An overdose can have toxic effects. A blood test can determine the phenytoin level to aid in correct dosing and avoid toxicity. An element required for bone growth and metabolic energy. Stored in teeth and bones, mainly in combination with calcium, phosphorus blood levels are affected by parathyroid, blood, and bone diseases. A unit or particle of radiant or light energy.
Photons have no electric charge.
Gamma and X-rays may be referred to as photons. A bi-lobed endocrine gland located at the base of the brain that secretes several critical hormones for the regulation of other endocrine glands, including the secretion of TSH for stimulation of the thyroid. The pituitary is regulated by the neurohormones from the hypothalamus. The watery fluid portion of blood in which the corpuscular elements are suspended. It transports nutrients as well as wastes throughout the body.