BIOD 151 Module 6 Exam Latest Exam w Brand New Q & A

BIOD 151 Module 6 Exam Latest Exam w/ Brand New Q & A BIOD 151 Module 6 Exam Latest Exam w/ Brand New Q & A M6: Exam- Requires Respondus LockDown Browser Due No due date Points 100 Questions 26 Requires Respondus LockDown Browser Time Limit 60 Minutes Attempt History Attempt Time Score LATEST Attempt 1 60 minutes 100 out of 100 Score for this quiz: 100 out of 100 Submitted Feb 16 at 8:50am This attempt took 60 minutes. Question 1 5 1 5 pts Explain two reasons why a woman with low levels of LH would not be able to become pregnant. Your Answer: LH causes ovulation to occur and it causes progesterone release, which is the most important hormone for maintaining pregnancy. Low LH would prevent a woman from becoming pregnant. (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. Question 2 5 1 5 Pts Would you expect a male to have estrogen in their bloodstream? Explain why or why not. Your Answer: Yes. Both genders produce all the sex hormones, but the levels of each hormone vary by gender. For men, the gonads make testosterone and the adrenal glands secret estrogen. (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 testis would not. Question 3 10 1 10 Pts Label the endocrine glands (A-D) B: c: D: Your Answer: a. thyroid gland b. adrenal gland c. kidney d. pancreas A: Thyroid gland B: Adrenal gland C: Kidney D: Pancreas Question 4 10 1 10 pts Explain the concept of negative feedback and how it helps to maintain homeostasis. Your Answer: The brain monitores hormone levels to maintain homeostasis. In a negative feedback loop, the increased level of a hormone signals feedback to stop the continued release of that hormone. 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 Question 5 2 1 2 pts This type of hormone is derived from cholesterol Peptide hormones Catecholamines O Steroid hormones Tyrosine Correctl Question 6 2 1 2 pts Growth hormone A. is most active during childhood/adolescence. B. can cause disease if levels are not correct. C. cannot affect an adult. Correctl Question 7 2 1 2 pts Neurons in the hypothalamus are called Neurosecretory Vasopressin Melanocytes Somatotropic Correctl Question 8 2 1 2 pts Which hormone production is increased with sunlight? o MSH —melanocyte stimulating hormone Melatonin Cortisol Correctl GH -Growth hormone Question 9 2 1 2 pts The posterior pituitary stores these two hormones: ADH and Prolactin TSH and LH LH and FSH ADH and Oxytocin Correctl Question 10 2.5 1 2.5 pts 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 Question 11 2.5 1 2.5 Pts 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 Gonadotropic hormones Question 12 2.5 1 2.5 pts List the hormone(s) that best describes the statement below: I am secreted by the pituitary to stimulate the adrenal cortex. Your Answer: ACTH ACTH Question 13 2.5 1 2.5 pts List the hormone(s) that best describes the statement below: I cause blood glucose to rise and breakdown stored nutrients. Your Answer: glucagon Glucagon Question 14 10 1 10 pts Answer the following question. Explain in detail how PTH and calcitonin work to maintain calcium balance. Your Answer: Parathyroid hormone (PTH) causes calcium absorption from the intestines and it keeps calcium when the kidneys eleminate phosphates. It also stimulates demineralization of bone, which then causes calcium to increase in the blood. PTH and calcitonin work togeather to maintain blood calcium levels. PTH increases the calcium level in blood. Calcitonin lowers the calcium levels in blood and deposits calcium into the bone. When blood calcium levels are adequate, the parathyroid glands stop producing PTH. 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. Question 15 2 1 2 pts Where is thyroid stimulating hormone produced? Pineal Thyroid Thymus Anterior Pituitary Posterior Pituitary Correctl Question 16 2 1 2 pts Which gland decreases in size with age? Thyroid O Thymus Pituitary Adrenal Correctl Question 17 2 1 2 pts Iodine is needed to produce which hormone/s? A. Gonadotropic D. TSH E. B&C (Thyroid hormones cannot be produced without iodine) Correctl Question 18 2 1 2 pts Which of the following is NOT a function of oxytocin? Growth of uterus and vagina Correctl Uterine contraction Milk letdown Given to aid in childbirth process Question 19 2 1 2 pts Which hormones are produced in the anterior pituitary? TSH, MSH, and calcitonin ADH, GH, and prolactin Ô ACTH, FSH, and CH. PTH, TSH, and LH Correctl Question 20 10 1 10 pts Explain in detail why the thyroid becomes enlarged during an iodine deficiency? Your Answer: When idodine is lacking in the diet, the thyroid enlarges (goiter). If thyroxin is low, TSH is produced and the thyroid increases in size. An enlarged thyroid is not effective, because thyroxin can't 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. Question 21 10 1 10 pts Matching each of the following conditions with the one best explanation 1. Congenital hypothyroidism A. Overproduction of GH as a child 2. Pituitary giant B. Underproduction of GH as a child 3. Acromegaly C. Low thyroxin production since birth 4. Tetany D. High thyroxin production since birth 5. Anemia E. Lack of erythropoietin to act on the bone marrow F. Results if PTH is not produced in response to low blood calcium G. Results if calcitonin is not produced in response to low blood calcium H. Overproduction of GH as an adult C. Low thyroxin prodi 1. Congenital hypothyroidism Correctl A. Overproduction of 2. Pituitary giant H. Overproduction of 3. Acromegaly F. Results if PTH is n 4. Tetany E. Lack of erythropoi( 5. Anemia Other Incorrect Match Options: • D. High thyroxin production since birth • B. Underproduction of GH as a child • G. Results if calcitonin is not produced in response to low blood calcium Correctl Correctl Correctl Correctl Question 22 2 1 2 pts In addition to the endocrine system, the pancreas is also part of which system? Excretory Nervous Circulatory (O Digestive Correctl Question 23 2 1 2 pts Which part of the adrenal glands is vital to life? O Cortex Medulla The entire gland None of adrenal gland is vital to life Correctl Question 24 2 1 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. O It causes the kidneys to retain potassium and excrete sodium. It is a mineralocorticoid. It increases blood pressure Correctl Question 25 2 1 2 pts If you were experiencing kidney disease, what hormone level would be low and what would occur? PTH, tetany Calcitonin, tetany O Erythropoietin, anemia Erythropoietin, stress response Correctl Question 26 2 1 2 pts Which of the following is false regarding testosterone? Production is highest in puberty. It causes growth of the sex organs. It is required for the maturation of sperm. O It causes males to have a wider pelvis (compared to females). Correctl Quiz Score: 100 out of 100