I. List the 3 types of muscles and one location of each
A.
B.
C.
II. Microscopic Anatomy of Skeletal Muscle
A. Muscle cells, also callec consist of long ribbon-like organelles called
B. Myofibrils are chains of contractile units called
C. Sarcomeres consist of 2 types of myofilaments: thin thick (
D. The . reticulum (SR) is another important organelle within muscle fibers.
The function of the SR is to store and release when the muscle fiber is stimulated to contract.
III. Skeletal Muscle Activity
A. The Neuromuscular Junction (NMJ)
The neuromuscular junction is where the long extension of a neuron, called an communicates with the muscle fiber.
a. One neuron and all of the muscle fibers it innervates is called:
b. Motor units vary ir
Activities at the NMJ
a. The electrical signal, called the travels down the axon of a neuron to the end called the axon
b. channels open and calcium the axon terminal.
c. Calcium entry causes the neurotransmitter to be released.
d. Acetylcholine diffuses across the (the space between the axon terminal and muscle fiber) and binds to acetylcholine receptors on the muscle fiber.
e. The binding of acetylcholine leads to an electrical impulse, action potential, in the muscle
f. Acetylcholine is broken down by the enzyme the muscle fiber goes back to rest.
List the 3 types of muscles and one location of each A. B. C. II. Microscopic Anatomy of Skeletal Muscle , consist of long ribbon-like A. Muscle cells,also called organelles called B. Myofibrils are chains of contractile units called )and C. Sarcomeres consist of 2 types of myofilaments: thin ( thick D. reticulum (SR) is another important The organelle within muscle fibers. when 1. The function of the SR is to store and release the muscle fiber is stimulated to contract. III. Skeletal Muscle Activity A. The Neuromuscular Junction (NMJ 1. The neuromuscular junction is where the long extension of a neuron, called an communicates with the muscle fiber. a. One neuron and all of the muscle fibers it innervates is called a b. Motor units vary in 2. Activities at the NMJ a. The electrical signal, called the travels down the axon of a neuron to the end called the axon
b.
channels open and calcium the axon terminal. C. Calcium entry causes the neurotransmitter to be released. d. Acetylcholine diffuses across the (the space between the axon terminal and muscle fiber and binds to acetylcholine receptors on the muscle fiber. e. The binding of acetylcholine leads to an electrical impulse action potential, in the muscle f. Acetylcholine is broken down by the enzyme an the muscle fiber goes back to rest.
