Ch 9 Lec 3 - Muscles

Question 1

type of lever that is a see-saw with resistance opposite of effort with a central fulcrum

Answer 1

first class

Question 2

example of first class lever

Answer 2

neck extension

Question 3

the effort in neck extension

Answer 3

neckextensors

Question 4

fulcrum of neck extension

Answer 4

atlanto-occipital joint

Question 5

resistance in neck extension

Answer 5

skull

Question 6

type of lever that is a wheel barrow and the effort is opposite of fulcrum to move the resistance

Answer 6

second class

Question 7

example of second class lever

Answer 7

plantar flexion

Question 8

effort of plantar flexion

Answer 8

calf

Question 9

fulcrum of plantar flexion

Answer 9

MP joint

Question 10

resistance of plantar flexion

Answer 10

weight of body

Question 11

type of lever that is a hockey wrist shot where the effort is in between fulcrum and resistance

Answer 11

third class

Question 12

example of a third class lever

Answer 12

elbow flexion

Question 13

effort of elbow flexion

Answer 13

biceps brachii

Question 14

fulcrum of elbow flexion

Answer 14

elbow joint

Question 15

resistance of elbow flexion

Answer 15

weight distal to joint

Question 16

skeletal muscle fiber that has high energy requirements, are anaerobic, have large diamater, and densely packed myofibrils

Answer 16

fast fibers

Question 17

fast fibers have blank mitochondria

Answer 17

few

Question 18

fast fibers have rapid, powerful brief blank

Answer 18

contractions

Question 19

skeletal muscle fibers with more myoglobin, aerobic, and smaller diameter

Answer 19

slow fibers

Question 20

slow fibers take blank to contract

Answer 20

longer

Question 21

slow muscles are blank in color

Answer 21

red

Question 22

fast fibers are blank in color

Answer 22

white

Question 23

skeletal muscle fibers that are slow and fast and have greater resistance to fatigue

Answer 23

intermediate fibers

Question 24

blank can change one muscle type to another

Answer 24

exercise

Question 25

this muscle type is attached to hair follicles in skin

Answer 25

smooth

Question 26

three smooth muscle characteristics

Answer 26

in walls of organs and blood vessels, nonstriated, involuntary, elastic, spindle shaped, slow contractions

Question 27

two things that stimulate smooth muscles

Answer 27

nervous system, hormones, ions, stretching

Question 28

many gap junctions, sheets of spindle-shaped cells, and contract together in this type of smooth muscle

Answer 28

single unit

Question 29

example of single unit smooth muscle

Answer 29

blood vessels, digestive tract, urinary tract, respiratory tract

Question 30

type of smooth muscle that has no or few gap junctions, separate fibers, only contract when stimulated by motor nerve

Answer 30

multi unit

Question 31

example of multi unit smooth muscle

Answer 31

large blood vessels, uterus, iris of ey

Question 32

muscle type that is striated, involuntary and autorhythmic

Answer 32

cardiac muscle

Question 33

cardiac muscle is made of a network of fibers with blank at ends and is found only in blank

Answer 33

intercalated disks, heart