Anat Muscle Contract Vocab

Question 1

Sarcolemma

Answer 1

Cell membrane

Question 2

T-tubules

Answer 2

Membranous channel that extends inward from cell membrane

Question 3

Sarcoplasm

Answer 3

Cytoplasm in muscle fiber

Question 4

Sarcoplasmic reticulum

Answer 4

Membranous network of changes and tubules within a muscle fiber

Question 5

Myoglobin

Answer 5

Pigmented compound in muscle tissue that stores oxygen

Question 6

Myofibril

Answer 6

Contractile fibers within muscle cell

Question 7

Sacromere

Answer 7

Structural and functional unit of a Myofibril

Question 8

Myosin

Answer 8

Protein with actin

Question 9

Actin

Answer 9

Thin

Question 10

Myosin binding site

Answer 10

Myosin head binds to actin

Question 11

Tropomyosin

Answer 11

Block muscle contraction until calcium ion are present, prevent myosin and actin from touching, long line

Question 12

Troponin

Answer 12

Functions same as Tropomyosin

Question 13

Neuromuscular junction

Answer 13

Synapse btw motor neuron n skeletal muscle fiber

Question 14

Origin

Answer 14

the attachment site that doesn’t move during contraction

Question 15

Insertion

Answer 15

the attachment site that does move when the muscle contracts.

Question 16

Power stroke

Answer 16

involves the return of the myosin head to its low-energy conformation. The powerstroke generates force, pulling the thin filament toward the center of the sarcomere.

Question 17

Muscle fiber

Answer 17

Muscle cell