1.2.x

Question 1

Fascicle

Answer 1

Small bundle of muscle fibers (made of myofibrils)

Question 2

Sarcolemma/sarcoplasmic reticulum

Answer 2

Sarcolemma = cell membrane of a myocyte (muscle cell)
Sarcoplasmic reticulum = endoplasmic reticulum of a myocyte

Question 3

Myofibril

Answer 3

Thousands make up a myocyte; myofibrils are made up of sarcomeres (repeating units) and include thick/thin filaments (ie, myosin, tropomyosin, actin)

Question 4

Epimysium

Answer 4

Connective tissue surrounding entire muscle

Question 5

Endomysium

Answer 5

Connective tissue surrounding singular muscle fiber

Question 6

Perimysium

Answer 6

Connective tissue surrounding fascicle

Question 7

Muscle rules

Answer 7

1) At least 2 attachments
2) Crosses at least 1 joint
3) Only get shorter (contract)
4) Insertion = attachment that moves; origin = attachment that is stationary
5) Muscle that decreases angle = flexor; muscle that increases angle = extensor
6) Muscles work in opposing pairs
7) Muscle striations show the direction of the pull