Topic 7 Muscular System: Muscular System

Question 1

• Muscle contraction can result in movement, stabilization of position, movement of substances throughout the body, and generation of body heat
• The muscular system consists of contractile fibers held together by connective tissue, and muscles covered by a loose connective tissue known as fascia.

Answer 1

Note

Question 2

• Skeletal, cardiac, and smooth

Answer 2

Types of Muscle

Question 3

• Involved in voluntary movement and contain fibers with multinucleate cells

Answer 3

1. Skeletal Muscle (striated muscle)

Question 4

a. Myofibrils
b. Sarcomeres
c. Sarcoplasm Reticulum
d. Sarcoplasm
e. Sarcolemma
f. Mitochondria

Answer 4

Types of Skeletal Muscle

Question 5

• Contain microfilaments divided into sarcomeres

Answer 5

a. Myofibrils

Question 6

• Individual contractile units separated by a border (Z-line)

Answer 6

b. Sarcomeres

Question 7

• Stores Ca2+ and surrounds myofibrils

Answer 7

c. Sarcoplasm Reticulum

Question 8

• Same thing as cytoplasm

Answer 8

d. Sarcoplasm

Question 9

• Plasma membrane of muscle cells that can propagate action potentials
  a. Invaginated by T-tubules: these are channels for ion flow
  b. Muscle cell/ muscle fiber: sarcolemma wraps several myofibrils together to form this

Answer 9

e. Sarcolemma

Question 10

• Present in large amounts in myofibrils

Answer 10

f. Mitochondria