Skeletal 1
Skeletal system stores large amounts of _________.
vitamins
antibodies
calcium salts
glycogen
calcium salts
The shaft of a long bone is referred to as the_________.
epiphysis
diaphysis
osteon
sinus
diaphysis
The muscle tissue that can be described as multinucleated, striated, and voluntary is_________.
skeletal striated muscle
smooth muscle tissue
cardiac striated muscle
skeletal striated muscle and cardiac striated muscle
skeletal striated muscle
The plasma membrane, or phospholipid bilayer, of the skeletal muscle fiber is referred to as the_________.
sarcomere
sarcolemma
sarcoplasm
myofibril
sarcolemma
_________ is a movement that decreases the angle between the bones forming the joint.
Flexion
Abduction
Adduction
Extension
Flexion
The interior of an epiphysis is comprised of _________.
compact bone
spongy bone
hyaline cartilage
articular cartilage
spongy bone
The neurotransmitter active in skeletal muscle contraction is_________.
acetylcholine
norepinephrine
epinephrine
serotonin
acetylcholine
Muscle cells can store oxygen using the pigment_________.
hemoglobin
myosin
actin
myoglobin
myoglobin
Except for regions covered by cartilage tissue, the entire surface of a bone is covered by_________.
periosteum
endosteum
fibrocartilage
perichondrium
periosteum
Most skull bones are formed by_________ ossification, but other bones are formed by_________ ossification.
intramembranous; articular cartilage
endochondral; intramembranous
endochondral; epiphysial
intramembranous; endochondral
intramembranous; endochondral
A skeletal muscle contains many fascicles of_________ bound together by_________ connective tissue.
muscle fibers; dense irregular
thick myofilaments; dense irregular
muscle fibers; loose
thin myofilaments; dense irregular
muscle fibers; dense irregular
Which ion is released from the sarcoplasmic reticulum to allow muscle contraction?
Calcium
In the process of endochondral ossification, _________ is(are) replaced by bone.
hyaline cartilage
fibrocartilage
elastic cartilage
connective tissue membranes
hyaline cartilage
A synovial joint is _________.
immovable
calcified
slightly movable
freely movable
freely movable
In general, muscles on the anterior surface of the arm are_________, and muscles on the anterior surface of the leg are_________.
flexors; extensors
flexors; flexors
extensors; flexors
extensors; extensors
flexors; extensors
The functional unit of skeletal muscle is_________.
myosin
sarcolemma
a motor unit
a sarcomere
a sarcomere
Yellow bone marrow is composed of _________.
blood-forming tissue
loose connective tissue
adipose tissue
cartilage tissue
adipose tissue
The pubic symphysis is an example of a _________ joint.
cartilaginous
fibrous
gomphosis
synovial
cartilaginous
An all-or-none response to a threshold stimulus is characteristic of_________.
individual muscle fibers
small muscles
large muscles
None of the choices are correct.
individual muscle fibers
A motor neuron and the muscle fibers it controls constitute a_________, which contains_________ muscle fibers where precise muscle control is required.
motor fascicle; very few
muscle; many
motor unit; very few
motor unit; many
motor unit; very few