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Bio 152 Exam 2
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Bio 152 Exam 2 Bio 152 Exam 2 Bio 152 Exam 2
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Bio 152 Exam 2When animals die, muscles stiffen in rigor mortis because - verified answer actin and myosin
cannot separate without ATP.
The primary reservoir for calcium that is released during excitation-contraction coupling in a skeletal
muscle fiber is - verified answer sarcoplasmic reticulum.
Which statement about skeletal systems is true? - verified answer Bones in an endoskeleton are
constantly undergoing change and remodeling in response to forces placed on them.
Fast-twitch skeletal muscle fibers, called white muscle cells, are characterized by - verified
answer the rapid development of high tension.
The thick filament is composed almost entirely of _____ molecules. - verified answer myosin
A scientist looking through a microscope at a piece of shoulder muscle would see which of the
following features? - verified answer striated with unbranched fibers
"_______" is the term used for the state of the adductor muscles of a scallop as it maintains a
contraction for an extended period of time. - verified answer Catch
Which of the following types of skeletons must be shed typically for an animal to grow? - verified
answer exoskeleton
The thin filament in skeletal muscle contains _____ molecules. - verified answer All of the
choices are correct except for myosin
Which of the following proteins contains an ATP binding site? - verified answer myosin
The primary reservoir for calcium that is released during excitation-contraction coupling in a skeletal
muscle fiber is - verified answer sarcoplasmic reticulum.
, Skeletal muscles are - verified answer striated, voluntary, and have unbranched fibers.
What is the role of the sarcoplasmic reticulum in muscle contraction? - verified answer It stores
Ca2+ ions for release during contraction.
Vertebrate skeletal muscles are categorized as excitable cells because - verified answer their
membranes generate and conduct action potentials.
An apodeme is - verified answer an internal extension of an exoskeleton.
Exoskeletons are used for movement by which of the following animals? - verified answer
insects and crustaceans
Cross-bridges form between _____ and _____ during muscular contraction. - verified answer
actin, myosin
In which organism are you likely to find myelinated axons? - verified answer Dolphin
Outside the CNS, groups of neuronal cell bodies that are clustered together to perform basic
functions are termed - verified answer ganglia
In a thin section through brain tissue, you see concentric layers of a cell's membrane wrapped
around the axon of a neuron. This cell wrapped around the axon most likely - verified answer
insulates the axon for rapid conduction of action potentials.
A neuron innervating your bicep muscle would be considered part of the - verified answer
peripheral nervous system.
You've just had a near miss in your car. Your pulse is racing and you notice your pupils are wide open
when you look in your rearview mirror. What part of your autonomic nervous system is activated? -
verified answer sympathetic
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