NC 39 and 40 Quiz

What kind of muscle cell is shown

Skeletal muscle

what kind of muscle cell is shown

cardiac muscle

what kind of muscle cell is shown

smooth muscle

Functions of skeletal muscle

-Provide skeletal movement

-maintain posture & body position

-support soft tissues

-guard body exits & entrances

-maintain body temperature

-provide nutrient reserves

basic info of cardiac muscle

-found in heart

-when it contracts, blood is pumped through blood vessels

basic info of smooth muscle tissue

-involuntary

-lines walls of hollow organs

-lining in small arteries: regulates vessel diameter

-digestive tract: moves fluids and solids

basic info of skeletal muscle

-voluntary

-move body by pulling on bones

-makes it possible for us to walk and move

produce skeletal movement

contraction pull on tendons and move the bones

maintain posture and body position

tension in muscles stabilizes joints to help maintain body posture

support soft tissues

abdominal wall and the floor of the pelvic cavity have muscles that support the weight of visceral organs and shield internal tissues from injury

guard body entrances and exits

encircle the openings of digestive and urinary tract; provide voluntary control over swallowing, defecation, and urination

maintain body temperature

contractions= energy and energy= heat; this heat released keeps body temperature in normal range

provide nutrient reserves

contractal protiens from muscles are broken down into amino acids which are released into circulation

skeletal muscle structure

skeletal muscle

muscle fascicle

muscle fibers (cell)

tendon

bundle of connective tissue layers

aponeurosis

broad sheet of connective tissue layers

epimysium

dense layer of collagen fibers-surrounds entire muscle

perimysium

fibrous layer that divides the skeletal muscle into a series of compartmets; contains blood vessles and nerves

endomysium

thin layer of areolar connective tissue that surrounds each muscle fiber

skeletal muscle

complex organ containting skeletal muscle fibers, connective tissues that contract, blood vessels that nourish muscle fibers, & nerves that control contraction

muscle fascicle

bundle of muscle fibers

muscle fiber

contans endomysium, appillaries, myosatellite cells, axons of neurons that control muscle fibers

myosatellite cell

stem cells that function in repair of damaged muscle tissue

m

myoblast

groups of embryonic cells fuse forming multinucleate cells ca

sarcolemma

plasma membrance of a muscle cell

sarcoplasm

cytoplasm of a muscle cell