muscles

Question 1

Vertebrate Skeletal Muscles Pull on

Answer 1

tendons

 connective tissue, attaches muscles to bones

Question 2

 Muscle contraction

 pulls bone

Answer 2

toward or away from the bone with

which it articulates

Question 3

the skeletal system ______ forces generated by

muscles

Answer 3

mechanical`

Question 4

Hydrostatic Skeleton

Answer 4

Fluid in closed body compartment
 transmits forces generated by contractile cells
or muscle

Question 5

Exoskeletons

________ skeleton and

Answer 5

Nonliving, does not grow

Question 6

Arthropod skeleton

Answer 6

composed partly of chitin
 jointed for flexibility
 adapted for many lifestyles

Question 7

Endoskeletons
Consist of ______ ______
 can grow
 Found in …

Answer 7

living tissue,echinoderms and chordates

Question 8

Axial skeleton

Answer 8

skull
 vertebral column
 rib cage
 sternum

Question 9

Appendicular

skeleton

Answer 9

limbs
 pectoral girdle
 pelvic girdle

Question 10

Skeletal systems, whether they are
hydrostatic skeletons, exoskeletons, or
endoskeletons, \_\_\_\_\_\_\_ and \_\_\_\_\_\_
body and transmit \_\_\_\_\_\_ \_\_\_\_\_\_
important in movement

Answer 10

support and protect mechanical forces

Question 11

joints

Answer 11

Junctions of two or more bones

Question 12

Ligaments

Answer 12

connective tissue bands
 connect bones
 limit movement in join

Question 13

Immovable joints

Answer 13

sutures of the skull

Question 14

Slightly movable joints

Answer 14

joints between vertebrae

Question 15

Freely movable joint

Answer 15

enclosed by joint capsule lined with

membrane that secretes synovial fluid

Question 16

Skeletal muscles act _________ to

one another

Answer 16

antagonistically

Question 17

Agonist

Answer 17

muscle that produces a particular action

Question 18

Antagonist

Answer 18

produces the opposite movement

Question 19

Skeletal muscle (such as biceps)

Answer 19

organ made up of hundreds of muscle fibers

Question 20

Muscle fiber consists of

Answer 20

threadlike myofibrils

 composed of smaller myofilaments (filaments)

Question 21

Striations of skeletal muscle fibers

Answer 21

overlapping actin and myosin filaments

Question 22

Sarcomere

Answer 22

contractile unit of actin (thin) and myosin

(thick) filaments

Question 23

immediate energy source for muscle contraction

Answer 23

Creatine phosphate,ATP Glycogen

Question 24

ATP _______ provides energy to “cock” myosin

Answer 24

hydrolysis

Question 25

Creatine phosphate for muscles

Answer 25

 intermediate energy storage compound

Question 26

Glycogen in muscles

Answer 26

fuel stored in muscle fibers

Question 27

During muscle contraction, energy from ___ is used to _____ muscle _______ so that the muscle shortens

Answer 27

ATP,slide,filaments

Question 28

Contraction of a whole muscle depends on

Answer 28

(1) number of muscle fibers contracting | (2) tension developed by each fiber

Question 29

All skeletal muscle fibers stimulated by a

Answer 29

single motor neuron

Question 30

 Motor recruitment

Answer 30

messages from brain activate motor neurons

Question 31

 The more motor units recruited,

Answer 31

 the stronger the contractions