Muscle Review 1
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Name: _______________________________
Name the 3 muscle tissues, know appearance and function
How are muscles named?
Define agonist, synergist, antagonist, prime mover, fixator
Parts of skeletal muscle from biggest to smallest (muscle, fascicle, muscle fiber, myofibril and the
coverings)
Parts of sarcomere: z-line, actin, myosin, A-band, H-zone, I-band
Anterior and Posterior of human
Describe neuromuscular junction
Describe muscle contraction (love story of actin & myosin)
______1.
Which of these surrounds the individual muscle fiber?
a. perimysium
b. endomysium
c. epimysium
d. fascia
______2.
The primary function of skeletal muscle is:
a. movement of body extremities and locomotion
b. movement of contents through the visceral organs
c. production of heat
d. ensuring the operation of the heart
______3.
When the acetylcholine is released at the neuromuscular junction, it opens _____________
channels in the muscle cell.
a. Calcium (Ca)
b. Water
c. Potassium (K)
d. Sodium (Na)
______4.
The site where the motor nerve impulse is transmitted from nerve endings to the skeletal
muscle cell membranes are the:
a. Neuromuscular junctions
b. Sarcomeres
c. Myofilaments
d. Z lines
______5.
a.
b.
c.
d.
The ions that are released into the muscle cell during action potential generation are:
Hydrogen ions
Chloride ions
Calcium ions
Potassium ions
______6.
While doing jumping jacks your arms and legs move away from the midline of your body. This
motion is called:
a. Extension
b. Adduction
c. Flexion
d. Abduction
Label the following on the diagram and match them to their definition:
______1.
Epimysium
A. Bundle of muscle fibers
______2.
Perimysium
B. Connective tissue surrounding a muscle
______3.
Endomysium
C. Smaller fibers found in a muscle cell, composed of actin
______4.
Fascicle
______5.
Muscle
______6.
Muscle cell
______7.
Myofibril
and myosin
D. Connective tissue that surrounds a bundle of muscle
fibers
E. Also called muscle fiber
F. Connective tissue that surrounds an individual muscle
fiber
G. The entire collection of fascicles, surrounded by
epimysium