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BIOD 151 Modul 6 Exam Questions and Correct Answers. 100% CORRECT. Portage Learning

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M6: Exam- Requires Respondus LockDown Explain two reasons why a woman with low levels of LH would not be able to become pregnant. Your Answer: 1- LH provides on the ovary to cause ovulation to occu... r. 2- Progesterone is very important for maintenance pf pregnancy. LH makes progesterone release. And it helps to make easy potential fertilization of the egg and pregnancy. (1) LH acts on the ovary to cause ovulation to occur. (2) LH causes progesterone release to facilitate potential fertilization of the egg and pregnancy. Progesterone is a key hormone for the maintenance of pregnancy. Would you expect a female to have testosterone in their bloodstream? Explain why or why not. Your Answer: Yes. Female and male bodies both produce all the sex hormones. But ratios are different. The adrenal glands mostly responsible for produce opposite hormone that the ovaries would not. (1) Yes. Both male and female bodies produce “all” the sex hormones. However, the ratios are different. (2) The adrenal glands are largely responsible for producing this “opposite” hormone that the ovaries would not. Label the endocrine glands (A-D) A: B: C: D: Your Answer: A: Thyroid B: Adrenal gland C: Kidney D: Pancreas A: Thyroid gland B: Adrenal gland C: Kidney D: Pancreas Explain the concept of negative feedback and how it helps to maintain homeostasis. Your Answer: The impact or increased level of the hormone makes to stop the continued release of the hormone. The brain is often monitoring hormone levels to hold levels within a particular range or set-point. Negative feedback is a way of shutting off hormone production when the wanted level is reached. 1- The effect or increased level of the hormone acts to shut down the continued release of the hormone. 2- The brain is constantly monitoring hormone levels to keep levels within a certain range or set-point (homeostasis). Negative feedback is a way of “turning off” hormone production when the desired level is achieved This type of hormone is derived from cholesterol: Peptide hormones Catecholamines Steroid hormones Tyrosine Growth hormone A. is most active during childhood/adolescence. B. can cause disease if levels are not correct. C. cannot affect an adult. D. A &B Neurosecretory cells are a part of what endocrine organ? Thalamus Pituitary Cerebellum Hypothalamus Which hormone production is increased with sunlight? MSH –melanocyte stimulating hormone Melatonin Cortisol GH -Growth hormone The posterior pituitary stores these two hormones: ADH and LH ADH and Oxytocin LH and FSH TSH and Prolactin List the hormone(s) that best describes the statement below: I lower the level of calcium in the blood by depositing calcium into bone. Your Answer: Calcitonin. Calcitonin List the hormone(s) that best describes the statement below: I am secreted by the pituitary and stimulate the gonads. Your Answer: FSH or LH (Gonadotropic hormones) FSH LH Gonadotropic hormones List the hormone(s) that best describes the statement below: I am secreted by the beta cells of the pancreas. Your Answer: Insulin. Insulin List the hormone(s) that best describes the statement below: I cause blood glucose to rise and breakdown stored nutrients. Your Answer: Glucagon. Glucagon Answer the following question. Explain in detail how PTH and calcitonin work to maintain calcium balance. Your Answer: Parathyroid hormone works in concert with another hormone, calcitonin, that is produced by the thyroid to maintain blood calcium levels. PTH increases the calcium level in the blood. Thus, eventually the calcium in bone is decrease. But calcitonin is get lower the levels of calcium in the blood and it deposit calcium into the bone. They work oppeses. Basically, parathyroid hormone acts to increase blood calcium levels, while calcitonin acts to decrease blood calcium levels. Calcitonin: produced by the thyroid glands, deposits calcium into bone. Calcitonin opposes the action of PTH. When the blood calcium level reaches the appropriate level through all these means, the parathyroid glands stop producing PTH through negative feedback. PTH: produced by the parathyroid glands increase the amount of calcium in the blood. (Any one of the following explanations of PTH is acceptable) PTH stimulates the increased absorption of calcium from the intestines. PTH retains calcium through excreting phosphate at the kidneys. In the bones, PTH promotes the activity of osteoclasts to demineralize of the bone, increasing the amount of calcium in the blood. Which hormone/s are involved in milk production? A. Thyroxin B. Oxytocin Correct Answer C. Prolactin D. B &C E. A&B Which gland decreases in size with age? Thyroid Thymus Pituitary Adrenal Iodine is needed to produce which hormone/s? A. Gonadotropic B. T3 C. T4 D. TSH E. B & C (Thyroid hormones cannot be produced without iodine) Which of the following is NOT a function of oxytocin? Growth of uterus and vagina Uterine contraction Milk letdown Given to aid in childbirth process Which hormones are produced in the anterior pituitary? TSH, MSH, and calcitonin ADH, GH, and prolactin ACTH, FSH, and GH. PTH, TSH, and LH Explain in detail why the thyroid becomes enlarged during an iodine deficiency? Your Answer: When the iodine is lacking in the diet, the thyroid enlarges in what is called a goiter. When the low level of thyroxin in the blood happened, the anterior pitutary keeps to produce TSH. And then the thyroid answers by increasing in size and producing goiter. However this increase in size is not effective, because active thyroxin can not be produced without iodine. When there is a low level of thyroxin in the blood, the anterior pituitary continues to produce TSH. The thyroid responds by increasing in size and producing a goiter, but this increase in size is ineffective because active thyroxin cannot be produced without iodine. Matching each of the following conditions with the one best explanation (1-5): 1. Jet Lag A. Underproduction of GH as a child 2. Pituitary dwarf B. Overproduction of GH as a child 3. Acromegaly C. Overproduction of GH as an adult 4. Inflammation D. Results if PTH is not produced in response to low blood calcium 5. Tetany E. Cortisol helps to counteract this condition F. Melatonin production is produced according to body’s normal rhythm G. Lack of erythropoietin to act on the bone marrow H. Results if calcitonin is not produced in response to low blood calcium 1. Jet Lag 2. Pituitary dwarf 3. Acromegaly 4. Inflammation 5. Tetany Other Incorrect Match Options: • B. Overproduction of GH as a child • H. Results if calcitonin is not produced in response to low blood calcium • G. Lack of erythropoietin to act on the bone marrow In addition to the endocrine system, the pancreas is also part of which system? Excretory Nervous Circulatory Digestive What hormone/s are produced by the adrenal medulla? A. Epinephrine B. Glucocorticoids C. Mineralocorticoids D. B & C Question 24 2 / 2 pts Which of the following is false regarding aldosterone? It is a regulated by the concentration of sodium. It causes the kidneys to excrete potassium and retain sodium. It causes the kidneys to retain potassium and excrete sodium. It is a mineralocorticoid. It increases blood pressure If you were experiencing kidney disease, what hormone level would be low and what would occur? PTH, tetany Calcitonin, tetany Erythropoietin, anemia Erythropoietin, stress response Question 26 2 / 2 pts Which of the following is true regarding estrogen? Production is highest in childhood. It causes growth of the uterus and vagina. It decreases fat storage. It causes females to have a narrower pelvis (compared to males). Quiz Score: 98 out of 100 [Show More]

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