You witness your friend Greg in a fist-fight. He is hit in the jaw and when you look at him, his face appears misaligned. You drive him to the emergency department and are not surprised to learn that he has a broken
A) temporal bone.
B) zygomatic bone.
C) mandible.
D) external auditory meatus.
E) clavicle.
Answer: C
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The SA node relays nerve impulses into the AV bundle of the interventricular septum,
and the AV node is responsible for the rhythmic contractions of the heart. Indicate whether the statement is true or false
Which of the following occurs during repolarization?
A) Voltage-gated potassium channels open, potassium flows into the cell and some voltage-gated sodium channels inactivate. B) Voltage-gated potassium channels open. C) Potassium flows into the cell. D) Some voltage-gated sodium channels inactivate. E) Voltage-gated potassium channels open and potassium flows into the cell.
Hormones are chemical messengers produced by the ________ system that helps in maintaining homeostasis
A) nervous B) endocrine C) urinary D) cardiovascular
A(n) ________ is a rigid structure that moves on a fixed point
A) action B) insertion C) origin D) fulcrum E) lever