Ugh Work

Question 1

What chemical helps to regenerate ATP?

Answer 1

Creatine phosphate

Question 2

Skeletal muscles are responsible for moving ___________

Answer 2

Bones

Question 3

Muscle fibers are made of individual fibers (not filaments) called ___________

Answer 3

Myofibrils

Question 4

Connective tissue that surrounds fascicles is ___________

Answer 4

Perimysium

Question 5

Poisons such as botulism that prevent the release of acetylcholine would cause muscles to ____________

Answer 5

Become paralyzed

Question 6

What type of muscles are: Primarily voluntary ___________ Found in the heart ___________ Found in the digestive tract ___________

Answer 6

Skeletal muscle

Cardiac muscle

Smooth muscle

Question 7

What neurotransmitter is associated with the muscles?

Answer 7

Acetylcholine

Question 8

What cell organelle provides the ATP needed for muscle activity?

Answer 8

Mitochondrion

Question 9

The gap between the nerve and the muscle is called the ___________

Answer 9

Synaptic cleft

Question 10

What is hypertrophy? Atrophy?

Answer 10

Hypertrophy: Increase in muscle size

Atrophy: Decrease in muscle size

Question 11

A person who has a disease that inhibits the production of cholinesterase would have what kind of symptoms?

Answer 11

Prolonged muscle contraction or spasm

Question 12

Cholinesterase is an enzyme that breaks down ___________

Answer 12

Acetylcholine

Question 13

During a muscle contraction, cross-bridges form between what two structures?

Answer 13

Myosin and actin

Question 14

In a sarcomere, the I band is made of ___________ and the A band is made of ___________

Answer 14

I band: Actin

A band: Myosin

Question 15

The dark and light fibers of the muscles give cells a ___________ appearance.

Answer 15

Striated

Question 16

The energy source for muscle contraction is ___________

Answer 16

ATP

Question 17

Vesicles in the motor neuron store what substance?

Answer 17

Acetylcholine

Question 18

When recruitment occurs, the number of motor units being activated [decrease / increase].

Answer 18

Increase

Question 19

Sustained contraction of individual fibers, even when muscle is at rest is known as ___________

Answer 19

Muscle tone

Question 20

The immovable end of the muscle is the ___________

Answer 20

Origin

The movable end of the muscle is the ___________

Question 21

Muscle fatigue is likely due to a buildup of ___________

Answer 21

Lactic acid

Question 22

A sarcomere is defined as the region between two ___________

Answer 22

Z lines

Question 23

The condition where a body becomes stiff after death is called ___________

Answer 23

Rigor mortis

Question 24

When ATP has been used, it becomes ___________

Answer 24

ADP (Adenosine diphosphate)

Question 25

What is a motor unit?

Answer 25

A motor neuron and all the muscle fibers it controls

Question 26

Myofibrils are composed of ___________

Answer 26

Myofilaments (actin and myosin)

Question 27

The muscle fiber membrane is specialized to form a ___________ at the neuromuscular junction.

Answer 27

Motor end plate

Question 28

Which type of connective tissue surrounds fascicles (bundles)? ___________

Answer 28

Perimysium ## Footnote What type of tissue surrounds the entire muscle? ___________

Question 29

The substance that crosses the gap between a neuron and a muscle fiber is the ___________

Answer 29

Acetylcholine

Question 30

Tendons connect ___________ to ___________

Answer 30

Muscle to bone

Question 31

Bundles of muscle fibers are called ___________

Answer 31

Fascicles

Question 32

The minimum amount of stimulus required for a muscle contraction to occur is the ___________

Answer 32

Threshold stimulus

Question 33

What model explains how muscles contract?

Answer 33

Sliding filament model

Question 34

The A bands are [light / dark], whereas the I bands are [light / dark].

Answer 34

A bands: Dark ## Footnote I bands: Light

Question 35

The muscle fiber membrane is called the ___________

Answer 35

Sarcolemma ## Footnote The transport network of the muscle is called the ___________