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BIO 251 Final Exam: Questions & Answers (Pass!)
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BIO 251 Final Exam: Questions & Answers (Pass!)
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BIO 251 Final Exam: Questions & Answers (Pass!)The___ runs deep to the internal oblique Right Ans - transverse abdominis
A nursing infant develops a powerful sucking muscle that inserts to the
muscle which adults also use for whistling (orbicularis oris). What is this
muscle called? Right Ans - buccinator
----is a powerful forearm extensor at the elbow joint Right Ans - triceps
brachii
the type of contraction where the tension is less than the load is called
Right Ans - isotonic eccentric contraction
the action potential is conducted into a skeletal muscle fiber by Right Ans -
transverse tubules
what type of muscle assists an agonist by causing a like movement or by
stabilizing a joint veer which an agonist acts? Right Ans - synergist
in an and isotonic contraction, the muscle____ Right Ans - changes in length
and moves the "load"
at rest, the tropomyosin molecule is held in place by Right Ans - troponin
molecules
which of the following statement is true Right Ans - Striated muscle cells
are long and cylindrical with many nuclei
A single motor neuron together with all the muscle fibers it innervates is
called Right Ans - motor unit
the delicate connective tissue that surrounds the skeletal muscle fibers and
ties adjacent muscle fibers together is the Right Ans - endomysium
the quadriceps femurs is composed of three "vests" muscles and the ___
Right Ans - rectus femoris
,A weight-lifter strains to lift a heavy weight and there is no movement of the
person's arms holding on to the weight. This type of contraction is called a(n)
________ contraction. Right Ans - isometric
which of the following muscles is used to form a smile Right Ans -
zygomaticus major
which of the following muscles is involved in producing horizontal wrinkles in
the forehead Right Ans - the frontal belly of the epicranius
During muscle contraction, myosin cross bridges attach to which active sites?
Right Ans - actin filaments
at the grocery store a cute, little curly-haired child is standing behind you in
line. You turn around for a moment and she sticks her tongue out at you.
Which lounge muscle did she use? Right Ans - genioglossus
which of the following surrounds and individual muscle cell? Right Ans -
endomyosin
what is the function role of T-tubles Right Ans - enhance cellular
communication during muscle contraction
which of the following is a recognized function of skeletal muscle Right Ans
- all of these answers are correct
which of the following is NOT a membrane of the hamstrings Right Ans -
gracilis
which of the following muscles is involved in crossing one leg over the other
to produce the cross- legged position? Right Ans - the sartorius
which of the following best describes the orbicularis oris? Right Ans - it
closes, purses, and protrudes the lip
which of the following muscles is NOT a rotator cuff muscle? Right Ans -
Levator scapulae
, the type of contraction where the tension exceeds the load is called Right
Ans - isotonic concentric contraction
the sternocleidomastoid muscle inserts on the___ Right Ans - mastoid
process of temporal bone
Immediately following the arrival of the stimulus at a skeletal muscle cell
there is a short period called the ________ period during which the
neurotransmitter is released by exocytosis, diffuses across the synaptic cleft,
and binds to its receptors. Right Ans - latent
Which muscle group is involved when a "pulled groin" occurs? Right Ans -
thigh adductors
what is a muscle that provides the major forces for producing a specific
movement called? Right Ans - an agonist (prime mover)
the plasma membrane of a skeletal muscle fiber is called the Right Ans -
sarcolemma
the type of contraction in which the muscle fibers do not shorten is called
Right Ans - isometric
What is the role of tropomyosin in skeletal muscles? Right Ans -
tropomyosin serves as a contraction inhibitor by blocking the myosin binding
sites on the actin molecules
a muscle that opposes, or reverses, a particular movement is AN Right Ans
- antagonist
You try to pick up an object and discover that it is much heavier than you
expected. Which process must occur in the muscle to increase tension so you
can pick up the object? Right Ans - recruitment
which of the following best describes the term sarcoplasmic reticulum
Right Ans - storage and release site for calcium ions
The bundle of collagen fibers at the end of a skeletal muscle that attaches the
muscle to bone is called a(n) Right Ans - tendon
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