Which prenatal structure forms the ascending aorta and pulmonary trunk?
A. Truncus arteriosus
B. Primitive ventricle
C. Primitive atrium
D. Sinus venosus
E. Conus cordis
Answer: A
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The directional term that means "in back of or toward the back surface" is
A. caudal. B. posterior. C. anterior. D. cephalic. E. proximal.
Mutagens are factors that cause mutation
Indicate whether the statement is true or false
An extended period of time between the P wave and the QRS complex may indicate which of the following?
A. Ventricular contraction is faster than usual. B. Ventricular contraction is taking longer than usual. C. The signal is taking too long to get to the AV node. D. The signal is traveling too quickly to the AV node. E. The atria are not contracting.
The brainstem is composed of what four parts?
A. Medulla oblongata, pons, midbrain, reticular formation B. Cerebrum, diencephalon, brainstem, cerebellum C. Frontal, parietal, temporal, occipital D. Neither of these answers is correct