cord)‚ and the Peripheral Nervous System (neurons that carry messages to and from the CNS). 2. Describe the composition and function of the cell body. How are xons and dendrites alike? How do they (structurally and functionally) differ? The nerve cell body contains the nucleus‚ rough ER (Nissl bodies)‚ and cytoplasm. It is the major biosynthetic center and the main body for the outgrowth of neuronal processes. Axons and Dendrites are both arm-like extensions from the cell body. Dendrites are
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Muscle tissue Muscle tissue has a ability to relax and contrast and so bring about movement and mechanical work in various parts of the body. There are other movements in the body too which are necessary for the survival of the organism such as the heart beat and the movements of the alimentary canal. Muscles can be divided into three main groups according to their structure * Smooth muscle tissue. * Skeletal muscle tissue. * Cardiac (heart) muscle tissue.
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problems with nerve impulses that can lead to depression. There are many drugs that can intentionally change these normal chemical processes in our brain to maintain the feeling of happiness; however‚ these drugs are extremely dangerous to the human body and are unhealthy for humans. `The brain is a complex organ that has a complex‚ but quick process of delivering the neurotransmitters to the receptors. Neurons communicate with each other by sending electrical signals‚ nerve impulses‚ through tube
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1m c The impulse spreads through the atria / right atrium / cardiac muscle 1m to the atrioventricular node‚ 1m then to the base of the ventricles along the septum. 1m Structured questions (p. 78) 7 a i Fall in pH / increase in acidity / carbon dioxide level 1m ii Respiration occurring inside the cells 1m b The respiratory centre sends impulses 1m to the diaphragm muscles / intercostal muscles‚ causing them to contract. 1m c As lungs inflate‚ the frequency of impulses from stretch
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"Explain the concept of homeostasis with reference to the control of heart rate‚ breathing rate‚ body temperature and blood glucose levels" P5 Homeostasis is where the body keeps a constant internal environment. This involves all the metabolic processes taking place In the body as well as the blood‚ tissue fluid and all the contents in the body ’s cells. There are a range of variables from heart rate to the blood glucose levels that the body will take into account. Negative feedback will occur
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Homeostasis by definition is the technical term for the process of maintaining a constant internal environment despite changes in the external environment. The internal environment comprises of blood‚ tissue fluid‚ body cell contents and all metabolic processes taking place inside the body. This process is essential to the survival of a person and to our species as a whole. The liver‚ the kidneys‚ and the brain (hypothalamus‚ the autonomic nervous system and the endocrine system) help maintain
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coli and Klebsiellaparticularly Pseudomonas aeruginosa. Effective against Aerobic bacteria (not obligate/facultative anaerobes) andtularemia. | * Hearing loss * Vertigo * Kidney damage | Binding to the bacterial 30S ribosomal subunit (some work by binding to the 50S subunit)‚ inhibiting the translocation of the peptidyl-tRNA from the A-site to the P-site and also causing misreading of mRNA‚ leaving the bacterium unable to synthesize proteins vital to its growth. | Gentamicin | Garamycin | | | | Kanamycin | Kantrex | |
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H E E T EXERCISE 21 Print Form Spinal Cord‚ Spinal Nerves‚ and the Autonomic Nervous System Anatomy of the Spinal Cord 1. Match each anatomical term in the key to the descriptions given below. Key: a. cauda equina 1. 2. 3. 4. b. conus medullaris c. filum terminale d. foramen magnum most superior boundary of the spinal cord meningeal extension beyond the spinal cord terminus spinal cord terminus collection of spinal nerves traveling in the vertebral canal below the terminus of the spinal
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The objective of this report is to critically explain the physiological effects of exercise on the human respiratory system and cardiovascular system. To begin with‚ I will explain the two systems‚ their specific functions and how they inter-relate. I will then go on to analyse the effects of exercise on the two systems by looking at the way in which the body deals with an increased workload‚ and any health issues that may affect this. Cardiovascular system This system is responsible for pumping
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viruses and germs. With the autoimmune disease‚ the immune system makes antibodies against parts of one’s own body tissues. In a person with normal immune system‚ muscles are stimulated to contract by the transmission of nerve impulses to the muscle fibers. The nerve impulses cause neurotransmitter acetylcholine to be released into the synaptic cleft. There it is picked up by the acetylcholine
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