Muscles

Question 1

What are the connective tissue layers of a skeletal muscle?

Answer 1

1. Epimysium - surrounds entire muscle
2. Perimysium - surrounds fascicles
3. Endomysium - surrounds individual cells

Question 2

Band without myosin

Answer 2

L-band

Question 3

Cytoplasm of a myocyte

Answer 3

Sarcoplasm

Question 4

What is The Triad?

Answer 4

Where the T-Tubule meets with the Sarcoplasmic Reticulum on either side

Question 5

Label the things

Answer 5

Question 6

label the things

Answer 6

Question 7

How are the various connective tissue layers of the muscle connected to each other?

Answer 7

Fibers from the endomysium and perimysium are woven into each other.

All three come together at the end of the muscle to form a tendon or aponeurosis

Question 8

Perimysium

Answer 8

• Surrounds muscle fascicles
• Connective tissue with collagin and elastic fibers
• Contains nervs and blood vessels

Question 9

What are thick filaments made of?

Answer 9

A bunch of myosin

Question 10

Z-line

Answer 10

Where the actin molecules are bound together

Question 11

Muscle contraction where length changes

Answer 11

Isotonic

Question 12

acetylcholine

Answer 12

flat sheet of connective tissue that connect flat sheets of muscle (abdominal)

Question 13

Which neurotransmitter is used in the neuromuscular junction?

Answer 13

Acetylcholine (ACh)

Question 14

Parts of a muscle twitch (over time)

Answer 14

Question 15

Which two proteins make up myofibrils?

Answer 15

1. Actin
2. Myosin

Question 16

Lable the things!

Answer 16

Question 17

Treppe

Answer 17

Muscle gets stimulated quickly enough that the peak of the contraction phase keeps getting higher, but the muscle is allowed to fully relax inbetween twitches.

Question 18

What is the part of the sarcomere where the thin and thick filaments overlap?

Answer 18

Crossbridge

Question 19

Fluid surrounding cells

Answer 19

Interstitial fluid

Question 20

Molecule that can store energy for 15 seconds

Answer 20

Creatine phosphate (CP)

Question 21

One muscle stimulation is called:

Answer 21

A twitch

Question 22

What is the border between sarcomeres called?

Answer 22

Z-line

Question 23

Line where actin filaments are attached

Answer 23

M-line

Question 24

Steps in cellular respiration

Answer 24

Question 25

Which part of the sarcoplasmic reticulum is in contact with the transverst tubules?

Answer 25

The Terminal Cisterna

Question 26

Basic formula for cellular respiration

Answer 26

O₂ + glucose → ATP + CO₂ + H₂O

Question 27

How does calcium get from the sarcoplasmic reticulum to the myofibrils?

Answer 27

Voltage gated calcium channels

Question 28

Endomysium

Answer 28

* Surrounds individual muscle cells (fibers) * Contains satellite cells, capillaries, and nerves * Areolar connective tissue

Question 29

Stretchy molecule that binds the tips of the Myosin molecules to the Z line

Answer 29

Titin

Question 30

Incomplete tetanus

Answer 30

Muscle stimulation comes quick enough that the relaxation period starts getting shorter.

Question 31

How does calcium allow actin to pull the myosin along?

Answer 31

Calcium (Ca²⁺) binds to Troponin complex, pulling Tropomyosin out of the way of the Myosin binding sites on the Actin.

Question 32

What are the steps of the "sliding fillament thingy" that use ATP?

Answer 32

Unactivated Myosin + ATP → activated Myosin Activated Myosin + Actin → MOVEMENT Post movemente Myosin + ATP → unactivated Myosin

Question 33

M-Line

Answer 33

Where Myosin molecules are bound together

Question 34

Label the things!

Answer 34

Question 35

What are thin filaments made of?

Answer 35

Two strands of Actin, twisted with Tropomyosin, smattered with Troponin

Question 36

Tetanus

Answer 36

Stimulation rate increases until the relaxion phase disapears

Question 37

Basic unit of muscle contraction

Answer 37

Sarcomere

Question 38

Actin and Myosin are:

Answer 38

Myofilaments

Question 39

Connective tissue connecting muscle to muscle

Answer 39

Aponeurosis

Question 40

Pump that maintains normal membrane potential

Answer 40

Na+/K+ ATPase (maintains higher sodium outside and higher potassium inside)

Question 41

bundle of muscle fibers controlled by the same nerve

Answer 41

motor unit

Question 42

Epimysium

Answer 42

* Surrounds muscle organ * Connected to deep fascia * Dense irregular CT

Question 43

Holds actin strands together

Answer 43

nebulin

Question 44

Band with myosin

Answer 44

A-band

Question 45

Cell membrane of a myocyte

Answer 45

Sarcolemma

Question 46

Muscle contraction where length does not change

Answer 46

isometric