Skeletal muscle fibers are formed from embryonic cells called
A) sarcomeres.
B) myofibrils.
C) myoblasts.
D) fascicles.
E) myomeres.
Answer: C
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Which of the following structures passes through the opening labeled 2 in the diagram?
a) internal carotid artery b) mental nerve c) cranial nerve XI (accessory) d) branch of the occipital artery e) cranial nerve VII (facial)
What type of hormones enter their target cells, bind with a receptor protein, penetrate the nucleus, and influence the transcription of genes?
A) steroid hormones B) peptide hormones C) both of the above D) none of the above
As the distance between a damaged axon and its receptor organ increases, the possibility of repair increases
Indicate whether this statement is true or false.
Tachycardia is a term that refers to
A) Lower than normal heart rate. B) Abnormal rhythm. C) Uncoordinated contraction of the heart. D) Higher than normal heart rate.