DAA: Exam II Questions 2024/2025 questions and answers | verified
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
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
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.
I: under tongue.
A: protract and depress
What muscles depress the mandible? - • Platysma
• Lateral pterygoid
• mylohyoid
• Geniohyoid
• Diagastric
What muscle flexes the neck and extends the head? - SCM
What lies between the anterior and middle scalenes? - Brachial plexus & phrenic nerve
What are the attachments of the omohyoid? - Superior border of scapula & hyoid bone
What innervated the diaphragm? - Phrenic nerve
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
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
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.
I: under tongue.
A: protract and depress
What muscles depress the mandible? - • Platysma
• Lateral pterygoid
• mylohyoid
• Geniohyoid
• Diagastric
What muscle flexes the neck and extends the head? - SCM
What lies between the anterior and middle scalenes? - Brachial plexus & phrenic nerve
What are the attachments of the omohyoid? - Superior border of scapula & hyoid bone
What innervated the diaphragm? - Phrenic nerve
