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Chapter 13 Spinal Control of Movement
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Chapter 13 Spinal Control of Movement
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Chapter Thirteen Spinal Control of Movement1. Which of the following is striated muscle? Choose the correct option.
A) Cardiac and skeletal muscle
B) Only skeletal muscle
C) Only cardiac muscle
D) Smooth muscle
2. Which of the following is a flexor of the elbow joint? Choose the correct option.
A) Triceps brachii and brachialis
B) Anconeus
C) Triceps brachii
D) Brachialis
3. Which muscles are specialized for the movement of the trunk? Choose the correct
option.
A) Distal muscles
B) Proximal muscles
C) Smooth muscles
D) Axial muscles
4. Why are lower motor neurons called the "final common pathway" for behavior control?
Choose the correct option.
A) They directly command muscle contraction.
B) They are the input of the motor system.
C) They integrate sensory and motor information.
D) They constitute the largest of the four main output pathways of the motor system.
5. Which muscles are innervated by the motor neurons, situated in the cervical
enlargement of the spinal cord? Choose the correct option.
A) Arm muscles
B) Thoracic muscles
C) Leg muscles
D) Neck muscles
6. What is sarcoplasmic reticulum (SR)? Choose the correct option.
A) Excitable cell membrane that encloses the muscle fiber
B) Extensive intracellular sac containing calcium ions
C) System of tubules that bring the action potential deep inside the muscle fiber
D) Voltage-sensitive channels
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