Efferent Nerves Case Study

1430 Words 6 Pages
1. Distinguish between afferent and efferent nerves. Afferent nerves are the sensory nerves. They carry information from the world to the brain and spinal cord. Efferent nerves are the motor nerves they carry information out of the brain and spinal cord to other parts of the body. Afferent nerves take in information and efferent nerves carry out information.
2. Study Figure 2.1. What makes up the Central Nervous System (CNS)? The central nervous system is made up of the brain and spinal cord.
3. When you accidentally touch a hot burner on a stove, which part of your nervous system carries the pain message from your skin to your brain? The somatic nervous system. This system carries information from your skin and muscles to
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Researchers have identified at least 50 neurotransmitters in the brain. List and describe the function of the 7 listed in your text. The seven neurotransmitters listed are Acetylcholine, GABA, Norepinephrine, Dopamine, Serotonin, Endorphins, and Oxytocin. Acetylcholine stimulates the firing of neurons and associated with learning, the action of muscles, and memory. GABA keeps neurons from firing and it helps control the precision of the signal being carried from one neuron to the next. Norepinephrine stimulates the firing of neurons in the central nervous system and it helps control alertness. It also excites the heart muscle, intestines, and urogenital tract. Dopamine plays a role in helping to control voluntary movement, sleep, mood, attention,learning, and the ability to identify rewards. Serotonin is involved with the regulation of sleep, mood and attention. Endorphins stimulate the firing of endorphins and defend the body against pain and promote feeling of pleasure. For example if you were in a severe accident your endorphin levels would raise and you feel less pain. Oxytocin helps you experience love and social …show more content…
Comment on the article “Protecting the Athlete’s Brain” on pg. 74. Did you play competitive sports (specifically football, soccer, or hockey)? What precautions are being taken to protect athletes from brain injuries and should more be done? Comment on your own personal experience. I believe that they should watch players in contact sports more closely and have more regulations. Contact sports are very dangerous and high schoolers especially need to monitored more carefully. I also found it very interesting that no one really noticed McCoy’s head injuries. As a child I played soccer and I did receive a few blows to head. One precautions is that the CDC is encouraging high school coaches head injuries. The NFL has also made it so an independent observer is at every game to monitor potential head injuries. My brother is in football, basketball, baseball, and used to wrestle and has received several concussions. If he gets one more he can’t play contact sports anymore. I also was in soccer as child and received a mild concussion when I was hit in the head by a ball, since about fifth grade I have quit all contact sports and only participate swim team and track.
16. Explain how dominant and recessive genes affect our development.
Genes affect how we look and act. The dominant gene overrides the recessive gene. For example if your mom has brown eyes and your dad has blue eyes you are more likely to have brown eyes because brown eyes are dominant and blue eyes are recessive.

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