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Systemic Anatomy Unit 2 > Muscular Tissue > Flashcards

Flashcards in Muscular Tissue Deck (42)
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1

Muscular tissue accounts for what percentage of total body mass?

40-50%

2

What are the three types of muscular tissue?

Skeletal
Cardiac
Smooth

3

What are the four functions of muscular tissue?

Producing body movements
Stabilizing body position
Control of body openings and passages
Producing heat

4

What are the five properties of muscular tissue?

Electrical excitability
Conductivity
Contractility
Extensibility
Elasticity

5

What is connected by tendons to the skeleton?

Body or belly of muscle.

6

_______ wraps around each myofiber.

Endomysium

7

_______ wraps multiple myofibers creating fascicle.

Perimysium

8

______ wraps around the entire muscle and extends beyond muscle to form tendon.

Epimysium

9

_____ wraps muscle group separating it from neighboring groups.

Fascia

10

How much of the heart's output does muscle receive while at rest?

1/4

11

How much of the heart's output does muscle receive during exercise?

3/4

12

What motor neurons are used to innervate muscle?

Somatic Motor Neurons

13

What is a myofiber?

Skeletal muscle cell

14

What does hypertrophy mean?

Increasing muscle size

15

Myofibers do not undergo ______.

Mitosis

16

The filaments are arranged in compartments called _______.

Sarcomeres

17

What causes the striated appearance of skeletal muscle?

The thick and thin filaments that overlap that consists of zones and bands.

18

What are the thick and thin filaments made of in the muscle?

Protein

19

What are the three proteins that build myofibrils?

Contractile Proteins
Regulatory Proteins
Structural Proteins

20

What is the major component of thick filaments?

Myosin

21

What is the major component of thin filaments?

Actin

22

What are the key structural proteins?

Titin
Myosin
Nebulin
Dystrophin

23

The first step of a nerve impulse is the release of _____.

Acetylcholine

24

The second step of nerve impulse is the activation of ____ _____.

Acetylcholine receptors

25

The third step of nerve impulse is the production of muscle ______ ______.

Action Potential

26

The fourth step of nerve impulse is the termination of ______ ______.

Acetylcholine Activity

27

An example of an autoimmune disease where the acetylcholine receptors are attacked by own impulse system is...

Myasthenia Gravis

28

What is released from the channels during the excitation-contraction coupling phase?

Calcium

29

What active transport pumps are used during the excitation-contraction coupling phase?

Calcium active transport pumps

30

During the contraction cycle, ATP _______ is the first step.

Hydrolysis