Loose Leaf For Integrated Principles Of Zoology
18th Edition
ISBN: 9781260411140
Author: Cleveland P Hickman Jr. Emeritus, Susan L. Keen, David J Eisenhour Professor PhD, Allan Larson, Helen I'Anson Associate Professor of Biology
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 34, Problem 9RQ
What is the evolutionary origin of the pineal gland of birds and mammals? Explain the role of the pineal hormone, melatonin, in regulating seasonal reproductive rhythms in birds and mammals. Does melatonin have any function in humans?
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What is the evolutionary origin of the pineal gland of birds and mammals? Explain the pineal hormone's role, melatonin, in regulating seasonal reproductive rhythms in birds and mammals. Does melatonin have any function in humans?
What is the evolutionary history of birds and mammals' pineal glands? Explain how the pineal hormone melatonin helps birds and mammals regulate seasonal reproductive rhythms. In humans, what role does melatonin perform?
Identify which of the following hormones characteristically regulates the activity of the cell whose nucleus is marked by the arrow in the two images below?
(A) luteinizing hormone
(B) gonadotropin-releasing hormone
(C) 5-alpha-reductase
(D) follicle-stimulating hormone
(E) inhibin
Chapter 34 Solutions
Loose Leaf For Integrated Principles Of Zoology
Ch. 34 - Outline Bertholds first endocrine experiment. What...Ch. 34 - Prob. 2RQCh. 34 - Prob. 3RQCh. 34 - What is the importance of feedback systems in the...Ch. 34 - Give two examples of invertebrate hormones that...Ch. 34 - Explain how the three hormones involved in insect...Ch. 34 - Name seven hormones produced by the anterior...Ch. 34 - Prob. 8RQCh. 34 - What is the evolutionary origin of the pineal...Ch. 34 - What are endorphins and enkephalins? What are...
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- How do hormones compare structurally and functionally in invertebrates and vertebrates?arrow_forwardSex hormone secretion is governed by a negative feedback loop to the hypothalamus and pituitary, similar to that for thyroid hormone or cortisol. Because of this, a veterinarian can use a blood test to find out whether a female dog has been neutered. Dogs who still have their ovaries have a lower blood level of luteinizing hormone (LH) than dogs who have been neutered. Explain why removing a dog’s ovaries would result in an elevated level of LH.arrow_forwardIn Modules 2 and 3, we have discussed many different hormones and the mechanisms in which these hormone levels are regulated. Many hormones, including FSH, LH, progesterone, and estrogen are controlled through a negative feedback system. Although higher levels of estrogen in the follicular stage suppress the secretion of FSH and LH in the anterior pituitary, there is an LH spike at day 14 (ovulation).Can you provide an explanation as to why an LH/FSH spike may occur using the estrogen feedback loop?arrow_forward
- What is the role of progesterone in the vertebrate body?arrow_forwardWhich of these assertions about hormones is not accurate? Which of these assertions about hormones is not accurate? A.)Hormones produced by the hypothalamus are considered neurohormones. B.) Cortisol is released in response to the release of ACTH from the pituitary. C.) Hormonal changes during puberty and pregnancy are forms of endocrine disruption. D.) Growth and metamorphosis are controlled by hormones.arrow_forwardWhat hypothalamic hormone triggers the release of ACTH from the anterior pituitary gland? What is the function of gonadotropin releasing hormone? Where is it released from? Know Table 16.2 Pituitary Hormones: Summary of Regulation and effects What is the function of oxytocin? What stimulates its release?What inhibits its release? What is its effects on the uterus? What is its effect on the breast? What is the function of ADH? What stimulates its release? What inhibits its? What is diabetes insipidus What is the function of Growth Hormone? What stimulates its release? What inhibits it? What are its effects on target organs? What is gigantisism, acromegaly and dwarfism? What is the function of TSH? What stimulates its release? What inhibits it? What are its effects on target organs? What are the effects of hypothyroidism and hyperthyroidism What is the function of ACTH? What stimulates its release? What inhibits it? What are its effects on target organs? What is cushing syndrome?…arrow_forward
- What role do feedback mechanisms play in the regulation of hormone production in mammals? Give two examples of hormonal feedback patterns.arrow_forwardName six hormones secreted by the anterior lobe of the pituitary gland. Name two hormones secreted by the posterior lobe of the pituitary gland. Name the pituitary hormone responsible for the following actions: a. stimulates ovarian follicle to secrete estrogen and egg development b. causes kidneys to conserve water c. stimulates cells to increase in size and divide more rapidly d. essential for egg release from the ovary e.stim ulates secretion from thyroid gland f. causes contraction of uterine wall muscles g. stimulates secretion from adrenal cortex h. stimulates milk production 4. Name two thyroid hormones that affect metabolic rate. 5. Name a hormone secreted by the thyroid gland that acts to lower blood calcium. 6. Name a hormone that acts to raise blood calcium 7. Name three target organs of parathyroid hormone. 8. Name two hormones secreted by the adrenal medulla. 9. List five different effects produced by these medullary hormones. 10. Name the most important…arrow_forwardWhy are animals with temperature-dependent sex determination at risk from endocrine disruptors?arrow_forward
- Often, two hormones have opposite (antagonistic) effects on the same target organs. For example, oxytocin stimulates labor contractions, and progesterone inhibits premature labor.Name some other examples of antagonistic effects among the hormones?arrow_forwardWhat are four actions of hormones in invertebrates?arrow_forwardWhat are the two hormones released from the posterior pituitary? a. mineralocorticoid and glucocorticoid b. luteinizing hormone and follicle-stimulating hormone c. epinephrine and norepinephrine d. oxytocin and vasopressin When mechanical force is absorbed by a sensory receptor, the energy is transduced into a local depolarization or hyperpolarization that can be large or small depending on the strength of the stimulus. What is this called? a. an opponent process b. an action potential c. a graded receptor potential d. conscious awareness of sensationarrow_forward
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