BIOD 151 Module 5 Exam: Requires Respondus
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Answers|2025 Update|100% Correct
Why do the muscular and skeletal systems work together?
To provide movement for the human body
What are the 3 types of muscle tissue?
Skeletal, smooth and cardiac
Characteristics of skeletal muscles
1. Must have blood and nervous supply to provide movement
2. Are under conscious control
Conscious control
a person can consciously decide to use these muscles to
complete an action
How does communication throughout the body tell a muscle to
move?
Peripheral nerves carry the signal from the central nervous
system (brain and spinal chord) to a specific muscle destination
Motor actions
Messages from the central nervous system to a muscle
Sensation or sensory input
When nerves carry information from the external environment
to the central nervous system
Tendons
,Connective tissues that connect skeletal muscle to bone
Characteristics of tendons
flexible, can bend at the joints and help cushion against sudden
movement
Ligaments
Connective tissue that connects bone to bone helping to stabilize
joints
What are the 3 components of a skeletal muscle?
Origin, insertion and action
Origin
The bony site of attachment that is stationary during movement
Insertion
The bony site of attachment that is moved by the muscle
contraction
Action
The effect that is produced by the muscle contraction
Innervation
The peripheral nerve that supplies a muscle with a message from
the brain
How many pairs of cranial nerves originate on the ventral
surface of the brain?
12
Orbicularis oculi
Action: eye closure, Innervation: facial nerve (CN VII)
, Orbicular oris
Action: Mouth closure- closes lips, protrudes lips forward,
presses lips against teeth Innervation: facial nerve (CN VII)
Zygomaticus major/minor
Action: pull corners of lips upward, Innervation: facial nerve (CN
VII)
Risorius
Action: pulls the corners of the mouth posteriorly (grin or
grimace), Innervation: Facial nerve (CN VII)
Frontalis (occipitofrontailis)
Action: Raise eyebrows, Innervation: facial nerve (CN VII)
Buccinator
Action: compress cheeks, Innervation: facial nerve (CN VII)
Masseter
Action: Jaw closure, Innervation: trigeminal nerve (CN V,
mandibular branch)
Temporalis
Action: Elevates mandible, closes jaw, Innervation: trigeminal
nerve (CN V, mandibular branch)
Agonist
The muscle that contract as the primary movement in a pair
Antagonist
The muscle that moves secondarily to relax the contracted
muscle
Lockdown Browser | Actual Questions and
Answers|2025 Update|100% Correct
Why do the muscular and skeletal systems work together?
To provide movement for the human body
What are the 3 types of muscle tissue?
Skeletal, smooth and cardiac
Characteristics of skeletal muscles
1. Must have blood and nervous supply to provide movement
2. Are under conscious control
Conscious control
a person can consciously decide to use these muscles to
complete an action
How does communication throughout the body tell a muscle to
move?
Peripheral nerves carry the signal from the central nervous
system (brain and spinal chord) to a specific muscle destination
Motor actions
Messages from the central nervous system to a muscle
Sensation or sensory input
When nerves carry information from the external environment
to the central nervous system
Tendons
,Connective tissues that connect skeletal muscle to bone
Characteristics of tendons
flexible, can bend at the joints and help cushion against sudden
movement
Ligaments
Connective tissue that connects bone to bone helping to stabilize
joints
What are the 3 components of a skeletal muscle?
Origin, insertion and action
Origin
The bony site of attachment that is stationary during movement
Insertion
The bony site of attachment that is moved by the muscle
contraction
Action
The effect that is produced by the muscle contraction
Innervation
The peripheral nerve that supplies a muscle with a message from
the brain
How many pairs of cranial nerves originate on the ventral
surface of the brain?
12
Orbicularis oculi
Action: eye closure, Innervation: facial nerve (CN VII)
, Orbicular oris
Action: Mouth closure- closes lips, protrudes lips forward,
presses lips against teeth Innervation: facial nerve (CN VII)
Zygomaticus major/minor
Action: pull corners of lips upward, Innervation: facial nerve (CN
VII)
Risorius
Action: pulls the corners of the mouth posteriorly (grin or
grimace), Innervation: Facial nerve (CN VII)
Frontalis (occipitofrontailis)
Action: Raise eyebrows, Innervation: facial nerve (CN VII)
Buccinator
Action: compress cheeks, Innervation: facial nerve (CN VII)
Masseter
Action: Jaw closure, Innervation: trigeminal nerve (CN V,
mandibular branch)
Temporalis
Action: Elevates mandible, closes jaw, Innervation: trigeminal
nerve (CN V, mandibular branch)
Agonist
The muscle that contract as the primary movement in a pair
Antagonist
The muscle that moves secondarily to relax the contracted
muscle
