you must post to at least TWO (2) other students with genuine, thought provoking responses (minimum 100 words each).
1. Why is it more beneficial for a person stranded in the cold to keep moving and exercising rather than remaining inactive?
2. Muscles that are immobilized for long periods of time, as with a cast, frequently get smaller. Why? What is necessary to revitalize them?
3. Why do you suppose activities such as swimming and fast walking are so beneficial? Are there any negative attributes to activities such as racquetball and sprinting?
4. How can weight lifters have such enormous muscles, while long-distance runners have lean muscles?
5. What effect would there be on the body if intestinal peristaltic waves were stopped either by infection or injury?
6. Why do athletes “warm up” before a competitive event? Would you expect the warm-up period to make contraction more or less efficient? Why?
7. Visit a local gym frequented by body builders. Obtain information on the procedures used to build muscle mass and an explanation of how those procedures accomplish that goal.
8. If the number of myosin heads were doubled, what would be the effect on force
production? ATP consumption?
9. What is a muscle spasm? How do you think it may be caused?
10.Are spasms and cramps related? Compare and contrast the different possible mechanisms of each.
11.Draw diagrams of different fascicle arrangements and describe what type of movement is characteristic of each (i.e., short range, powerful, etc.). Then, have students apply these ideas to place the different fascicle types in logical locations on an articulated skeleton (e.g., the deltoid origin and insertion is a logical example of perfect use of a convergent pattern).
STUDENT 1:
Why is it more beneficial for a person stranded in the cold to keep moving and exercising rather than remaining inactive?
The normal human body temperature is 37 degrees celsius or 98.7 in Fahrenheit, in some people, this may vary through various situations and demographics. One very common situation with a change in body temperature is being exposed to cold air and even water will eventually cause hypothermia. Hypothermia is a significant drop in the body’s temperature instead of producing heat. In this situation or to prevent hypothermia it is best for a person to continue to move and exercise to help the body create heat. The movements will help stimulate the body’s muscles, circulate blood flow and help with metabolism. Remaining inactive in the cold will help speed up hypothermia and other amounts of side effects such as shivering, disorientation, and even exhaustion. Eventually remaining too long within the cold without much activity in the body will cause death.
What is a muscle spasm? How do you think it may be caused?
We may all know what a muscle spasm may feel like and it can be quite irritating. A muscle spasm, which may also be called muscle cramps, are contractions or tightening of the muscle which can be quite painful for some people. In some cases, they can last around 10 to 15 seconds and may reoccur before going away. Muscle spasms are very common. Even though there is not a definite answer these spasms may be caused by overused muscles, fatigue, and even dehydration. For those who participate in sports and other physical activities, cramps may occur from not stretching beforehand. Those who experience these muscle spasms quite regularly should consult with their doctor because they have a chance of causing life-threatening damage. However, it can be self-treated through various ways such as exercise and home remedies. There are also medications that can be provided by the doctor as treatment.
STUDENT 2:
Question 1
If a person is stranded in the cold it is much more beneficial for them to keep moving and exercising rather than remaining inactive because when muscles are being used they generate heat. When a person is in motion or exercising their muscles are constantly contracting over and over again. When muscles contract they generate heat that maintains normal body temperature but overtime it produces excess heat which is why athletes sweat when working out their bodies are producing extra heat that warms up the body in the case of being cold these excess can given off when exercising can give a person warmth to stay comfortable. On the flip side of a person is inactive they’re not creating any heat so their body temperature will only get colder to match the temperature around them. In response to this cold the body tries to create heat by shivering but in extreme cold similarly to way exercising creates heat.
Question 2
The amount of work a muscle does is reflected in changes in the muscle itself. When muscles are used frequently and go through challenges they become bigger and stronger. This is based on the overload principle, which states that forcing a muscle to work hard increases its strength and endurance which cause it to be greater in size and stronger. On the flip side when muscles are immobilized for long periods of time such as the situation of having to be wrapped in a cast, they tend to get smaller than usual. This process is called muscular atrophy. If muscles aren’t being overloaded or challenged they begin to waste away because they lack the stress or challenge it requires to become bigger. To revitalize these muscles you must challenge them but start at a much slower and smaller rate. Some examples would be doing exercises with lighter weights.
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