Chapter 7: Muscular System

Question 1

Basic functional unit of contraction of skeletal muscle

Answer 1

Sacromere

Question 2

Which is not a muscle that moves the upper extremities

Answer 2

Rectus abdominus

Question 3

Which is considered voluntary muscle

Answer 3

Skeletal

Question 4

Which is not a type of muscle

Answer 4

Myosin (cardiac, smooth, skeletal)

Question 5

Primary functions of skeletal muscle include all except

Answer 5

Line walls of hollow organs

Question 6

Connects muscle to bone

Answer 6

Tendons

Question 7

A single neuron and the muscle fibers it stimulates

Answer 7

A motor unit

Question 8

The point a nerve fiber contacts a muscle cell

Answer 8

Neuromuscular junction

Question 9

Muscle capacity to shorten and thicken

Answer 9

Contractibility

Question 10

Muscle capacity to transmit electrical current

Answer 10

Excitability

Question 11

Two proteins of muscle fiber threads or filaments

Answer 11

Actin and myosin

Question 12

Do muscles pull or push

Answer 12

Pull

Question 13

Muscle contractions require energy in the form of ____

Answer 13

ATP

Question 14

What mineral is needed for muscle contraction

Answer 14

Calcium

Question 15

To produce ATP muscle cells must have ____

Answer 15

Oxygen and nutrients

Question 16

Which is not a benefit of exercise

Answer 16

Muscle atrophy

Question 17

Two types of muscle contractions

Answer 17

Isotonic and isometric

Question 18

Two forms of isotonic contractions

Answer 18

Eccentric and concentric

Question 19

During eccentric contractions muscles ___

Answer 19

Lengthen

Question 20

The main muscle that performs a given movement

Answer 20

Prime mover

Question 21

The two types of muscle attachments of tendons to bones

Answer 21

Origin and insertion

Question 22

Possible causes of muscle fatigue include all except

Answer 22

Anemic deniability

Question 23

During isometric contractions muscle ___ does not change

Answer 23

Length

Question 24

The muscle that makes up my hidden 6-pack

Answer 24

Rectus abdominus

Question 25

The longest muscle of the human body

Answer 25

Sartorius