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Bio 227 Lab 2 Exam Cory Hanley; Questions and Answers 100% Correct $12.99   Add to cart

Exam (elaborations)

Bio 227 Lab 2 Exam Cory Hanley; Questions and Answers 100% Correct

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  • Course
  • Bio 227
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  • Bio 227

Bio 227 Lab 2 Exam Cory Hanley; Questions and Answers 100% Correct Frontalis (frontal belly) Answer-Raises eyebrows Occipitalis (occipital belly) Answer-Pulls scalp posteriorly Orbicularis oculi Answer-Closes eye Corrugator supercilii Answer-Draws eyebrows medially Buccinator Answer-Compress...

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  • August 8, 2024
  • 16
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Bio 227
  • Bio 227
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Bio 227 Lab 2 Exam Cory Hanley; Questions
and Answers 100% Correct
Frontalis (frontal belly) Answer-Raises eyebrows




Occipitalis (occipital belly) Answer-Pulls scalp posteriorly




Orbicularis oculi Answer-Closes eye




Corrugator supercilii Answer-Draws eyebrows medially




Buccinator Answer-Compresses cheeks




Masseter Answer-Elevates mandible




Temporalis Answer-Closes jaw




Pterygoids (medial) Answer-Protract jaw




Pterygoids (lateral) Answer-Protract jaw




Platysma Answer-Tenses neck, depresses mandible

, Bio 227 Lab 2 Exam Cory Hanley; Questions
and Answers 100% Correct
Sternoleidomastoid Answer-Flexes neck, rotates head toward shoulders




Mentalis Answer-Wrinkles chin




Sarcomere Answer-Single unit of contraction, Z-disc to Z-disc




Thin filaments are made of? Answer-Actin




Thick filaments are made of? Answer-Myosin




I-band of sarcomere Answer-Light,




A-band of sarcomere Answer-Dark




H-zone Answer-M-line located in the middle, when muscle contracts this disappears




Myofibrils Answer-Composed of two myofilaments (actin and myosin)




Epimysium Answer-Connective tissue that goes around whole muscle

, Bio 227 Lab 2 Exam Cory Hanley; Questions
and Answers 100% Correct
Fascicle Answer-Groups of individual muscle fibers (cells), wrapped in perimysium




Neuromuscular Junction Answer-The junction between a nerve fiber (specifically an
axon) and a muscle cell.




Synaptic cleft Answer-Space between axon terminal and muscle fiber




Motor Unit Answer-One neuron that branches very extensively contacting many different
muscle fibers




Agonists Answer-Muscle producing the movement




Antagonists Answer-Muscles that oppose movement




Synergists Answer-Muscle that stabilizes movement




Pectoralis major Answer-Flexes, adducts and medially rotates arm




Serratus anterior Answer-Rotates scapula




Deltoid Answer-Abducts arm

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