Which of the following is NOT true of the masseter muscle?
A. It inserts on the lateral portion of the mandible.
B. It is innervated by the facial nerve.
C. It closes the jaw by elevating the mandible.
D. It originates on the zygomatic arch.
E. All of these are true of the masseter muscle.
Answer: B
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Which of the following is not occurring at the same time when the QRS complex appears on an ECG?
a. depolarization of Purkinje fibers b. depolarization of the ventricles c. repolarization of the atria d. depolarization of internodal pathways e. All of the above are occurring at the same time
The left ventricle pumps blood to the
A) lungs. B) right ventricle. C) right atrium. D) aorta. E) pulmonary circuit.
The deletion of a single base in a gene would alter the structure of the gene's protein more than the substitution of one base for another
Indicate whether the statement is true or false.
On day 1 of the menstrual cycle, FSH levels will be ________. The follicle that will become dominant is in the ________ stage of maturation. Progesterone levels in blood are ________.
A. rising; preantral to antral; low B. rising; primordial; low C. rising; preantral to antral; high D. falling; expanding; low E. falling; atretic; high