05:00Growth Hormone Explained! 10 Functions of Human Growth Hormone in the body.The Movement System373views
03:04The Endocrine System: Adrenal Glands - Adrenal Cortex - Explained in 3 Minutes!5MinuteSchool380views
04:50The Adrenal Cortex vs The Adrenal Medulla | Biology Lectures SeriesMedicosis Perfectionalis400views
01:18The Endocrine System: Adrenal Glands - Adrenal Medulla - Explained in 1 Minute5MinuteSchool499views
04:56Hypothalamic Pituitary Thyroid Axis (regulation, TRH, TSH, thyroid hormones T3 and T4)Armando Hasudungan585views
04:50Parathyroid Glands, and Parathyroid hormone (PTH or Parathormone).Medicosis Perfectionalis527views
03:38Endocrine System Review | Pituitary, Thyroid, Parathyroid, Adrenal, Pancreas, Gonads | Biology 🧫Medicosis Perfectionalis362views
01:56Physiology Lecture: Hypothalamus Control of Posterior Pituitary Gland - Explained in 2 Minutes5MinuteSchool312views
04:54Endocrine organs/glands & hormone overview - Med-Surg (2020 Edition) - Endocrine | - @Level Up RnLevel Up RN381views
02:45Endocrine System, Part 1 - Glands & Hormones: Crash Course Anatomy & Physiology #23CrashCourse1611views
03:20Homeostasis, Hormones and Feedback ControlNational Center for Case Study Teaching in Science354views
Multiple ChoiceThe endocrine system relies on __________ that __________ all of the cells of the body. 761views
Multiple ChoiceA cell releases a cytokine, which binds to and acts on a neighboring cell. This represents an example of __________. 487views
Multiple ChoiceWhich of the following examples is a true statement about the differences between hormones and neurotransmitters? 1681views
Multiple ChoiceWhich is an accurate statement regarding the difference between steroid and nonsteroid hormones? 5016views3rank
Multiple ChoiceBecause most chemical signals are unable to pass through the plasma membrane, the cellular action they initiate results from __________. 612views
Multiple ChoiceWhat result would you expect following the binding of epinephrine to an α-type epinephrine receptor? 463views
Multiple ChoiceWhich of the following hormones is thought to act at the cellular level by inducing a change in gene expression? 687views
Multiple ChoiceWhich of the following examples is a role of the local regulator nitric oxide (NO)? 503views
Multiple ChoiceIbuprofen is known for its pain-relieving and anti-inflammatory properties because it inhibits the synthesis of __________. 497views1rank
Multiple ChoiceWhich of the following conditions in a silkworm moth would result in metamorphosis from pupa to adult? 435views
Multiple ChoiceIn the winter, the __________ of vertebrates is apt to produce __________ than in summer months. 286views
Multiple ChoiceAnabolic steroids, sometimes taken illegally by athletes and bodybuilders, are chemically related to natural __________ produced in the __________. 335views
Multiple ChoiceWhich of the following is a problem with the long-term use of glucocorticoids, such as cortisone, to treat inflammation? 279views
Multiple ChoiceWhich of the following statements about the catecholamines secreted by the adrenal medulla is correct? 424views
Multiple ChoiceThe mammary glands of a pregnant female will begin to produce milk in response to changes in the level of which of the following hormones? 316views1rank
Multiple ChoiceThe major tropic action of growth hormone is to signal the __________ to release __________. 645views
Multiple ChoiceHyperthyroidism, typically characterized by a high metabolic rate and high blood pressure, might be expected when __________. 474views2rank
Multiple ChoiceWhich of the following endocrine organs only stores hormones produced by the hypothalamus? 603views
Multiple ChoiceAs a young girl, Maria suffered a head injury that damaged her pituitary. An injury to the pituitary is particularly serious because of all the functions controlled by this gland. As Maria got older, she and her doctors found that all of the following except her __________ were affected. 538views
Multiple ChoiceA doctor might give an expectant mother __________ to stimulate uterine contractions and induce labor. 374views
Multiple ChoiceHow does the hypothalamus control the secretion of growth hormone (GH) from the anterior pituitary? 1822views
Multiple ChoiceWhich of the following is a neurohormone secreted by the posterior pituitary? 561views
Multiple ChoiceFollicle-stimulating hormone (FSH) and luteinizing hormone (LH) are tropic hormones that are also known as __________. 630views
Multiple ChoiceWhich of the following hormones specifically act(s) to trigger secretion of hormones by another endocrine gland? 669views
Textbook QuestionWhich statement is accurate? (A) Hormones that differ in effect reach their target cells by different routes through the body. (B) Pairs of hormones that have the same effect are said to have antagonistic functions. (C) Hormones are often regulated through feedback loops. (D) Hormones of the same chemical class usually have the same function1006viewsHas a video solution.
Textbook QuestionWhich hormone is correctly paired with its action? (A) oxytocin—stimulates uterine contractions during childbirth (B) thyroxine—inhibits metabolic processes (C) ACTH—inhibits the release of glucocorticoids by the adrenal cortex (D) melatonin—raises blood calcium level1349viewsHas a video solution.
Textbook QuestionWhich of the following is not an accurate statement? a. Hormones are chemical messengers that travel to target cells through the circulatory system. b. Hormones often regulate homeostasis through antagonistic functions. c. Hormones of the same chemical class usually have the same function. d. Hormones are often regulated through feedback loops.1312viewsHas a video solution.
Textbook QuestionComplete this map, which presents some major concepts from this chapter. 287viewsHas a video solution.
Textbook QuestionHow do steroid hormones differ from polypeptide hormones and most amino-acid-derived hormones? a. Steroid hormones are lipid soluble and cross plasma membranes readily. b. Polypeptide and amino-acid-derived hormones are longer lived in the bloodstream and thus exert greater signal amplification. c. Polypeptide hormones are the most structurally complex and induce permanent changes in target cells. d. Only steroid hormones bind to receptors in the plasma membrane.268viewsHas a video solution.
Textbook QuestionThe hypothalamus a. synthesizes all of the hormones produced by the pituitary gland. b. influences the function of only one lobe of the pituitary gland. c. produces only inhibitory hormones. d. regulates both reproduction and body temperature.849viewsHas a video solution.
Textbook QuestionWhich correctly matches a hormone to the gland from which it is produced and to its effect on target cells? a. thyroid hormone: anterior pituitary, regulates metabolism b. prolactin: anterior pituitary, raises blood calcium levels c. androgens: thyroid, promotes male characteristics d. None of the choices are correct.853viewsHas a video solution.
Textbook QuestionWhat is a hormone-response element? a. a receptor for a steroid hormone b. a receptor for a polypeptide hormone c. a segment of DNA where a hormone–receptor complex binds d. an enzyme that is activated in response to hormone binding and produces a second messenger619viewsHas a video solution.
Textbook QuestionGrowth factors are local regulators that a. are produced by the anterior pituitary. b. are modified fatty acids that stimulate bone and cartilage growth. c. are found on the surface of cancer cells and stimulate abnormal cell division. d. bind to cell-surface receptors and stimulate growth and development of target cells.790viewsHas a video solution.
Textbook QuestionThe body is able to maintain a relatively constant level of thyroid hormone in the blood because a. thyroid hormone stimulates the pituitary to secrete thyroid-stimulating hormone (TSH). b. thyroid hormone inhibits the secretion of TSH-releasing hormone (TRH) from the hypothalamus. c. TRH inhibits the secretion of thyroid hormone by the thyroid gland. d. thyroid hormone stimulates the hypothalamus to secrete TRH.600viewsHas a video solution.
Textbook QuestionWhich of the following assertions regarding hormones is correct? Select True or False for each statement. T/F Growth and metamorphosis are controlled by hormones. T/F Cortisol stimulates the production of ACTH. T/F Hormones produced by the hypothalamus are considered neurohormones. T/F Hormonal changes during puberty and pregnancy are forms of endocrine disruption.281viewsHas a video solution.
Textbook QuestionWhich hormone is incorrectly paired with its action? a. oxytocin—stimulates uterine contractions during childbirth b. thyroxine—inhibits metabolic processes c. ACTH—stimulates the release of glucocorticoids by the adrenal cortex d. melatonin—affects biological rhythms and seasonal reproduction1432viewsHas a video solution.
Textbook QuestionExplain how the hypothalamus controls body functions through its action on the pituitary gland. How does control of the anterior and posterior pituitary differ?553viewsHas a video solution.
Textbook QuestionTrue or False: In hormone systems, negative feedback occurs when the presence of a hormone inhibits release of the hormone.1061viewsHas a video solution.
Textbook QuestionWhat do steroid and peptide hormones typically have in common? a. their solubility in cell membranes b. their requirement for travel through the bloodstream c. the location of their receptors d. their reliance on signal transduction in the cell1402views1rankHas a video solution.
Textbook QuestionList three ways endocrine glands are stimulated to release hormones.771viewsHas a video solution.
Textbook QuestionCompare and contrast the modes of action of lipid-soluble and water-soluble hormones.1293viewsHas a video solution.
Textbook QuestionWhich of the following is the most likely explanation for hypothyroidism in a patient whose iodine level is normal? a. greater production of T3 than of T4 b. hyposecretion of TSH c. hypersecretion of MSH d. a decrease in the thyroid secretion of calcitonin842views1rankHas a video solution.
Textbook QuestionIn a glucose tolerance test, periodic measurements of blood glucose level are taken after a person drinks a glucose-rich solution. Using the hypothetical graph below, compare and contrast the results of the test for the diabetic and the healthy individual. 479viewsHas a video solution.
Textbook QuestionWhy is the observation that one hormone may bind to more than one type of receptor important?346viewsHas a video solution.
Textbook QuestionThe relationship between the insect hormones ecdysteroid and PTTH is an example of a. an interaction of the endocrine and nervous systems. b. homeostasis achieved by positive feedback. c. homeostasis maintained by antagonistic hormones. d. competitive inhibition of a hormone receptor.474viewsHas a video solution.
Textbook QuestionIf a person has a pituitary tumor that is oversecreting TSH, would this person be likely to have goiter as a symptom? Explain.261viewsHas a video solution.
Textbook QuestionCompare and contrast the structure and function of the anterior and posterior pituitary glands.522viewsHas a video solution.
Textbook QuestionDRAW IT In mammals, milk production by mammary glands is controlled by prolactin and prolactin-releasing hormone. Draw a simple sketch of this pathway, including glands, tissues, hormones, routes for hormone movement, and effects.1122viewsHas a video solution.
Textbook QuestionWhich two of the hormones listed below act upon the body with similar functions? Explain. a. glucagon b. oxytocin c. glucocorticoids d. ADH615viewsHas a video solution.
Textbook QuestionDesign a study to test the hypothesis that the symptoms of jet lag are caused by disruption of normal daily cortisol rhythms.293viewsHas a video solution.
Textbook QuestionA strain of mice remains healthy as long as they are fed regularly. After they eat, their blood glucose level rises slightly and then declines to a homeostatic level. However, when these mice fast or exercise, their blood glucose drops dangerously. Which hypothesis best explains their problem? (Explain your choice.) a. The mice have insulin-dependent diabetes. b. The mice lack insulin receptors on their cells. c. The mice lack glucagon receptors on their cells. d. The mice cannot synthesize glycogen from glucose.278viewsHas a video solution.
Textbook QuestionSuppose that during a detailed anatomical study of a marine invertebrate, you found a small, previously undescribed structure. How would you test the hypothesis that the structure is a gland that releases one or more hormones?254viewsHas a video solution.
Textbook QuestionSCIENTIFIC THINKING The results of Tyrone Hayes's experiments (Module 26.3) were published in a top peer-reviewed journal, yet the validity of his experiments has since been challenged. Using external sources, find out who has challenged the results.339viewsHas a video solution.
Textbook QuestionScientists set out to test the hypothesis that the herbicide atrazine is an endocrine disruptor that feminizes male amphibians. They treated male amphibians with atrazine and then compared their circulating testosterone concentration with those of males and females that were not treated with atrazine (controls). The results are shown here (* signifies P<0.05). Was the hypothesis supported? Why or why not? 300viewsHas a video solution.
Textbook QuestionEcotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone? Corticosterone is a(n): a. neurohormone b. steroid hormone c. amino-acid-derived hormone d. polypeptide hormone238viewsHas a video solution.
Textbook QuestionEcotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone? In what part(s) of a target cell would you expect to find corticosterone receptors?204viewsHas a video solution.
Textbook QuestionEcotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone? If penguins in a colony are habituated to the presence of tourists, how would their corticosterone response to being visited by tourists compare to that of penguins in a colony not previously exposed to tourists?251viewsHas a video solution.
Textbook QuestionEcotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone? Scientists tested the hypothesis that penguins habituated to tourists have a blunted stress response overall. They examined the corticosterone response of habituated and non-habituated penguins to another stressor—that of being captured and restrained for 30 minutes. They found that both habituated and non-habituated penguins secreted corticosterone in response to being captured and restrained, but that the level of corticosterone after 30 minutes differed between the groups. The results are shown here (* means P<0.05). Was the hypothesis supported? Explain. 267viewsHas a video solution.
Textbook QuestionEcotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone? In response to a visit by tourists, which penguins—habituated or non-habituated—would show a greater change in expression of genes for liver enzymes involved in converting amino acids to glucose? Explain.228viewsHas a video solution.
Textbook QuestionEcotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone? Suggest at least two distinct physiological mechanisms that could be responsible for the difference in corticosterone response to a stressor in habituated and non-habituated penguins.219viewsHas a video solution.