The chamber within a tooth that contains blood vessels and nerves is the
A) enamel.
B) cement.
C) dentin.
D) pulp cavity.
E) periodontium.
Answer: D
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An antigen is a protein on cell surfaces that can stimulate the immune system to produce antibodies to fight foreign invaders.
Answer the following statement true (T) or false (F)
What is true of the semilunar valves?
A) They are both on the right side of the heart. B) They lie between the atria and the ventricular chambers on each side of the heart. C) They lie between ventricles and the large arteries that leave the ventricles on each side of the heart. D) They are both on the left side of the heart.
Which types of neurons are typically in a reflex arc?
A. Sensory neurons, interneurons, and motor neurons B. Bipolar neurons and motor neurons C. Sensory neurons and interneurons D. Sensorineurons, multipolar neurons, and interneurons
Which type of inheritance is a phenomenon in which two or more genes contribute to a single phenotypic trait?
a) multiple allele b) incomplete dominant c) polygenic d) pleiotropic