Pros and Cons of Genetically Modified Food

Along with the unprecedented scientific progress the humankind has achieved, new unexplored territories have been uncovered by researchers. Genetically modified foods, produced from crops grown from seeds with genetically engineered DNA, have been a hot topic throughout the past few decades (Gaskell et al., 1998; Marchant, 2001). The holders of the genetic information in every live organism, the genes, which are small fragments of the DNA chain, are intentionally manipulated to enhance the manifestation of some desirable traits, or to suppress the expression of other, unwanted features (e.g., genetic diseases).

Marijuana is among the most popular leisure drug in the World. Many people have smoked marijuana, and they do so despite the harsh laws placed against its use. It is non-toxic and cannot cause death. Significantly, it has a wide range of clinical uses such as relieving pain and nausea. In addition, marijuana is the appetite stimulating agent and less dangerous compared to alcohol and tobacco. Certainly, public policies should reflect this reality and legalize it.

Cardiac fibers contract through the process of excitation-contraction coupling which involve the conversion of an electrical stimulus to a mechanical response. In essence, contraction and relaxation help to regulate the flow of blood in the arteries, as well as the flow of the air through the lungs. Contraction involves a precise interaction of contractile proteins, calcium ions, and energy phosphates. Besides, the cardiac fibers relax to return the heart muscles after contraction to the initial conditions. Throughout life, cardiac cycle is significant as it enables the heart to contract 70 times per minute hence supplying five liters of blood to the body.

Introduction

Sound waves that cannot be detected by the ear and are around 20,000 Hz in frequency are called ultrasound. These frequencies range from a minimum of 2MHz and a maximum of 18 MHz when used in Ultrasonography. (Robertson, 2001) The procedure of ultrasound is usually carried out from the external part of the patient’s body (American college of Radiology, 2011).