What did evolution do to our muscles Essay Example | Topics and Well Written Essays - 1500 words - 1

What did evolution do to our muscles - Essay Example However, humans do not come close to comparing to chimps’ strength and the percentage points that humans and chimps differ are extreme due significant anatomical and physiological differences. The way in which muscles are attached to bones is different in chimps compared to human, which enables chimps to have enhanced mechanical advantage in both arms and strength. The paper explores why chimps enjoy powerful strength relative to humans. Evolution changes manifest on the genetic levels passed from one generation to another. The changes manifest at the genetic level overtime as the organisms’ genes mutate and/or recombine within diverse ways during reproduction and are passed to future generations. Scientific evidence demonstrates that the physical and behavioral traits shared by humans emanated from apelike ancestors and evolved overtime. Bipedalism remains one of the most prominent human traits highlighting how humans have evolved. Other traits include development of a large and complex brain, capacity for language, and capability to make and utilize tools. Muscle contractions form the basis of movement within a majority of the species (Muehlenbein 137). Chimps are stronger that humans centers on the fact that they do not have closely as many fine control over their muscles. Humans enjoy the capability to d precise things such as operating complex machinery, which necessitates choice of minute sizes of muscle fibers. Hence, humans sacrifice strength over precise control of their muscles. The nervous system exercises significant control over the muscles relative to the chimp muscles. Studies have revealed that chimps have relatively reduced grey matter within their spinal cord compared to humans. Spinal grey matter features a significant amount of nerve cells that link to muscle fibers and control muscle movement. This details the process that allows finer control of the muscles. As a result,

Protein Research Paper Example | Topics and Well Written Essays - 6250 words

Protein - Research Paper Example Results indicated antibacterial activity to be present in pepsin-digested lactoferrin and F2 sample. Thus, purification of lactoferricin obtained through peptic digestion of bovine lactoferrin was accomplished by fractionation of the hydrolysate using cation exchange chromatography. Lactoferrin (Lf) is an iron-binding glycoprotein and, as the name suggests, is a constituent of milk. It is also found, to a lesser extent, in various mucosal (exocrine) secretions of mammals that are commonly exposed to normal flora such as tears, nasal exudate, saliva, bronchial mucus, gastrointestinal fluids, cervicovaginal mucus and seminal fluid (Weinberg, 2003). Also, Lf is produced by secondary granules of polymorphonuclear neutrophils for deposition at septic sites. The granular contents of neutrophils can be released into inflammatory fluids after neutrophil death, by what is known as "holocrine secretion". The protein is closely related to transferrin, the iron-transport protein present in the plasma. Lactoferrin is a multifunctional innate-defense protein, known to exert a broad-spectrum primary defense activity against microbes including bacteria, fungi, protozoa and viruses (Orsi, 2004), and even some antibiotic-resistant pathogens (Wakabayashi et al., 2003). Lf is foun d in high concentrations in breast milk (~3–7 mg/ml) and tear fluid (1–4 mg/ml) (Rogan et al., 2006). Among the many constituents of milk which have revealed antimicrobial activity, lactoferrin exhibits both bacteriostatic and bactericidal activity against a wide array of microorganisms, including those causing gastroenteric infections, food poisoning, listeriosis and mastitis (Dionysius et al., 1993). Recently, clinical trials have demonstrated that bovine lactoferrin (bLF) administration can reduce the risk of colon carcinogenesis in humans (Tsuda et al., 2010). A key role of Lf is to scavenge non-protein-bound iron in body