Muscle dt

Question 1

sac like regions of sarcoplasmic reticulum that contain calcium ions

Answer 1

terminal cisternae

Question 2

plasma membrane of muscle cell

Answer 2

sarcolemma

Question 3

a group of one T tubule lying between two adjacent terminal cisternae

Answer 3

triad

Question 4

invaginations of the sarcolemma that project deep into the cell

Answer 4

T tubule

Question 5

interconnecting tubules of endoplasmic reticulum that surround each myofibril

Answer 5

sarcoplasmic reticulum

Question 6

contains the genetic material of the cell

Answer 6

nucleus

Question 7

contains the contractile filaments within the skeletal muscle cell

Answer 7

myofibril

Question 8

site of ATP synthesis; powerhouse of the cell

Answer 8

mitochondrion

Question 9

the intracellular fuid in which the organelles are suspended and molecules and ions are dissoved

Answer 9

cytosol

Question 10

alternative name for skeletal muscle cells

Answer 10

muscle cell or fiber

Question 11

muscle smallest to larget

Answer 11

myofilament
myofibral
muscle fiber
fascicle
muscle

Question 12

a thin filament in a myofibral

Answer 12

actin

Question 13

thick filament in a myofibral

Answer 13

myosin

Question 14

corresponds to the length of the thick filament

Answer 14

a band

Question 15

contains only thin filaments and the width if the distance between adjacent thick filament

Answer 15

I band

Question 16

located in the center of the dark band and corresponds to the region between thin filament. width varies depending upon the degree of muscle contration

Answer 16

H zone

Question 17

a zigzag line bisecting the I band and anchors the thin filaments and connects adjacent myofibrils

Answer 17

Z line

Question 18

the contractile unit of the myofilament and extends from one z line to the next z line

Answer 18

sarcomere

Question 19

Located in the center of the h zone and connects neighboring myosin filaments

Answer 19

M line