Muscles

Question 1

Largest Muscle

Answer 1

Gluteus maximus

Question 2

Strongest muscle by weight

Answer 2

Masseter

Question 3

Intrafusal

Answer 3

Intrafusal
Muscle length
Gamma motor neurons

Question 4

Extrafusal

Answer 4

Extrafusal
Contractions
Alpha motorneurons

Question 5

Type 1 Skeletal Muscle

Answer 5

Slow
Red
Oxidative Phosphorylation
Sustained contraction
High mitochondria
Endurance Training

Question 6

Type 2 Skeletal Muscle

Answer 6

Fast
White
Anaerobic Glycolysis
Low mitochondria, myoglobin
Weight training
Resistance training
Sprinting

Question 7

Cardiac muscles

Answer 7

Atrial muscles: (+) Gap, (+) syncytium
Ventricular muscles: (+) Gap, (+) syncytium
Pacemakers (+) authorhythmicity

Question 8

Smooth muscles

Unitary SM

Answer 8

(+) Gap junctions (+) Syncytium

GROSS MOTOR

Question 9

Smooth muscle

Multiunit SM

Answer 9

(-) Gap junction

FINE MOTOR

Question 10

Functional and Structural unit of a muscle of skeletal and cardiac muscle

Answer 10

Sarcomere

Question 11

Area between 2 Z lines

Answer 11

Sarcomere

Question 12

Attaches troponin complex to tropomyosin

Answer 12

Troponin T

Question 13

Inhibits actin myosin binding

Answer 13

Troponin I

Question 14

Calcium binding protein

Answer 14

Troponin C

Question 15

Which filament contains Myosin that acts as a cross bridge of the sarcomere
1 Heavy 2 Light
2 Heads 1 Tail

Answer 15

Thick Filament

Question 16

Which filament contains actin, tropomyosin and troponin

Answer 16

Thin Filaments

Question 17

Stabilizes sarcolemma and prevents contraction induced rupture

Answer 17

Dystrophin

Question 18

Binds actin to z lines

Answer 18

Actinin, CapZ protein

Question 19

Binds Z line to sarcolemma

Answer 19

Desmin

Question 20

Acts a a molecular ruler that sets the length of actin

Answer 20

Nebulin

Question 21

Borders

Answer 21

Z line

Zwischenscheibe

Question 22

Midline

Answer 22

M Line

Mittelscheibe

Question 23

Entire length of myosin

Answer 23

A Band

Anisotropic

Question 24

Inside A band; purely myosin no actin

Answer 24

H band

Heller

Question 25

Inside H Band, no myosin

Answer 25

Bare zone

Question 26

Purely actin, no myosin

Answer 26

I band

Isotropic

Question 27

Invaginations of the sarcolemma; spreads the action potential to all parts of the muscles; contains DHPR

Answer 27

T Tubules

Question 28

Voltage sensitive, activates Ryanodine receptors

Answer 28

DHPR

Question 29

Contains Ca needed for muscle contraction

Answer 29

Sarcoplasmic reticulum

Question 30

Ca release channel in the SR activated by DHPR

Answer 30

Ryanodine

Question 31

Protein that stores Ca in the SR

Answer 31

Calsequestrin

Question 32

Pumps Ca from ICF to the SR

Answer 32

SERCA

Question 33

Binds myosin to Z lines, binds Z lines to M line

This determines normal stiffness of the ventricular muscle

Answer 33

Titin

Question 34

Drug that blocks the release of Ach from presynaptic terminals

Answer 34

Botulinum toxin

Question 35

Drug that competes with Ach receptors in Motor End Plates

Answer 35

Curare

Question 36

Inhibits Acetylcholinesterase

Answer 36

Reversible - Neostigmine (Carbamates)

Irreversible - Organophosphates

Question 37

Drug that blocks reuptake of Choline into the presynaptic terminal

Answer 37

Hemicholinum

Question 38

Smooth Muscles
Phosphorylates and activates myosin heads
Causes smooth muscle contractions

Answer 38

Myosin Light Chain Kinase

MLCK

Question 39

Smooth Muscles
Dephosphorylates and inactivates myosin heads
Causes smooth muscle relaxation

Answer 39

Myosin Light Chain Phosphatase

MLCP