Coping with Environmental Variation: Temperature and Water

The physical environment influences an organism’s ecological success in two ways: Availability of energy and resources—impacts growth and reproduction. Extreme conditions can exceed tolerance limits and impact survival. Energy supply can influence an organism’s ability to tolerate environmental extremes. The actual geographic distribution of a species is often lower than potential distribution due to other…

Forms of Sexual Contraception & Types of Abortion

Contraception Combination Pill: Birth control pills that contain a combination of estrogen and progestin (progesterone) (21 days on, 7 placebo) The pill works by preventing ovulation; keeps estrogen high inhibits LSH and no ovulation; high progesterone inhibits LH . Keep endometrium lining thick and prevents sperms from effectively travelling Failure Rate: percentage of women who…

Diphtheria (Corynebacterium diphtheriae): History, Symptoms, Causes, Treatment

Corynebacteria are Gram-positive, aerobic, nonmotile, rod-shaped bacteria related to the Actinomycetes. They do not form spores or branch as do the actinomycetes, but they have the characteristic of forming irregular shaped, club-shaped or V-shaped arrangements in normal growth. They undergo snapping movements just after cell division which brings them into characteristic arrangements resembling Chinese letters.…

Premature Infancy & Infants: Causes & Treatment

Premature babies, otherwise known as preterm babies, or preemies, are babies that are born earlier than the full-term of thirty-eight to forty-two weeks of pregnancy. These babies are generally born between the twentieth and thirty-eighth week. Almost 250,000 babies, nearly seven percent of newborns, are premature(Golant 4). Prematurity, even with all the advances in technology,…

Treating Anaphylaxis: Treatments & Methods

In the emergency setting, anaphylaxis is a dangerous, life threatening condition that must be treated in an aggressive and timely fashion. Anaphylaxis is a condition related to acute allergic reactions. Following the body’s exposure to the offending allergen, there are common systemic reactions. The most serious reactions involve the respiratory and cardiovascular systems, but the…