BIO152 Exam 5 ACTUAL UPDATED
Exam Questions and CORRECT Answers
which type of muscle typically surrounds hollow tubes and organs like the stomach? -
CORRECT ANSWER - smooth muscle
which of the following types of skeletons must be shed typically for an animal to grow? -
CORRECT ANSWER - exoskeleton
vertebrate skeletal muscles are categorized as excitable cells because... - CORRECT
ANSWER - their membranes are excited by moter neurons, can generate and conduct
action potentials
the thick filament is composed almost entirely of ______ molecules - CORRECT
ANSWER - myosin
exoskeletons are used for movement by which of the following animals? - CORRECT
ANSWER - insects and crustaceans
in muscle function at the sarcomere level, the binding of ____ ions to _____ regulates the
formation of cross-bridges. - CORRECT ANSWER - calcium; troponin
the thin filament in skeletal muscles contains ____ muscles. - CORRECT ANSWER -
actin, myosin, troponin, and tropomyosin
what is the role of calcium in skeletal muscle contractions? - CORRECT ANSWER - to
bind with troponin, changing its shape and moving tropomyosin so that binding sites on the actin
filament are exposed
which of the following proteins contains an ATP binding site? - CORRECT ANSWER -
myosin
, which statement about skeletal systems is true? - CORRECT ANSWER - endoskeletons
use tendons to attach skeletal muscles to bone
what is the role of the sacroplasmic reticulum in muscle contraction? - CORRECT
ANSWER - it stores Ca2+ ions for release during contraction
skeletal muscle cells are multinucleate because... - CORRECT ANSWER - the form from
fusion to many embryonic stem cells
smooth muscles and cardiac muscles differ from skeletal muscle because they: - CORRECT
ANSWER - are involuntary
which statement about the endoskeletons of vertebrates is true? - CORRECT ANSWER -
the muscles are attached to an ossified support structure
an apodeme is - CORRECT ANSWER - an internal extension of an exoskeleton
which statement about a myosin filament in skeletal muscles is true? - CORRECT
ANSWER - myosin heads have ATPase activity and interact with actin
release of cross-bridges depends most directly on... - CORRECT ANSWER - adenosine
triphosphate (ATP)
a scientist looking through a microscope at a piece of shoulder muscle would see which of the
following features? - CORRECT ANSWER - striated multinucleate cells with unbranched
fibers
cross-bridges form between ____ and ____ during muscular contraction - CORRECT
ANSWER - actin; myosin
Exam Questions and CORRECT Answers
which type of muscle typically surrounds hollow tubes and organs like the stomach? -
CORRECT ANSWER - smooth muscle
which of the following types of skeletons must be shed typically for an animal to grow? -
CORRECT ANSWER - exoskeleton
vertebrate skeletal muscles are categorized as excitable cells because... - CORRECT
ANSWER - their membranes are excited by moter neurons, can generate and conduct
action potentials
the thick filament is composed almost entirely of ______ molecules - CORRECT
ANSWER - myosin
exoskeletons are used for movement by which of the following animals? - CORRECT
ANSWER - insects and crustaceans
in muscle function at the sarcomere level, the binding of ____ ions to _____ regulates the
formation of cross-bridges. - CORRECT ANSWER - calcium; troponin
the thin filament in skeletal muscles contains ____ muscles. - CORRECT ANSWER -
actin, myosin, troponin, and tropomyosin
what is the role of calcium in skeletal muscle contractions? - CORRECT ANSWER - to
bind with troponin, changing its shape and moving tropomyosin so that binding sites on the actin
filament are exposed
which of the following proteins contains an ATP binding site? - CORRECT ANSWER -
myosin
, which statement about skeletal systems is true? - CORRECT ANSWER - endoskeletons
use tendons to attach skeletal muscles to bone
what is the role of the sacroplasmic reticulum in muscle contraction? - CORRECT
ANSWER - it stores Ca2+ ions for release during contraction
skeletal muscle cells are multinucleate because... - CORRECT ANSWER - the form from
fusion to many embryonic stem cells
smooth muscles and cardiac muscles differ from skeletal muscle because they: - CORRECT
ANSWER - are involuntary
which statement about the endoskeletons of vertebrates is true? - CORRECT ANSWER -
the muscles are attached to an ossified support structure
an apodeme is - CORRECT ANSWER - an internal extension of an exoskeleton
which statement about a myosin filament in skeletal muscles is true? - CORRECT
ANSWER - myosin heads have ATPase activity and interact with actin
release of cross-bridges depends most directly on... - CORRECT ANSWER - adenosine
triphosphate (ATP)
a scientist looking through a microscope at a piece of shoulder muscle would see which of the
following features? - CORRECT ANSWER - striated multinucleate cells with unbranched
fibers
cross-bridges form between ____ and ____ during muscular contraction - CORRECT
ANSWER - actin; myosin
