A and P1 Fall Test 6 10/4/2011
Answer the following questions. Total score 50.
1. Match the following:
1 Slow fibers
1X10
A. Dense bodies
2 Cardiac muscle
B. Deltoid
3 Ocularis oris
C. Fast response but fatigue early
4 Smooth muscle
D. Carpel Tunnel syndrone
5 Bipennate
6 Tingling in palm
E. Movement in a loop
F. Enable movement of lips
7.Multipennate
G. Biceps
8. Parallel
H. Contain myoglobin
9. Latissimus dorsi
10. Fast fibers
I. Rectus Femoris
J. Sheet muscle
2.
Figure 2: Skeletal Muscle Fiber
Use Figure 10-1 to answer the following questions:
1. What is released from the structure labeled "9"?
A) sarcoplasm
B) acetylcholine
C) protein
D) calcium ions
E) acetylcholinesterase
1X10
2. Identify the structure labeled "1."
A) mitochondria
B) glycogen
C) ATP
D) myofibril
E) synaptic vesicle
3. Where would calcium ion be predominately found?
A) 1
B) 2
C) 4
D) 8
E) 9
4. What physiological process occurs in the structure labeled "7"?
A) release of neurotransmitter
B) conduction of the action potential into the cell interior
C) activity of acetylcholinesterase
D) release of protein into the muscle fiber
E) the sliding filament theory
5. Where are the myosin molecules located?
A) 4
B) 5
C) 6
D) 7
E) 8
6. Which structure contains the motor end plate?
A) 1
B) 2
C) 3
D) 5
E) 8
7. Which structure actively pumps calcium ions out of the sarcoplasm to produce relaxation?
A) 6
B) 7
C) 1
D) 3
E) 2
8. Which of the following are found in the structure labeled "3"?
A) actin
B) myosin
C) titin
D) tropomyosin
E) all of the above
9. Identify the structure where ATP is produced.
A) 6
B) 7
C) 1
D) 3
E) 2
10. Where is ATP is consumed?
A) 1
B) 2
C) 3
D) 6
E) 3 and 6
3. Label the following structures in the diagram of the knee.
1. Intracapsular ligament
2 Bursa
3 Articular cartilage
4 Patellar ligament
5 Fat pad
6. synivial fluid
7.Meniscus anterior and posterior
8.Patella
9.one marrow
10.Gastrusneimus muscle
1X 10
5. When a muscle fiber has produced more ATP than it currently needs, the energy is transferred to form another highenergy compound called
1X1
6. Put in correct order the events that occur during the transmission of an electrical impulse through a neuromuscular
junction: 1X5
Return to initial state
ACh binding at the motor end plate
Arrival of an action potential at the synaptic terminal
Appearance of an action potential in the sarcolemma
Release of acetylcholine
7. A high blood concentration of the enzyme creatine phosphokinase (CPK) usually indicates: 1X1
A. serious muscle damage
B. an excess of energy is being
produced
C. the release of stored energy
D. the mitochondria are
malfunctioning
8. Mitochondrial activities are relatively efficient, but their rate of ATP generation is limited by the: 1X1
A. presence of enzymes
B. availability of carbon dioxide
and water
C. energy demands of other
organelles
D. availability of oxygen
9. Which of the following has been correlated with muscle fatigue? 1X1
increased muscle performance resulting from an increased pain
threshold
an increase in pH within the muscle fibers affecting storage of
glycogen
a decline in pH within the muscle altering enzyme activities
an increase in metabolic reserves within the muscle fibers
10. Which of the following could cause muscle atrophy? 1X1
A. wearing a cast on a broken limb
B. a lack of regular stimulation of muscle fibers
C. paralysis
D. all of the above
11. Cardiac muscle has the feature of automaticity, which is the ability to contract without neural stimulation. Which of
the following statements accurately explains this unique feature? 1X1
A. Specialized pacemaker cells within the heart determine the rate of contraction of heart muscle.
B. Calmodulin interacting with calcium and myosin light chain kinase triggers interactions between actin and myosin.
C. The heart is full of fast muscle fibers and can contract quickly enough not to require neural stimulation.
D. Because cardiac muscle is not under voluntary control, it does not respond to neural stimulation.
E. None of the above.
12 Layers of smooth muscle in the reproductive tract of the female are important in:. 1X1
A. movement of oocytes
B. movement of sperm if present
C. expelling of the fetus at
delivery
D. all of the above
13. The order of the sequential-cyclic reactions that occur at an active site during cross-bridging is: 1X1
A. attach, detach, pivot, return
B. attach, return, pivot, detach
C. attach, pivot, detach, return
D. attach, return, detach, pivot
14. Which of the following would not be an effective source of energy for muscle contraction? 1X1
A. DNA
B. ATP
C. creatine
D.glycogen
15. On average, girls have smaller muscles and therefore less muscle mass than boys. Which hormones cause this
difference between girls and boys? 1X1
A. growth hormone and testosterone
B. epinephrine and thyroid hormone
C. thyroid hormone and growth hormone
D. epinephrine and testosterone
16. How would an elevated level of thyroid hormone in the body affect skeletal muscles? 1X2
17. In isometric contraction, the muscle does not change in length.
A. True
B. False
18. The bacteria Clostridium botulinum produces a toxin that prevents the release of ACh at the synaptic terminals. The
resulting disease is botulism. Explain how the activity of the toxin causes the paralysis associated with botulism. 1x2