Download WS –Misc. Muscle Info Name: Go to http://chemistry.about.com and

WS –Misc. Muscle Info
Name: ___________________________
1. Go to http://chemistry.about.com and search for rigor mortis. Scroll down to the articles about rigor
mortis and choose “What causes rigor mortis?”
a. Define rigor mortis and tell how long it approximately lasts.
b. The ________ ions that flow into the muscle cells (after the nervous system sends a signal)
promote cross bridge attachment between __________________ and _______________.
c. The muscle fibers slide on each other until they are fully contracted as long as
_______________________________ and ____________________ are present.
d. Why do muscle cells need ATP to release from the contracted state? In other words, what
function does the ATP have in this release?
e. Once the ATP reserves are used up (no more ATP can be made if you are dead!), the actin &
myosin will remain linked until _________________________________.
f. What is one main factor that affects the speed and duration of rigor mortis? ______________
g. How do CSI agents use info about rigor mortis? _________________________________
2. Go to page 180 in your textbook.
a. Anabolic steroids were first introduced when and why?
b. What is the reason that athletes began using anabolic steroids in the early 1960s?
c. List the 3 advantages of steroids as cited by athletes.
1. _________________________________________
2. _________________________________________
3. _________________________________________
d. Based on research:
i. Increases have been reported in:
1. ____________________________________________
2. ____________________________________________
ii. There are disputes over:
1. ____________________________________________
2. ____________________________________________
e. List 8 signs/risks of steroid abuse as stated by physicians.
1. ____________________________________________
2. ____________________________________________
3. ____________________________________________
4. ____________________________________________
5. ____________________________________________
6. ____________________________________________
7. ____________________________________________
8. ____________________________________________
1. Given what you have learned about muscle fibers and that structure determines function: Why
is chicken breast meat white while chicken thighs & legs dark meat?
2. Given a man and a woman of equal weight and equal athletic fitness level: Which one will have
more total strength and why?
3. Using the building muscle mass information and muscle man diagrams from the lab book:
a. Circle the LEAST effective exercise for toning the external and internal obliques?
Explain why beside the picture.
i.
iii.
iv.
ii.
4. The amount of energy a muscle can make is limited by our
_____________________________ and ____________________ systems and their
delivery speed.
5. Think this question through! As the muscle runs out of ______, it must enter into
__________________________ respiration to continue to make ATP to function. This
causes a buildup of _______________________ which make our muscles sore until the
body converts it to pyruvic acid in the ________________ (organ). A hard working muscle
will increase/decrease in heat while also increase/decrease in pH levels. These
two changes trigger an increase/decrease in respiration rate and blood flow which helps
to repay the oxygen ___________________. An aerobically fit person will have a
slower/faster recovery time for their heart rate and respiratory rate to recover to normal
resting state.
6. Use reputable internet sites to determine the following information.
a. What is average resting heart rate? ___________ beats per minute.
b. To improve aerobic fitness, your target heart rate will working out should be
________% of your resting heart rate.
c. While working out to improve aerobic fitness, what is a quick check to see if your
respiration rate is in the target zone?
For HWEC, construct a well written 1 full page essay stating what you think AND why about steroid
use/abuse using info from your textbook and notes.