PART II. Putting It All Together A. Review Questions Answer the following questi

Question

PART II. Putting It All Together A. Review Questions Answer the following questions using your lecture notes, your textbook, and/or your lab notes. 1. Briefly describe one example of how the circulatory, respiratory, and digestive systems work together to maintain homeostasis. Briefly describe one example of how the nervous, endocrine, and circulatory systems work together to maintain homeostasis. 2. Calcium ions play a major role in many physiological events. A decline in blood calcium levels is regulated primarily by parathroid hormone (PTH) released by the parathyroid gland. PTH stimu- 3. lates certain bone cells to break down bone, the small intestine to absorb more calcium from the diet, and the kidneys to reabsorb more calcium from the blood. As a result of these actions, blood calcium levels rise, and PTH release is then inhibited. a. List three organ systems involved in the maintenance of blood calcium levels, and state the role of each organ system in the process. b. Is blood calcium regulation an example of negative feedback control or positive feedback con- trol? Explain.C Sboc

Explanation / Answer

Part-1 maximum tasks within the body need the aid of two or more organ structures working together. take cell respiration, as an instance. this project calls for oxygen and meals. the respiratory device brings oxygen into the lungs when you breathe. the digestive system breaks meals down into vitamins such as glucose. now the circulatory device enters the picture. it transports glucose and other nutrients from the digestive device to the cells. the circulatory system also transports oxygen from the lungs to the cells. now the cells have what they want for cellular respiratory: oxygen and glucose.
the teamwork doesn’t end there, however. the circulatory system
also transports carbon dioxide waste from the cells to the lungs of the respiration device. thru gasoline alternate within the lungs, the carbon dioxide waste is eliminated from your frame whilst you breathe out.

Part-2 the circulatory device works with all other body systems. because it provides blood to all of the body components, it may help different body systems to do their jobs. endocrine system has ductless glands. this means that they launch the hormones without delay into the blood. which then unfold to our frame by way of the circulatory device and maintain homeostasis. the fearful system controls voluntary and involuntary moves and is also answerable for the coordination and stability of our body. the impulses are introduced to the mind by using blood and the messages or commands are delivered lower back to the effector via blood- circulatory system.

Part-a

calcitriol
the most lively shape of vitamin d produced by using the sequential motion of the skin, liver, and kidneys.

calcitonin
a hormone produced through the c-cells of the thyroid gland that decreases blood calcium levels.

parathyroid hormone (PTH)
produced by means of parathyroid glands; increases blood calcium stage whilst it falls under a crucial threshold stage.

Part-b negative feedback. some other instance of bad feedback is the regulation of the blood calcium level. the parathyroid glands secrete parathyroid hormone, which regulates the level of calcium inside the blood. if calcium decreases, the parathyroid glands feel the decrease and secrete more parathyroid hormone. the parathyroid glands secrete parathyroid hormone, which regulates the extent of calcium inside the blood. if calcium decreases, the parathyroid glands experience the decrease and secrete greater parathyroid hormone. the parathyroid hormone stimulates calcium launch from the bones and increases the calcium uptake into the bloodstream from the accumulating tubules inside the kidneys. conversely, if blood calcium will increase too much, the parathyroid glands lessen parathyroid hormone production. each response is examples of poor remarks due to the fact in each instance the consequences are terrible (contrary) to the stimulus.

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