines and other internal organs Involuntary (you cannot control them) Contract slowly and smoothly Can remain contracted for long periods of time Usually one nucleus per cell (usually in center of cell) No striping (striations)
The Muscular System Tour Lab
Anatomy of a Muscle Body of
Bone Tendon
Muscle
Answer the questions on your lab answer sheet
View video clip: Skeletal Muscle (A.D.A.M.) http://www.umm.edu/aniplayer/ also found on Human Biology/Links page of www.myscience8.com
Fascicle (Bundle of Muscle Fibers)
Muscle Fiber (Muscle Cell)
Nuclei of cell
Myofibril
The Muscular System Tour Lab
How a Muscle Works A skeletal muscle works by CONTRACTING (getting shorter).
The muscle can shorten as much as 1/3 its resting length. Fascicle
(group of muscle cells)
Each muscle cell is made up of many smaller MYOFIBRILS Muscle Cell
The MYOFIBRILS are in contact with a nerve ending.
Myofibril Relaxed
The nerve releases a chemical called a NEUROTRANSMITTER. The Neurotransmitter stimulates the entire muscle cell to contract.
Myofibril Contracted Nerve ending in contact with muscle cell Motor Nerve
Myofibrils Muscle Cell
The Muscular System Tour Lab
Muscle to Tendon to Bone
Tendon
Muscle
TENDONS Attach
Bone
Muscle to Bone Muscle T e n d o n Bone
Bone
Tendon Muscle
The Muscular System Tour Lab
Opposites Contract
… and Relax
Biceps Contracted
Biceps Relaxed
Triceps
Triceps
Relaxed
Contracted
Arm Flexed (bent) Arm Extended (flexed) Muscles work in pairs. The biceps muscle will bend the arm at the elbow and the triceps muscle will straighten the arm. While one muscle in the pair contracts the other must relax.
The Muscular System Tour Lab
The Muscles …
a front view
The Muscular System Tour Lab
The Muscles …
a back view
The Muscular System Tour Lab
The Muscles …
a side view
Ligament of wrist
Using the muscle diagrams for the
A
front view and the back view, identify and label these muscles on your lab
Your muscles need Glycogen (muscle sugar) in order to function. When the glycogen is broken down into energy for the muscles a waste product called lactic acid is produced. A buildup of lactic acid decreases the muscles’ ability to contract and Muscle Fatigue sets in.
Do this: Hold a book in each hand. Raise one arm straight out parallel to the ground and the other arm down at your side. Compare the feeling in each arm. Answer questions on your lab sheet. Answer the questions on your lab answer sheet
View video clip: Excercise (A.D.A.M.) http://www.umm.edu/aniplayer/ also found on Human Biology/Links page of www.myscience8.com
The Muscular System Tour Lab
Muscle Fatigue
… Too Tired to Sit
Your muscles need Glycogen (muscle sugar) in order to function. When the glycogen is broken down into energy for the muscles a waste product called lactic acid is produced. A buildup of lactic acid decreases the muscles’ ability to contract and Muscle Fatigue sets in.
Do this: Sit against the wall with your knees bent at a 900 angle. Hold this position for as long as it takes to feel muscle fatigue. (If it’s been more than 3 minutes you ain’t doin’ it right).
View video clip: Excercise (A.D.A.M.)
Answer all questions on your lab answer sheet
http://www.umm.edu/aniplayer/ also found on Human Biology/Links page of www.myscience8.com
View video clip: Excercise (A.D.A.M.) http://www.umm.edu/aniplayer/
The Muscular System Tour Lab
also found on Human Biology/Links
Muscle Fatigue
page of www.myscience8.com
… To Beat or Not to Beat
Your heart is made up of a very special type of muscle called Cardiac Muscle. It keeps working hard from before the day you are born until the moment of your death. It never gets needs to stop and rest like your skeletal muscles do. Cardiac muscle does not experience muscle fatigue but skeletal muscles do. Here we will compare cardiac and skeletal muscles with the help of your strong arm and a “tennis ball heart”.
Do this: Extend your arm out in front of you and using your hand, squeeze the tennis ball hard one time each second. This is how hard your heart works… and it doesn’t complain! Answer the questions on your lab answer sheet.
You would not live long if your heart were made of skeletal muscle.
The Muscular System Tour Lab
Muscle Fatigue
… Get a Grip
After just 7 seconds of use the muscle begins producing lactic acid as glycogen is broken down to provide energy. To help delay muscle fatigue, the muscle fibers are constantly switching on an off to allow individual fibers a moment to rest. This activity will demonstrate the effects of action of muscle fibers.
Do this: 1. Hold a popsicle stick in front of you , parallel to the table top.
2. Place a bent paper clip on the stick. 3. Raise the stick until the legs of the paper clip just touch he table.
4. The top of the paper clip should rest on the stick.
5. Hold the stick as steady as you can for about 30 seconds and observe.
6. Grip the stick tighter and repeat step 5. 7. Answer the questions on your answer sheet.
The Muscular System Tour Lab
Muscle Fatigue
… Clothespin Calisthenics
Your muscles need Glycogen (muscle sugar) in order to function. When the glycogen is broken down into energy for the muscles a waste product called lactic acid is produced. A buildup of lactic acid decreases the muscles’ ability to contract and Muscle Fatigue sets in.
Do this: 1. Hold a clothespin between your thumb and index finger and see how many times you can squeeze it in one minute. Record 2. Now, without resting, squeeze it as fast as you can for a second minute. Record
View video clip:
Answer the questions on your lab sheet
Excercise (A.D.A.M.) http://www.umm.edu/aniplayer/ also found on Human Biology/Links page of www.myscience8.com
The Muscular System Tour Lab
Making a Temporary Muscle Slide (from Dead Meat)
You better see the striations or your dead meat!!
Do this: 1. Place a very small piece of dead meat (shaved beef steak) on a clean glass slide. 2. Tease the meat apart with two dissecting needles. 3. Place one drop of stain on the meat and cover with a cover slip. 4. Observe under the microscope in all 3 powers.
Note: You will only see striations (stripes) under high power with the light (diaphragm) turned down low. Show your teacher when you have found them!! Answer questions on lab answer sheet
Striations
The Muscular System Tour Lab
Muscle Stimulation Your muscles contract when a mild electric current comes in contact with the myofibrils in the muscle cells. The chemicals in your body produce the electricity to cause a muscle to contract. If muscles are stimulated from an artificial electrical signal, they will contract but without your conscious control. This is what a MUSCLE STIMULATOR does.
Do this: Go see your teacher for a shocking demonstration. (for the next 30 seconds we are in control of your muscles)
The Muscular System Tour Lab
Muscle Tutorial Complete the
Muscle Tutorial found online at: http://www.gwc.maricopa.edu/class/ bio201/muscle/mustut.htm
Or just go to the
Human Biology/Links page of our science website (www.myscience8.com) and click on the Muscle Tutorial link.
