Exercise science

Question 1

SR

Answer 1

provides structural integrity
releases Ca -> action potential

Question 2

myofibril

Answer 2

consist of long thin chain of protein that contain myofilament
bunches of these make mm fiber

Question 3

myofilament

Answer 3

protein chains containing actin and myosin

Question 4

sarcomere

Answer 4

smallest functional unit
located between two z lines

Question 5

T tubular

Answer 5

perpendicular to myofibril and 2 sarcoplasmic channels
depolarizing Ca initiates contrile motion

Question 6

Ca does what and ATP does what

Answer 6

Ca binds to toponin which causes conformational change to tropomyosin which is covering actin’s head
ATP activates the power stroke

Question 7

what hormone activates at the terminal end of NMJ

Answer 7

ACh

Question 8

circular mm

Answer 8

arranced in a concentric ring

Question 9

convergent mm

Answer 9

mm has broad origin and it is fan or triangular shaped

Question 10

parallel mm

Answer 10

long axis of fascicles is parallel to long axis of mm

Question 11

unipennate mm

Answer 11

short fascicles insert obliquely int only one side of tendon
ext digi

Question 12

bipennate mm

Answer 12

fascicles insert into opposite sides of one central tendon
rectus

Question 13

multipennate mm

Answer 13

tendon branches w/in the mm
deltoid

Question 14

fusiform

Answer 14

spindle shaped mm bicep

Question 15

force velocity curve

Answer 15

as force increases velocity decreases

Question 16

peak power

Answer 16

30-80%