Which of the following describes smooth muscle contraction but not skeletal muscle contraction?

Which of the following statements is true about teeth?

A. The primary component of teeth is dentin. B. The outer surface of enamel forms the crown of a tooth. C. The root is covered by cementum. D. All of the choices are correct.

Males and females produce androgenic hormones

Indicate whether the statement is true or false

Which of the following organs will NOT send blood to the hepatic portal vein?

a) kidneys b) small intestine c) spleen d) stomach

The __________ flattens during inhalation

A- nasal cavities B- epiglottis C- bronchi D- diaphragm