Day 8/9 Muscle Tissue

Question 1

Skeletal Muscle characteristics

Answer 1

striated, multi-nucleated

Question 2

Cardiac muscle characteristics

Answer 2

striated, mono nucleated

Question 3

smooth muscle characteristics

Answer 3

not striated, mono nucleated

Question 4

Muscle levels of organization?

Answer 4

Sarcomere - sarcoplasmic reticulum - myofibril - fiber - fascicle

Question 5

Epimysium is

Answer 5

dense regular CT covering muscle fascicles

Question 6

Perimysium is

Answer 6

dense regular CT covering muscles fibres

Question 7

Endomysium is

Answer 7

dense regular to areolar CT covering myofibrils

Question 8

thick filaments are

Answer 8

myosin

Question 9

thin filaments are

Answer 9

actin

Question 10

titin is

Answer 10

protein that anchors myosin to Z line

Question 11

Sarcomeres are

Answer 11

functional units of muscle

highly organized protein structures

Question 12

contractile proteins

Answer 12

myosin, actin

Question 13

non contractile proteins

Answer 13

troponin, tropomyosin, titin

Question 14

Sarcoplasmic reticulum is? and important of

Answer 14

releases calcium for contraction. allows muscle impulse to travel deep into the muscle, so whole fibre completely contracts. message to contract comes through neurally.

Question 15

where exactly is calcium stored in SR

Answer 15

Terminal Cisternae

Question 16

What are T-Tubules

Answer 16

stimulus for contraction travels down them from the sarcolemma, to the terminal cisternae