Chapter 8

Question 1

Function of Muscle Tissue

Answer 1

Contracting (shortening) to produce movement/ heat production/ posture

Question 2

Skeletal Muscle

Answer 2

Attaches to and moves the skeleton/ long cells found in bundles/ striated/ voluntary

Question 3

Cardiac Muscle

Answer 3

Found only in the heart/ striated/ contains intercalated disks/ involuntary

Question 4

Smooth Muscle

Answer 4

Located in the hollow organs of the body/ moves materials thru organs (peristalsis)/ can alter diameter. shorter tapering cells/ nonstriated/ involuntary

Question 5

How Skeletal Muscles Produce Movement

Answer 5

Fascicles are groups of cells coated in connective tissue (Fascia) which is then connected to the tendons which anchor muscles to bones

Question 6

Origin

Answer 6

Is the attachment of muscle to the more stationary bone. It is the non moving end of a muscle

Question 7

Insertion

Answer 7

Is the attachment of the muscle tendon the moving bone. This part generally moves towards the origin

Question 8

Belly or Body

Answer 8

Is the fleshy portion of the muscle between the insertion and the origin

Question 9

Prime Mover

Answer 9

Is the muscle that contracts and produces the desired movement

Question 10

Synergists

Answer 10

Muscles that assist the prime mover

Question 11

Antagonist

Answer 11

Muscle that must relax or lengthen while the prime mover contracts

Question 12

Muscle Fibers

Answer 12

Multinucleated, long, cylindrical cells and they lie parallel to each other (bundled)

Question 13

Thick and Thin Myofilaments

Answer 13

Are the smaller structures within the muscle fibers

Question 14

Sarcomeres

Answer 14

Bundles of structures made up of thick and thin myofilaments/ they are ultimately responsible for muscle movement

Question 15

Thick Myofilaments Contain

Answer 15

Myosin

Question 16

Thin Myofilaments Contain

Answer 16

Actin