ch. 3: intro to muscles and directional terminology

Question 1

organization of skeletal muscle tissue from smallest to largest units

Answer 1

myofibril, muscle fibre, fascicle, skeletal muscle

Question 2

myofibril is made up of ___ and ___.

Answer 2

actin and myosin

Question 3

endomysium is the facial sleeve enclosing _____ ____.

Answer 3

muscle fibres

Question 4

epimysium is the fascial sleeve enclosing _____.

Answer 4

skeletal muscle

Question 5

perimysium is the facial sleeve enclosing ____.

Answer 5

fascicle

Question 6

what is a tendon

Answer 6

a fibrous cord attaching muscle to bone

Question 7

skeletal muscles allow for _____ control of muscles.
(besides diaphragm and a few others)

Answer 7

voluntary

Question 8

name 3 functions of muscle

Answer 8

motion, maintain posture, venous flow, thermogenesis

Question 9

what’re the 6 different fibre arrangements of muscles

Answer 9

longitudinal, quadrate, triangular, circular, fusiform, and penniform

Question 10

the sartorius and rectus abdominus have a ____ muscle fibre arrangement

Answer 10

longitudinal

Question 11

name feats. and ex. of a quadrate muscle fibre arrangement

Answer 11

flat, four sided muscle, fibres run parallel to line of pull
ie) rhomboids

Question 12

feats. and ex. of triangular muscle fibre arrangement

Answer 12

flat, fibres radiate from a narrow attachment to a broad one
ie) pec major

Question 13

muscle fibre arrangement that is round, spindle-shaped, and tapered at both ends is _______. Ex?

Answer 13

fusiform
brachialis

Question 14

3 groups penniform fibres are sub divided into

Answer 14

unipenniform, bipenniform, and multipenniform

Question 15

unipenniform muscles fibres originate from where

Answer 15

one side of a tendon

Question 16

bipenniform fibres originate from where

Answer 16

both sides of a tendon

Question 17

where is the origin and insertion of a muscle

Answer 17

origin: proximal attachment
insertion: distal attach.

Question 18

what is a prime mover, a synergist, and an antagonist in reference to muscle groups?

Answer 18

prime mover is the muscle directly responsible for producing desired motion.
synergist assists the prime mover.
antagonist is a muscle that has an action opposite of the prime movers

Question 19

what’re 5 feats. that are used in naming muscles

Answer 19

location, size, direction, shape, action, number of origins, origin and insertion