DiscussionAnimals_Week_4 - and why they are involved...

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Mammalian Anatomy – Kidney, hormones, stress and reproduction Discussion Questions: Please make sure to answer all of the homework questions. All answers must be typed unless you are asked to make a drawing or diagram. 1. Why is the hypothalamus considered to be the master controller of hormonal function? In your answer consider the interaction of functions between the hypothalamus, anterior and posterior pituitary and the various target organs. The hypothalamus acts on input that it receives from the central nervous system. It acts as the interface between environmental signals perceived by the brain and internal physiological responses. 2. Describe and contrast the nature and rapidity of the adrenaline and cortisol responses to stress. In your answer, consider the biological mechanisms & organs
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Unformatted text preview: and why they are involved. Cortisol stimulates glucose release from the liver and promotes the conversion of protein and fat into glucose to help the body withstand long-term environmental challenge. Adrenaline causes a rapid stimulation in basic metabolic rate, glycogen breakdown to glucose in the liver and skeletal muscle, release of fatty acids from fat cells, increase in heart rate and diversion of blood circulation from the gut, skin and kidneys to skeletal muscle and brain. 3. Hormones often act in antagonistic fashion. That is one hormone will initiate a certain response, while another inhibits that response . Illustrate (draw) this using insulin and glucagon as examples of antagonistic hormones. 4. Review the male and female gametophyte production for an in-class activity. Drawing the diagrams is highly recommended but not required. 1 of 1...
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