I've already answered all of the questions I just really want to check and make sure they're right before I turn it in. It's only 10 questions..please help!!
1. Interactions between actin and myosin filaments of the sarcomere are responsible for
a. muscle fatigue
b. the conduction of neural information to the muscle fiber
c. muscle contraction
d. muscle relaxation
2. At rest, active sites on actin are covered by
a. myosin molecules
b.troponin molecules
c. tropomyosin molecules
d. calcium ions
3. Each skeletal muscle fiber is controlled by a neuron at a single
a. sarcolemma
b. sarcomere
c. neuromuscular junction
d. synaptic cleft
4. The _______ contains vesicles filled with acetylcholine.
a. synaptic knob
b. motor end plate
c. neuromuscular junction
d. synaptic cleft
5. The space between the neuron and the muscle is the
a. synaptic knob
b. motor end plate
c. motor unit
d. synaptic cleft
6. Depolarization of the sarcolemma involves the release of
a. calcium
b. sodium
c. potassium
d. chloride
7. The _____ contains receptors for acetylcholine
a. motor end plate
b. sarcomere
c. troponin
d. tropomyosin
8. Myosin heads attach to the active sites of troponin when exposed
a. true
b. false
9. The sarcoplasmic reticulum contains extremely high levels of sodium
a. true
b. false
10. Acetylcholine esterase inhibits further depolarization of the sarcolemma
a. true
b. false
My answers are:
1. c.
2. c.
3. c.
4. a.
5. d.
6. a.
7. a.
8. a.
9. b.
10. a.
1. Interactions between actin and myosin filaments of the sarcomere are responsible for
a. muscle fatigue
b. the conduction of neural information to the muscle fiber
c. muscle contraction
d. muscle relaxation
2. At rest, active sites on actin are covered by
a. myosin molecules
b.troponin molecules
c. tropomyosin molecules
d. calcium ions
3. Each skeletal muscle fiber is controlled by a neuron at a single
a. sarcolemma
b. sarcomere
c. neuromuscular junction
d. synaptic cleft
4. The _______ contains vesicles filled with acetylcholine.
a. synaptic knob
b. motor end plate
c. neuromuscular junction
d. synaptic cleft
5. The space between the neuron and the muscle is the
a. synaptic knob
b. motor end plate
c. motor unit
d. synaptic cleft
6. Depolarization of the sarcolemma involves the release of
a. calcium
b. sodium
c. potassium
d. chloride
7. The _____ contains receptors for acetylcholine
a. motor end plate
b. sarcomere
c. troponin
d. tropomyosin
8. Myosin heads attach to the active sites of troponin when exposed
a. true
b. false
9. The sarcoplasmic reticulum contains extremely high levels of sodium
a. true
b. false
10. Acetylcholine esterase inhibits further depolarization of the sarcolemma
a. true
b. false
My answers are:
1. c.
2. c.
3. c.
4. a.
5. d.
6. a.
7. a.
8. a.
9. b.
10. a.