DAA: Exam II Questions
What muscles arise from the Paraxial mesoderm? - Answer- All skeletal muscle
What muscles arise from the lateral plate mesoderm? - Answer- Cardiac and smooth
When do striations appear in skeletal muscle? - Answer- End of the third month
T or F sensory neurons deve...
DAA: Exam II Questions
What muscles arise from the Paraxial mesoderm? - Answer- All skeletal muscle
What muscles arise from the lateral plate mesoderm? - Answer- Cardiac and smooth
When do striations appear in skeletal muscle? - Answer- End of the third month
T or F sensory neurons develop side by side with muscle. - Answer- True
What are the two divisions of myotome? - Answer- Epaxial, hypaxial
What muscles are epaxial and what innervate them? - Answer- Extensor muscles of
neck and back, dorsal Ramus of spinal cord
What muscles are hypaxial? - Answer- All other skeletal muscle
When do limbs appear? - Answer- Week 7
Where does a congenital diaphragmatic hernia generally occur? - Answer- On the
left
What is wryneck? - Answer- Torticoliis, damage to the sternocleidomastoid
Where do smooth and cardiac muscle generally arise from? - Answer- Splanchnic
mesoderm
What does it mean that muscles are irritable? - Answer- They are excitable or
respond to a stimulus
What is the difference between a tendon and aponeurosis? - Answer- Tendon is
round and a aponeurosis is flat
Why are skeletal muscles called striated? - Answer- Because they appear to have
little bands
Muscles ________ and never _________ - Answer- Pull, push
Give an example of a fusiform muscle. - Answer- Biceps brachii
What neurotransmitter is used at the neuromuscular junction? - Answer-
Acetylcholine
The receptors at the neuromuscular junction are ___________. - Answer- Nicatinic
Define a motor unit. - Answer- Nerve and the muscle it innervates
, What is the difference between origin and insertion? - Answer- Origins are stationary
during motion and insertions move.They can flip flop
All fascias muscles are innervated by __________ except __________ which is
innervated by ________ - Answer- CN II, Levator palpebrea superioris, CN III
T or F the epicranius frontalis pulls the eyebrows medial and down. - Answer- False
What muscle is known as the "Elvis" muscle? - Answer- Levator labii superioris
What muscle closes the eye? - Answer- Orbicularis occuli
What is the action of the zygomaticus muscle? - Answer- Smile
What innervates the muscles of mastication? - Answer- V3, mandibular branch of
trigeminal nerve
What muscles elevate the mandible? - Answer- Temporalis, masseter, medial
pterygoid
What is the formula for innervation of the extrinsic muscles of the eye? - Answer-
SOIV, LRVI, all else III
Innervate on of tongue movement is __________, touch is _________ and taste is
_______________ - Answer- • CN XII
• V3
• VII, IX, & X
What is the OIA of the genioglossus m? - Answer- O: spine of mandible.
I: under tongue.
A: protract and depress
What muscles depress the mandible? - Answer- • Platysma
• Lateral pterygoid
• mylohyoid
• Geniohyoid
• Diagastric
What muscle flexes the neck and extends the head? - Answer- SCM
What lies between the anterior and middle scalenes? - Answer- Brachial plexus &
phrenic nerve
What are the attachments of the omohyoid? - Answer- Superior border of scapula &
hyoid bone
What innervated the diaphragm? - Answer- Phrenic nerve
Contraction of the diaphragm will __________ thoracic column and _______
intrathoracic pressure. - Answer- Increase, decrease
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