Download SVHS ADVANCED BIOLOGY NAME: 9th ed. Tortora PERIOD: 1 2 3

SVHS ADVANCED BIOLOGY
9th ed. Tortora
NAME: ________________
PERIOD: 1 2 3 4 5 6
D.R. #6.3 – SKELETAL MUSCLE METABOLISM
Using Figure 8.12 on page 201 and reading 8.10,
1. Diagram the triceps brachii muscle as
shown in diagram.
2. Label the origin(s) and insertion(s)
for both the bicep brachii and the
triceps brachii.
3. Label the resistance regarding the
contraction of the biceps brachii.
4. Label the force and fulcrum regarding
the lever system when the bicep
brachii contracts.
5. What type of lever system is illustrated
by the flexion of the elbow? Why?
6. The elbow, during extension, is a 1st class lever. Explain why.
7. Identify the prime mover and antagonist muscles during flexion of the elbow. Explain
each.
8. Identify the prime mover and antagonist muscles during extension of the elbow.
9. Explain the role of synergists and fixators during flexion or extension of the elbow.
AFTER READING “Common disorders” on pgs 245-246:
10. What is muscular dystrophy?
11. What is fibromyalgia?
12. What is a tic?
13. What is PRICE therapy?
14. What are some negative effects of using anabolic steroids?
AFTER READING 8.3 “NEUROMUSCULAR JUNCTION”;
15. A _____________________ delivers a _________________________ which is an impulse that will
cause muscle cells to contract.
16. All muscle cells that connect to a single motor neuron is called a _________________.
17. Label the motor axon that carries the motor
action potential to the muscle fiber.
18. Label the synaptic cleft which is the
microscopic gap between the muscle cell and
the motor neuron.
19. Label the muscle fiber (cell).
20. Label the myofibrils within the
muscle fiber.
21. Label the motor endplate that releases ACH.
22. Explain the four occurrences when an action
potential reaches the endplate.
a.
b.
c.
d.