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One of the first synthetic plastics was discovered by Dr. Leo H. Baekeland as a result of the chemical reaction of phenol and ____.

Automatic sorting systems detect the chemical makeup of material, such as the ____ systems that detect opacity.

Problems possibly linked with poor working conditions such as anxiety and irritability, substance abuse, sleeping difficulties, headaches, and gastrointestinal symptoms are classified as resulting from a(n) ____ hazard. 

The simplest endocrine control system directly responds to changing blood levels of ions and nutrients to stimulate hormone secretion. Which of the following is this simplest endocrine control system?

The aorta is an elastic artery that receives the full force of blood exiting the heart during ventricular systole. Which of the following characteristics of elastic arteries enables the aorta to withstand the full force of blood?

The normal heart sounds you hear when you auscultate the heart with a stethoscope reflect _________.

Vascular anastomoses benefit the body by___________.

Which statement about the structure of the heart wall is correct (TRUE)?

Match the vein to its description.

The blood vessels that carry blood to the capillaries in the myocardium are the ________.