Human Biology Essays, Research Papers & Term Papers (418) essays
Human Biology essays:
Muscle Fatigue
... cell to become acidic. The acids in muscles cause the fibers' calcium-binding capacity to decrease, which then limits muscle contraction, which causes muscle fatigue. (Mullick) During muscle fatigue, feedback of nerve impulses from the fatigued muscles ...
Understanding Obesity
... Obesity is defined as an abnormal accumulation of body fat, usually 20% or more over an individual's ideal body weight (Ford-Martin, 2003). Not long ago, obesity was revered as a sign of wealth. But in the 1900s, the ideal body type began to get thinner ...
The nervous system and its bodily functions.
... signal is a muscle cell, the effect might be a muscle contraction. The speed of the electrical impulse depends on the size of the nerve fiber. In small nerves, the rate it transmits impulses is from a half to two meters a second. The larger the diameter of the nerve fiber ...
Biology Ecology Essay - Human Population Control
... achieved more easily by a majority of student population followed by a decrease in total high school graduate. Secondly it will not have too many undergraduate dropped out in the middle of education pursuit due to a broad capacity and a relaxation ...
The humane genome project
... new knowledge about human biology. Cells are the fundamental working units of every living system. All the instructions needed to direct their activities are contained within the chemical DNA (deoxyribonucleic acid ...
Male Circumcision: A Social and Medical Misconception
... incomplete myelinization of the nerve. (Myron & Maguire, 1991) Although ... often delegated to the new physician with little direct supervision ... permanently alters a normal, healthy body part. This paper examines the ... bleeding ranges from 0.1% to as high as 35%. (Snyder ... University of Johns Hopkins Running ...
What role do Glia cells play in the neural functioning?
... contraction of the muscles) and the autonomic nervous system (are responsible to control glandules and involuntary activities in the body such as rhythm cardiac). So the neurons are special cells that are capable to receive stimuli messages and transferring those stimuli for responses. The function ...
The Skeletal System
... muscles contract they pull the bones. The skeleton is an excellent form of protection as it encases the vital organs of the body and produces white blood cells, which fight off disease within the body. The skeleton also produces red blood cells ...
Tampering with DNA
Tampering with the specific DNA that affects how a human may be born is a bad idea. There can be many adverse affects from this. Some may think that the changes they are making will help but, in fact, these could greatly affect how that person lives. If humans are able to change the genetic makeup ...
Skeletal and muscular system
... muscle fiber. Control of Muscle Contraction Neuromuscular junctions are the point where a motor neuron attaches to a muscle. Acetylcholine is released from the axon end of the nerve cell when a nerve impulse reaches the junction. A wave of electrical changes is produced in the muscle cell ...