science muscles for 7th grade(mpcs)

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this is a study quiz on some of the muscles in your body and other questions about muscles.

abdominals

support the abdominal wall

biceps brachii

flexes forearm at elbow

biceps femoris

flexes leg at the knee

deltoid

a thick,triagular muscle covering the shoulder joint, raise arm from the side

gastronemius

the largest, most prominent muscle of the calf of the leg, point toe

gluteus maximus

extends hip for standing up

latissimus dorsi

adducts humerus-run from vertebrae to humerus

masseter

muscle in cheek that closes the lower jaw when chewing

pectoralis major

adducts humerus-moves shoulder, deep breathing

quadraceps femoris

extends and rotates femur; straightens the leg

sartorius

flexes hip and knee; bends leg-longest muscle in human body

tibialis anterior

flexes foot for walking

trapezius

elevate scapula; lifts shoulder

triceps brachii

extends forearm at elbow; straightens the arm

movement

What is the muscular system responsible for?

over 600

how many muscles are there in the human body

ATP

where do muscles get there energy from?

tendon

attached to bones by tough connective tissue

voluntary muscles

muscles you control

involuntary muscles

muscles you can't control constantly

muscle fibers

what muscle cells are called

name 3 types of muscles

skeletal,cardiac, and smooth

arms and legs

where are skeletal muscles located?

stomach and blood vessels

where are smooth muscles located?

heart

where are cardiac muscles located?

voluntary

Are skeletal muscles vol. or invol.?

striated

Are skeletal muscles striated or not?

what kind of bands do the types of muscles have?

skeletal-striped-like bands, smooth-no bands, cardiac-band-like apperance

True

T or F? muscles always pull but never push.

What does a muscle do when it shortens?

contracts

relaxation

when a muscle returns to it regular shape

true

T or F?muscles always work in pairs.

all or none rule

the fiber either contracts as hard as it can or it dosen't contract

the strength of the contraction is determined by what?

the number of muscle fibers that contract

heart beats

the repeated contraction of cardiac muscle

when do muscle contract or become shorter and thicker?

when you stretch

eliminates waste,covers & protects the body from injury,regulates body temp.,gathers info from the env.,produces vitamin D

what are 5 functions of the skin?

why are pain messages important?

because they warn you if your injured

vitamin D

skin cells produce this in the presence of sunlight

muscular system

enables movement of the body & internal organs

what structures do the dermis contain?

hair follice & sweat glands

how can you keep you skin healthy

healthful diet,keep it clean and dry,limit exposure to the sun

epidermis

the outer most layer of the skin

dermis

inner most layer of the skin

melanin

pigment that gives skin its color,protects skin from burning in the sunlight

what are 3 structures in the dermis?

hairs, sweat glands, and oil glands

pores

perspiration reaches the surface of the skin through these openings

how does the skeletal muscle help my body move?

pulls and contracts

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