skeletal, smooth, cardiac correct answers 3 types of muscles
skeletal muscle correct answers "organ" of the muscular system composed of skeletal muscle tissues, nervous tissue, blood, and connective tissues
fascia correct answers layers of fibrous connective tissue that separates an individua...
A&P - Muscular System || WITH ACTUAL
SOLUTIONS!!!
skeletal, smooth, cardiac correct answers 3 types of muscles
skeletal muscle correct answers "organ" of the muscular system composed of skeletal muscle
tissues, nervous tissue, blood, and connective tissues
fascia correct answers layers of fibrous connective tissue that separates an individual skeletal
muscle from adjacent muscles and holds it into position
connective tissue correct answers tissue that forms broad fibrous sheets called aponeuroses
which may attach to the coverings of adjacent muscles
skeletal muscle fiber correct answers a single cell that contracts in response to stimulation
and then relaxes when the stimulation ends
myofibrils correct answers contractive fibers within muscle cells
actin and myosin correct answers proteins that work together to contract and relax muscle
fibers
sarcomere correct answers structural and funtional unit of a myofibril
sarcoplasmic reticulum correct answers membranous network of channels and tubules within
a muscle fiber that correspond to the endoplasmic reticulum
transverse tubules correct answers membranous channels that extend inward from a muscle
fiber membrane and passes through the fiber
motor neuron correct answers neuron that transmits impulses from the central nervous system
neuromuscular junction correct answers point of communication between a nerve cell and
muscle cell
motor end plate correct answers specialized portion of a muscle fiber membrane at a
neuromuscular juntion
neurotransmitters correct answers chemicals that axon ends secrete to control another neuron
or an effector
motor neuron and muscle fiber correct answers together these two constitute a motor unit
myosin molecule correct answers composed of 2 twisted protein strands with golbular parts
called cross-bridges that project outward alond their lengths
actin molecule correct answers composed of a globular structure with a binding site to which
the myosin cross-bridges can attach
, actin correct answers forms a double helix with the proteins troponin and tropomyosin
sliding filament theory correct answers states that the head of a myosin cross-bridge can
attach to an actin-binding site and bend slightly, pulling the actin filament with it
ATPase correct answers enzyme that causes ATP molecules to release the energy stored in
their terminal phosphate bonds
skeletal muscle fiber correct answers normally does not contract until a neurotransmitter
stimulates it
acetylcholine correct answers a type of neurotransmitter which is a biochemical secreted at
axon ends of many neurons; transmits nerve messages across synapses
muscle impulse correct answers impulse that travels along sarcolemma and down transverse
tubules
acetylcholinesterase correct answers enzymes that catalyze the breakdown of acetylcholine
ATP molecule correct answers supplies the energy for muscle fiber contractions; a muscle
fiber only has enough of this to contract for a very short period of time; so when a fiber is
active this must be generated
creatine molecule correct answers muscle biochemical that stores energy
ATP decomposes correct answers energy from creatine phosphate can be transferred to ADP
molecules and converted back into ATP when...?
hemoglobin correct answers pigment of red blood cells that transports oxygen
myoglobin correct answers pigmented compound in muscle tissue that stores oxygen
oxygen debt correct answers amount of oxygen required after physical activity
fatigue correct answers when a muscle loses its ability to contract after prolonged periods of
strenuous excercise
cramp correct answers painful conditon in which a muscle undergoes a sustained involuntary
contraction
fatigued and cramped correct answers a muscle becomes these two things at the same time
less than half correct answers how much of the energy released in cellular respiration is
available for use in metabolic processes before the rest becomes heat
threshold stimulus correct answers stimulation level that must be exceeded to elicit nerve
impulses or muscle contractions
all-or-none response correct answers when a muscle fiber or neuron responds completely
when exposed to a threshold stimulus
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