Download Exam3 241North SU09

BIOL&241 North – Exam 3
Station 1
Muscle A
Insertion of A
Origin of A
Muscle B
Action of B
One origin of B
Station 2
Muscle A
Action of A
Origin of A
Muscle B
Insertion of B
Muscle C
Origin of C
Station 3
Name any synergist of the
extensor carpi ulnaris
Muscle A
Muscle B
Action of A
Muscle C
Muscle D
Insertion of D
Muscle E
Action of E
Station 4
Station 5
Muscle that originates at
region A
Action of that muscle
Muscle that originates at
region B
Name any other muscle of
the rotator cuff
Muscle A
One origin of A
Name: ________________________________________
Insertion of A
Muscle B
Insertion of B
Muscle C
Point of insertion of C
Station 6
Muscle A
Muscle B
Point of origin of B
Muscle C
Point of insertion of C
Station 7
Muscle A
Insertion of A
Origin of A
Muscle B
Muscle C
Action of B & C
Station 8
Muscle A
One insertion of A
Origin of A
Muscle B
One action of B
Muscle C
Station 9
Tissue A
Tissue B
Primary protein fibers in A &
B
Structure C, outlined in
black
Structure D, outlined in blue
Station 10
Structure A
Structure B
Structure C
Organelle D
Protein fiber E
Protein fiber F
1. Answer the following questions about muscle tissue:
(7)
Name the three types of muscle tissue
in the body. (3)
Which type is under voluntary control?
Name three functions of skeletal
muscle. (3)
2. I trained for a marathon for 4 months. Please answer the following questions about changes in my muscles
after training:
(5)
Will I primarily use “slow” or “fast” twitch
muscle fibers when running this marathon?
Name two structural characteristics of my
“slow”, aerobic muscle fibers.
Name two adaptations that my “fast”,
anaerobic muscle fibers could make in
response to this training (must be different
from above).
3. I try to lift a Volkswagon Bug, but cannot produce enough muscle tension to overcome the resistance of the
Bug. Answer the following questions about my failed effort:
(8)
What specific type of contractions were my
muscles producing?
I steadily increased muscle tension before
giving up. List both mechanisms I used to do
this.
Describe one of these mechanisms.
Was I primarily using muscles with large or with
small motor units?
Explain your answer.
4. Muscles ultimately fail either because they lack something, or because they have too much of something: (8)
Beside O2, what one molecule could the muscle lack?
Name two organic molecules we metabolize (after
CP is exhausted) to create more of this molecule.
O2 is required to metabolize which one of these
molecules?
Name two molecules that a muscle may have too
much of.
Explain why an overabundance of these two
molecules causes failure.
5. A motor neuron stimulates the sarcolemma to fire an action potential. Explain the steps that follow that lead
to a muscle twitch. Please include all relevant ions, molecules and proteins.
(8)
6. Please draw an appropriately labeled graph of a single twitch. Include the stimulus, lag, contraction and
relaxation phases with appropriate relative lengths. Please also tell me what is happening to Ca2+ ions in the
contraction and relaxation phases.
(6)