Histolgy Of Muscles

Question 1

——% of the body weight is muscle

Answer 1

40

Question 2

Covering around single fiber/cell

Answer 2

Endomysium

Question 3

Around a bundle
of fibers

Answer 3

Perimysium

Question 4

Covers the entire
skeletal muscle

Answer 4

Epimysium

Question 5

Muscle growth occurs via

Answer 5

Hypertrophy

Question 6

Myofibrils are separated by :

Answer 6

Sarcoplasmic reticulum

Question 7

Contractile organelles of skeletal muscles :

Answer 7

Myofibrils

Question 8

Functional units of a muscle

Answer 8

Sarcomeres

Question 9

Each sarcomere is separated from
the next by

Answer 9

Z discs

Question 10

is the part of the sarcomere
composed of thick (myosin) and thin
(actin) filaments

Answer 10

A band

Question 11

is the part of the sarcomere that
contains only thin (actin) filaments

Answer 11

I Band

Question 12

is the part of the A band
that contains only thick filaments
(myosin)

Answer 12

H zone

Question 13

the middle of the sarcomere
and is composed of supporting proteins
that hold the thick filaments together

Answer 13

M line

Question 14

Contractile proteins
Of Myofibrils

Answer 14

myosin and actin

Question 15

Regulatory proteins which turn contraction
on & off
Of Myofibrils

Answer 15

troponin and tropomyosin

Question 16

Structural proteins which provide proper
alignment, elasticity and extensibility

Answer 16

titin, myomesin, nebulin and dystrophin

Question 17

T/F: The sarcoplasmic reticulum is invaginations of the
sarcolemma that penetrate
deeply into the musclefiber
around all myofibrils

Answer 17

False t tubules

Question 18

—————permit rapid
transmission of the action
potential into the cell,

Answer 18

T tubules