Muscular System

Question 1

three types of muscle tissue?

Answer 1

skeletal, smooth, and cardiac

Question 2

functions of muscular system:

Answer 2

M - movement of body
M - Maintenance of posture
R - respiration
P - production of body heat
C - communication
C - constriction of organs and vessels
C - contraction of the heart

Question 3

four major functional characteristics of muscular system

Answer 3

contractility
excitability
extensibility
elasticity

Question 4

______ contributes approximately 40% of body weight`

Answer 4

skeletal muscle

Question 5

skeletal muscles’ three layers of connective tissue

Answer 5

1. epimysium
2. perimysium
3. endomysium

Question 6

forms connective tissue sheath that surrounds each skeletal muscle

Answer 6

epimysium

Question 7

subdivides each whole muscle into numerous visible bundles of muscle fibers

Answer 7

perimysium

Question 8

the visible bundles of muscle fibers are called

Answer 8

fascicles

Question 9

layer of connective tissue that separate individual muscle fibers within each fasicle

Answer 9

endomysium

Question 10

they attach muscle to bone

Answer 10

tendons

Question 11

two main aspects of muscle contraction

Answer 11

electrical component
mechanical component

Question 12

what are the three muscle fiber components that respond to and transmit electrical signal

Answer 12

sarcolemma, transverse tubules, and sarcoplasmic reticulum

Question 13

the cell membrane of muscle fibers

Answer 13

sarcolemma

Question 14

tubelike inward folds of the sarcolemma

Answer 14

T-Tubules/Transverse tubules

Question 15

highly specialized smooth endoplasmic reticulum in skeletal muscle fibers

Answer 15

sarcoplasmic reticulum

Question 16

enlarged portions of sarcoplasmic reticulum

Answer 16

terminal cisternae

Question 17

two terminal cisternae and its associated t-tubules form what we call ____

Answer 17

triad

Question 18

cytoplasm of muscle

Answer 18

sarcoplaasm

Question 19

two structures in mechanical component

Answer 19

1. myofibrils
2. myofilaments

Question 20

bundles of protein filaments

Answer 20

myofibrils

Question 21

two types of myofilaments are?

Answer 21

actin myofilaments
myosin myofilaments

Question 22

structural and functional unit of skelal muscles

Answer 22

sarcomeres

Question 23

form a stationary anchor for actin myofilaments

Answer 23

z disk

Question 24

the darker staining band in the center or each sarcomere

Answer 24

A Band

Question 25

the two light stained regions in a sarcomere

Answer 25

I- Band

Question 26

the center of each A band has a smaller band called ______ and contains only myosin filaments

Answer 26

H Zone

Question 27

the middle of the H zone

Answer 27

m line