Final Exam Muscle Tissue Lecture

Question 1

What is a whole muscle surrounded by?

Answer 1

Epimysium

Question 2

What is a muscle fascicle surrounded by?

Answer 2

Perimysium

Question 3

What is a muscle fiber surrounded by?

Answer 3

Endomysium and Sarcolemma

Question 4

Combination of 3 layers which make up a tendon

Answer 4

Epimysium, Perimysium, Endomysium

Question 5

What line is Actin attached to?

Answer 5

Z-line

Question 6

What line is Myosin attached to?

Answer 6

M-line

Question 7

2 contractile proteins?

Answer 7

Actin
Myosin

Question 8

2 Regulatory proteins?

Answer 8

Troponin
Tropomyosin

Question 9

How many neuromuscular junctions are on one muscle fiber?

Answer 9

One

Question 10

What is the thin filament?

Answer 10

Actin

Question 11

What is the thick filament?

Answer 11

Myosin

Question 12

T-tubules are folds in what structure?

Answer 12

Sarcolemma

Question 13

Where does the calcium come from before it binds to Troponin?

Answer 13

Sarcoplasmic Reticulum

Question 14

How do muscles grow?

Answer 14

Sarcomeres are added

Question 15

What is muscular dystrophy?

Answer 15

weakening and breakdown of skeletal muscle

Question 16

What protein does Duchenne Muscular Dystrophy affect?

Answer 16

Dystrophin

Question 17

What is the functional unit of a muscle fiber?

Answer 17

Sarcomere

Question 18

4 things muscles are…

Answer 18

Excitable - they respond to stimuli
Contractile - they contract
Extensible - the extend
Elastic - they can return to their original size

Question 19

How many fibers does a motor neuron control in fine motor areas like the eye?

Answer 19

As little as two

Question 20

How many fibers can a motor neuron control where precision is not needed?

Answer 20

Up to 2000

Question 21

Where does a motor neuron divide to attach to muscle fibers?

Answer 21

At the terminal end

Question 22

What is recruitment?

Answer 22

When muscle motor units are needed to aid in contraction