DAA: Exam II Questions and Answers
100% Solved | Graded A+
What muscles arise from the Paraxial mesoderm? - ✔✔All skeletal muscle
What muscles arise from the lateral plate mesoderm? - ✔✔Cardiac and
smooth
When do striations appear in skeletal muscle? - ✔✔End of the third month
T or F sensory neurons develop side by side with muscle. - ✔✔True
What are the two divisions of myotome? - ✔✔Epaxial, hypaxial
What muscles are epaxial and what innervate them? - ✔✔Extensor
muscles of neck and back, dorsal Ramus of spinal cord
What muscles are hypaxial? - ✔✔All other skeletal muscle
When do limbs appear? - ✔✔Week 7
Where does a congenital diaphragmatic hernia generally occur? - ✔✔On
the left
What is wryneck? - ✔✔Torticoliis, damage to the sternocleidomastoid
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
,Where do smooth and cardiac muscle generally arise from? -
✔✔Splanchnic mesoderm
What does it mean that muscles are irritable? - ✔✔They are excitable or
respond to a stimulus
What is the difference between a tendon and aponeurosis? - ✔✔Tendon is
round and a aponeurosis is flat
Why are skeletal muscles called striated? - ✔✔Because they appear to
have little bands
Muscles ________ and never _________ - ✔✔Pull, push
Give an example of a fusiform muscle. - ✔✔Biceps brachii
What neurotransmitter is used at the neuromuscular junction? -
✔✔Acetylcholine
The receptors at the neuromuscular junction are ___________. -
✔✔Nicatinic
Define a motor unit. - ✔✔Nerve and the muscle it innervates
What is the difference between origin and insertion? - ✔✔Origins are
stationary during motion and insertions move.They can flip flop
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, All fascias muscles are innervated by __________ except __________
which is innervated by ________ - ✔✔CN II, Levator palpebrea superioris,
CN III
T or F the epicranius frontalis pulls the eyebrows medial and down. -
✔✔False
What muscle is known as the "Elvis" muscle? - ✔✔Levator labii superioris
What muscle closes the eye? - ✔✔Orbicularis occuli
What is the action of the zygomaticus muscle? - ✔✔Smile
What innervates the muscles of mastication? - ✔✔V3, mandibular branch
of trigeminal nerve
What muscles elevate the mandible? - ✔✔Temporalis, masseter, medial
pterygoid
What is the formula for innervation of the extrinsic muscles of the eye? -
✔✔SOIV, LRVI, all else III
Innervate on of tongue movement is __________, touch is _________ and
taste is _______________ - ✔✔• CN XII
• V3
• VII, IX, & X
What is the OIA of the genioglossus m? - ✔✔O: spine of mandible.
3
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
100% Solved | Graded A+
What muscles arise from the Paraxial mesoderm? - ✔✔All skeletal muscle
What muscles arise from the lateral plate mesoderm? - ✔✔Cardiac and
smooth
When do striations appear in skeletal muscle? - ✔✔End of the third month
T or F sensory neurons develop side by side with muscle. - ✔✔True
What are the two divisions of myotome? - ✔✔Epaxial, hypaxial
What muscles are epaxial and what innervate them? - ✔✔Extensor
muscles of neck and back, dorsal Ramus of spinal cord
What muscles are hypaxial? - ✔✔All other skeletal muscle
When do limbs appear? - ✔✔Week 7
Where does a congenital diaphragmatic hernia generally occur? - ✔✔On
the left
What is wryneck? - ✔✔Torticoliis, damage to the sternocleidomastoid
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
,Where do smooth and cardiac muscle generally arise from? -
✔✔Splanchnic mesoderm
What does it mean that muscles are irritable? - ✔✔They are excitable or
respond to a stimulus
What is the difference between a tendon and aponeurosis? - ✔✔Tendon is
round and a aponeurosis is flat
Why are skeletal muscles called striated? - ✔✔Because they appear to
have little bands
Muscles ________ and never _________ - ✔✔Pull, push
Give an example of a fusiform muscle. - ✔✔Biceps brachii
What neurotransmitter is used at the neuromuscular junction? -
✔✔Acetylcholine
The receptors at the neuromuscular junction are ___________. -
✔✔Nicatinic
Define a motor unit. - ✔✔Nerve and the muscle it innervates
What is the difference between origin and insertion? - ✔✔Origins are
stationary during motion and insertions move.They can flip flop
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, All fascias muscles are innervated by __________ except __________
which is innervated by ________ - ✔✔CN II, Levator palpebrea superioris,
CN III
T or F the epicranius frontalis pulls the eyebrows medial and down. -
✔✔False
What muscle is known as the "Elvis" muscle? - ✔✔Levator labii superioris
What muscle closes the eye? - ✔✔Orbicularis occuli
What is the action of the zygomaticus muscle? - ✔✔Smile
What innervates the muscles of mastication? - ✔✔V3, mandibular branch
of trigeminal nerve
What muscles elevate the mandible? - ✔✔Temporalis, masseter, medial
pterygoid
What is the formula for innervation of the extrinsic muscles of the eye? -
✔✔SOIV, LRVI, all else III
Innervate on of tongue movement is __________, touch is _________ and
taste is _______________ - ✔✔• CN XII
• V3
• VII, IX, & X
What is the OIA of the genioglossus m? - ✔✔O: spine of mandible.
3
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
