|
|
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.
Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.
The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
![Atherosclerosis. (a) A sectioned coronary artery that exhibits an accumulation of fatty plaque, whic](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_14_25_100211581.jpeg)
![Inflammation. Inflammation is characterized by the presence of swelling, redness, heat, and pain. Sw](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_18_45_10040570.jpeg)
![Physiological effects of the accumulation of lactose in the intestines of a lactose-intolerant indiv](https://biology-forums.com/gallery/47/medium_274247_21_01_15_7_40_16_20282429.jpeg)