Chapter 10 Test Review

Question 1

6 Functions of Skeletal Muscle Tissue

Answer 1

Movement
Posture and position
Support soft tissues
Guards entrances and exits
Maintain body temp
Store nutrient reserves

Question 2

Actin and myosin

Answer 2

Thin and thick myofilament

Components of the sarcomere structure

Responsible for muscle contraction

Question 3

Sarcolemma

Answer 3

Penetrates into the cell interior forming the t-tubules

Question 4

Sarcomere

Answer 4

Repeating units of myofilaments

Contractile units of muscle fibers

Question 5

Myofibrils

Answer 5

Extend the entire length of the muscle fiber

Each muscle contains thousands

Question 6

Z lines

Answer 6

Dark thin bands across striated muscle that mark the junction of actin myofilaments in adjacent sarcomeres

Question 7

Epimysium

Answer 7

Fibrous tissue encasing skeletal muscle

Question 8

Perimysium

Answer 8

Connective tissue surrounding a bundle of muscle fibers

Question 9

Endomysium

Answer 9

Layer of areolar tissue that encases each individual muscle fiber

Contains capillaries and nerves

Question 10

Motor unit

Answer 10

A single motor neuron plus the muscle fibers it innervates

Large powerful muscles have large motor units

Muscles that require fine control have small motor units

Question 11

Recruitment

Answer 11

As greater force is needed, more motor units are activated

Question 12

Excitation-contraction coupling

Answer 12

Process of converting an electrical stimulus to a mechanical response

Link between the action potential generated in the sarcolemma and the start of a muscle contraction