Exam 1 Part 1

Question 1

Functions of skeletal muscle:

Answer 1

• Movement
• Stability
• Communication
• Control of body openings and passage ways
• Heat production

Question 2

With bones & joints forms the ___________ system by means of which body movements occur

Answer 2

Musculoskeletal

Question 3

The basic structural unit of a muscle is the:

Answer 3

Muscle fiber (cell) aka myofibril

Question 4

Muscle fibers are grouped into bundles known as:

Answer 4

Fasciculi

Question 5

Muscle fibers and fasciculi are bound together by:

Answer 5

Connective tissue

Question 6

Function of connective investment of muscle

Answer 6

• Connect muscle to bone or other structures
• Provides a pathway for nerves & blood vessels to reach the muscle fiber
• Provide a non contractile framework which allows the contraction of a muscle fiber to be transmitted to bone.

Question 7

What are the 3 layers of connective tissue:

Answer 7

• Endomysium
• Perimysium
• Epimysium

Question 8

Delicate connective tissue sheath which surrounds each individual muscle fiber and connects it to adjacent fibers

Answer 8

Endomysium

Question 9

More dense layer which surrounds each fasciculi and divides the muscle into a series of separate compartments

Answer 9

Perimysium

Question 10

Dense layer of connective tissue which surrounds the entire muscle and separates the muscle from surrounding tissue, organs, and other muscles.

Answer 10

Epimysium

Question 11

The _________ is continuous with deep fascia in the area and will continue as the tendon of the muscle

Answer 11

Epimysium

Question 12

Muscle fibers are extremely long and ___________ , with the nuclei arranged around the _________ of the fiber.

Answer 12

Multi-nucleated; Periphery

Question 13

Each fiber contains dozens to hundreds of _________

Answer 13

Myofilaments

Question 14

Contractile unit of the muscle

Answer 14

Myofilament

Question 15

Each fiber is contained within a tough, specialized membrane known as the;

Answer 15

Sarcolemma

Question 16

Under most circumstances the increase in the size of a muscle is due to an increase in the size of the _______ ______

Answer 16

Individual fiber

Question 17

Term to describe an increase in the size of a muscle, which is due to an increase in the size of each individual muscle fiber.

Answer 17

Hypertrophy

Question 18

Term used to describe an increase in the size of a muscle due to an actual increase in the number of muscle fibers.

Answer 18

Hyperplasia

Question 19

Term used to refer to the cytoplasm of a muscle fiber. Determines the darkness of a muscle (while is it a dark or light muscle)

Answer 19

Sarcoplasm

Question 20

• Found in muscles where long, sustained or continuous contraction are required (posture, Respiratory, Etc..)
• Associated with endurance activities
• higher levels of continuous metabolic activity

Answer 20

Type I fibers (Dark)

Question 21

• Found in quick, more powerful activities and so related to speed and strength (sprinting, weight lifting)

Answer 21

Type II fibers (light)

Question 22

Muscle fibers associated with AEROBIC metabolism

Answer 22

Type I fibers

Question 23

Muscle fibers associated with ANAEROBIC metabolism

Answer 23

Type II fibers

Question 24

Mixture of both type I and type II fibers

Answer 24

Intermediate fibers