The Orangespotted Sunfish (Lepomis humilis) is often confused with other sunfishes. This species is classified in the class Actinopterygii‚ order Perciformes‚ and family Centrarchidae. One characteristic that makes them stand out from other fishes are their black and orange spots. Also‚ their operculum is lined with a solid white band. Nine to ten bars can be identified on this fish. The bars on the female have a light center‚ which is a way of gender identification when the males are outside of
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Chapter 11: Cell Communication Cell-to-cell communication is essential in multicellular organisms. They must communicate to coordinate activities such as growth and development‚ and reproduction. In addition unicellular organisms communicate with each other. Signals may use light‚ or touch but we will focus on chemical signals. 1. External signals are converted to responses within the cell a. Evolution of cell signaling i. In yeast a cells and αcells both secrete chemicals
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How neurological processes affect behaviour and impact the field of biological psychology Psychology as a field of study has evolved from the human need to understand ourselves and the causes behind our behaviours. Philosophy tried its hand first‚ attempting to describe it as a complex interaction between the mind and the body – between the mental and the physical. This basic idea resonates through this field of exploration through the years. While there have been diversions from this line of
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Reward dominance Theory “Reward dominance theory is a neurological theory based on the proposition that behavior is regulated by two opposing mechanisms‚ the behavioral activating system (BAS) and the behavioral inhibition system (BIS.)” (Walsh & Hemmens pg 304) The BAS is related with the neurotransmitter dopamine and with joy ranges in the mind. The BIS is related with serotonin and with cerebrum structures that represent memory. Neurotransmitters‚ for example‚ dopamine and serotonin are the compound
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Jamason‚ diagnosed with asthma as an infant‚ has never smoked a cigarette. One day‚ he was cleaning up at the fast food restaurant where he worked. Unfortunately‚ he was cleaning near a group of his coworkers that were on their “smoke break”. Shortly after he returned inside he started having trouble breathing. Frantically‚ he called his mother‚ who arrived to find him gasping for air. He was then hospitalized for four days after‚ for something he couldn’t have prevented. Fortunately Jamason Coles
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4. To define extrasystole‚ and to explain at what point in the cardiac cycle (and on an ECG tracing) an extrasystole can be induced. 5. To describe the effect of the following on heart rate: vagal stimulation‚ cold‚ heat‚ pilocarpine‚ atropine‚ epinephrine‚ digitalis‚ and potassium‚ sodium‚ and calcium ions. 6. To define vagal escape and discuss its value. 7. To define ectopic pacemaker. I nvestigation of human cardiovascular physiology is very interesting‚ but many areas obviously do not lend
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when there is not enough sugar or glucose to supply the body’s fuel needs. This occurs overnight‚ and during dieting or fasting. During these periods‚ insulin levels are low‚ but glucagon and epinephrine levels are relatively normal. This combination of low insulin‚ and relatively normal glucagon and epinephrine levels causes fat to be released from the fat cells. The fats travel through the blood circulation to reach the liver where they are processed into ketone units. The ketone units then circulate
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Section 1: Simply put‚ homeostasis is the maintenance of a constant internal environment in the body. (Givens and Reiss‚ 2002). To look into this definition further‚ according to Walter Cannon‚ homeostasis can be described as the way the brain coordinates body systems‚ with the aim of maintaining a set of goal values for key internal variables (Goldstein‚ 2008). Homeostasis aims to maintain a constant internal environment helping to keep internal conditions at an optimum in order for all cells in
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Graves’ Disease Hyperthyroidism and Treatments 0 comments Graves’ disease is the leading cause of hyperthyroidism. Complications can include hypertension‚ cardiac arrhythmias and thyroid eye disease but treatments are available. Jim Lowrance Posted on Aug 7‚ 2009 Graves’ disease is an autoimmune condition affecting the thyroid gland that results in abnormally high levels of thyroid hormone to be released into the body causing hyperthyroidism. There is no cure for Graves’ but progression of
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Unit 1 Case Study Addison’s disease is from a result from damage to the adrenal cortex. These two adrenal glands are located on top of the kidneys‚ where they are enclosed in a fibrous capsule and a cushion of fat. . The have an outer portion‚ called the cortex‚ which is a glandular tissue derived from embryonic mesoderm. The inner portion called the medulla‚ which is more like a knot of nervous tissue than a gland and it is part of the sympathetic nervous system. The adrenal
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