Human Muscular System

Question 1

force exerted on muscle by an object

Answer 1

muscle load

Question 2

force a contracting muscle exerts on an object

Answer 2

muscle tension

Question 3

To lift a load

Answer 3

muscle tension must exceed muscle load

Question 4

two primary types of muscle contractions

Answer 4

isotonic & isometric

Question 5

muscle shortens while the load is

constant

Answer 5

isotonic contraction

Question 6

muscle develops tension but does not

shorten

Answer 6

isometric contraction

Question 7

Pushing against an immovable wall

Answer 7

isometric

Question 8

lifting a dumbbell with your biceps

Answer 8

isotonic

Question 9

isometric contraction

Answer 9

muscle develops tension

does not shorten

Question 10

isotonic contraction

Answer 10

muscle shortens

while the load is constant

Question 11

state of moderate to slight tension that is maintained

continuously by a muscle or muscle group like posture

Answer 11

muscle tone

Question 12

muscle tone

Answer 12

state of moderate to slight tension that is maintained

continuously by a muscle or muscle group

Question 13

can muscle lengthen

Answer 13

no. only contract (shorten)

Question 14

movement results from

Answer 14

contraction of a skeletal muscle that connects a nonmoving bone
(origin) to a moving bone (insertion) across a joint

Question 15

most joints are

Answer 15

movable synovial

Question 16

extension of a joints

Answer 16

increases the angle between the two bones

Question 17

Flexing a joint

Answer 17

decreases the angle between the two bones

Question 18

The contraction of the biceps muscle _______ the forearm,

whereas the contraction of the triceps _________ the forearm. these are ________ pairs of muscles

Answer 18

flexes
extends
antagonistic

Question 19

—muscle that bends a joint

Answer 19

flexor

Question 20

muscle that straightens a joint

Answer 20

extensor

Question 21

where a muscle attaches to a relatively fixed

position

Answer 21

origin

Question 22

where a muscle attaches at its more

movable end

Answer 22

insertion

Question 23

chief flexor of the forearm

Answer 23

biceps

Question 24

extensor muscle of the elbow joint

Answer 24

triceps

Question 25

Muscles of the Head and Neck

Answer 25

* Muscles of facial expression * Muscles of mastication * Muscles that move the head (neck muscles)

Question 26

Muscles of facial expression

Answer 26

``` frontalis occipitalis orbicularis oculi orbicularis oris zygomaticus major platysma ```

Question 27

Muscles of mastication

Answer 27

temporalis | masseter

Question 28

Muscles that move the head

Answer 28

Strenocleidomastoid | trapezius

Question 29

Muscles of the trunk

Answer 29

• Muscles that move the arm at the shoulder joint • Muscles that move the scapula • Muscles that move the abdominal wall and vertebral column

Question 30

Muscles that move the arm at the | shoulder joint

Answer 30

``` pectoralis major (anterior) deltoid (anterior and posterior) latissimus dorsi (posterior) ```

Question 31

muscles that move the scapula

Answer 31

``` trapezeius (posterior) serratus anterior (anterior) ```

Question 32

Muscles that move the abdominal wall | and vertebral column

Answer 32

``` Anterior: -deep muscles: #Transverse abdominis #internal oblique -seperficial muscles: #rectus abdominis #internal oblique Posterior: #errector spinae ```

Question 33

what moves the vertebral column

Answer 33

spinal errectors

Question 34

_______contraction of these muscles extends the spine, while ____ contraction causes lateral flexion

Answer 34

bilateral, unilateral

Question 35

also help to maintain posture by steadying the spine on the pelvis

Answer 35

spinal erectors

Question 36

Muscles of the arm and forearm

Answer 36

biceps brachii triceps brachii brachialis

Question 37

a muscle of the forearm that flexes the forearm at the elbow. Exercises like hammer curls and reverse curls work it

Answer 37

brachioradialis

Question 38

a group of muscles located at the posterior side of the forearm responsible for extension of the wrist and fingers, & supination of the forearm

Answer 38

flexors

Question 39

a group of muscles located on the anterior side of the forearm, included in supination and flexion of the forearm

Answer 39

extensors

Question 40

Muscles of the thigh

Answer 40

``` anterior: -adductor group -quadriceps femuris group -sartorius posterior: -hamstring group -gluteus maximus ```

Question 41

It serves to attach the gastrocnemius and soleus | muscles to the calcaneus (heel) bone

Answer 41

calcaneal tendon

Question 42

Hip and knee flexor

Answer 42

sarorius

Question 43

Extend the leg at the knee joint and to flex the | thigh at the hip joint

Answer 43

quadricep femuris group

Question 44

Extend the leg at the knee joint and to flex the | thigh at the hip joint

Answer 44

adductor group

Question 45

Act on the hip joint: extension, external rotation, abduction and adduction of the thigh

Answer 45

Gluteus Maximus

Question 46

Flexion at the knee, extends of the thigh at the | hip, and lateral rotation at the hip and knee

Answer 46

Hamstring Group

Question 47

Strongest dorsiflexor of the foot

Answer 47

ribialis anterior

Question 48

Flexion of foot at the knee

Answer 48

Gastrocnemius Muscle

Question 49

Helps moving the ankle, flexing the foot, and | maintaining balance

Answer 49

Peroneus Longus

Question 50

Extension of the four medial toes in their metatarsophalangeal and both interphalangeal joints

Answer 50

Extensor Digitorum Longus

Question 51

Flexion of the foot

Answer 51

soleus muscle