1) Match the type of muscle tissue with its brief description. Unstriated, singl
ID: 3507334 • Letter: 1
Question
1) Match the type of muscle tissue with its brief description.
Unstriated, single nucleus
Striated, autorhythmic
Striated, multiple nuclei
Match each of the options above to the items below.
Skeletal
Cardiac
Smooth
2) The brachialis muscle is the prime mover of elbow flexion, while biceps brachii assists. In other words, during elbow flexion brachialis is the ______ and biceps brachii serves as the ________.
agonist; synergist
agonist; antagonist
synergist; antagonist
fixator; agonist
3) A motor neuron transmits the effect of a nerve impulse to the muscle fiber at a ________ _________.
4) True or False
In the limbs, the distal attachment of a muscle is typically the less moveable point of attachment.
5) Which of the following gives rise to skeletal muscles during development?
Myotome
Sclerotome
Dermatome
6) Your school wins the homecoming football game against its biggest rival. You watch as the smallest cheerleader tries to lift up the heaviest linebacker in her excitement. As she strains against his 300 lb. load and does not move him, what type of muscle contraction are her muscles experiencing?
Isotonic
Isometric
No contraction because she does not move him
7) The type of muscle fibers that are used to maintain posture in the back muscles are primarily
intermediate fibers.
anaerobic fibers.
slow fibers.
fast aerobic fibers.
8) In the gluteus maximus, each motor unit controls a(n) _____________ amount of muscle fibers than a motor unit in the eye muscles.
lesser
greater
equal
Explanation / Answer
1)
Muscle is the tissue composed of cells that are specialized to shorten in length by contraction.
There are mainly three types of muscles. It's having vary characteristics as below:-
Skeletal muscles- striated, multinuclear and voluntary muscles
Cardiac muscles- auto rhythmic, striated, single nucleus and involuntary muscles.
Smooth muscle:- Unstriated, single nuclues, and involuntary muscles.
2)
Agonist and synergist.
Agonist is the prime mover muscle which directly applies force to contraction where as synergist is the supporting muscle for prime mover.
3)Neuromuscular junction.
Impulse is the electrical activity which is having information from the CNS. it transmits with the help of neurotransmitter. Release if neurotransmitter icuurs at neuromuscular junction. Also called as synapse.
4)
FALSE.
Because the muscles of limb's distal attachments is typically more or greater moveable.
5)
Myotome - Yields skeletal muscle
Where as sclerotome develops bones and dermotome develops skin.
6)
Isometric.
Because there is no joint movement as just she tried to lift the heavy load. So her muscles length could not change but tension will be changed.
7)Slow fibers
8) Greater.
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