Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Textbook Question
Chapter 17, Problem 25RQ
What cells secrete melatonin?
- melanocytes
- pinealocytes
- suprachiasmatic nucleus cells
- retinal cells
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Students have asked these similar questions
The human sleep-wake cycle is regulated by melatonin. The synthesis of melatonin is regulated by light exposure (Figure 1). The human body typically develops a sleep-wake rhythm that does not respond quickly to change. Long-term exposure to extended periods of bright light after sunset is most likely to affect a person in which of the following ways?
a) Melatonin synthesis will be increased, and the person will quickly fall asleep.
b) Melatonin synthesis will be inhibited, and the person will have difficulty sleeping.
c) Melatonin synthesis will be inhibited, and the person will quickly fall asleep.
d) Melatonin synthesis will be increased, and the entire sleep-wake cycle will be shifted by several hours.
Some people with onset insomnia are told by their doctors to wear sunglasses at night before going to bed. If effective, what would be the likely mechanism behind this?
The retinohypothalamic tract (RHT) signaling to the pineal gland to start the production of melatonin
A signal to your tuberomammillary nucleus to stop producing histamine
This would trigger the lateral hypothalamus to decrease orexin production
You blink more when you have sunglasses on, which initiates NREM1
Some Hormones are derived from tyrosine, example --------------------.
ADH
steroids
Melatonin
Progesterone
None of the above
Chapter 17 Solutions
Anatomy & Physiology
Ch. 17 - Visit this link...Ch. 17 - Visit this link...Ch. 17 - Visit this link...Ch. 17 - Visit this link...Ch. 17 - Visit this link...Ch. 17 - Endocrine glands ________. secrete hormones that...Ch. 17 - Chemical signaling that affects neighboring cells...Ch. 17 - A newly developed pesticide has been observed to...Ch. 17 - A small molecule binds to a G protein, preventing...Ch. 17 - A student is in a car accident, and although not...
Ch. 17 - The hypothalamus is functionally and anatomically...Ch. 17 - Which of the following is an anterior pituitary...Ch. 17 - How many hormones are produced by the posterior...Ch. 17 - Which of the following hormones contributes to the...Ch. 17 - Which of the following statements about the...Ch. 17 - The secretion of thyroid hormones is controlled by...Ch. 17 - The development of a goiter indicates that...Ch. 17 - Iodide ions cross from the bloodstream into...Ch. 17 - When blood calcium levels are low, PTH stimulates...Ch. 17 - Which of the following can result from...Ch. 17 - The adrenal glands are attached superiorly to...Ch. 17 - What secretory cell type is found in the adrenal...Ch. 17 - Cushings disease is a disorder caused by ________....Ch. 17 - Which of the following responses s not part of the...Ch. 17 - What cells secrete melatonin? melanocytes...Ch. 17 - The production of melatonin is inhibited by...Ch. 17 - The gonads produce what class of hormones? amine...Ch. 17 - The production of FSH by the anterior pituitary is...Ch. 17 - The function of the placental hormone human...Ch. 17 - If an autoimmune disorder targets the alpha cells,...Ch. 17 - Which of the following statements about insulin is...Ch. 17 - The walls of the atria produce which hoimone?...Ch. 17 - The end result of the RAAS is to ________. reduce...Ch. 17 - Athletes may take synthetic EPO to boost their...Ch. 17 - Hormones produced by the thymus play a role in the...Ch. 17 - The anterior pituitary gland develops from which...Ch. 17 - In the elderly, decreased thyroid function causes...Ch. 17 - Describe several main differences in the...Ch. 17 - Compare and contrast endocrine and exocrine...Ch. 17 - True or false: Neurotransmitters are a special...Ch. 17 - Compare and contrast the signaling events involved...Ch. 17 - Describe the mechanism of hormone response...Ch. 17 - Compare and contrast the anatomical relationship...Ch. 17 - Name the target tissues for prolactin.Ch. 17 - Explain why maternal iodine deficiency might lead...Ch. 17 - Define hyperthyroidism and explain why one of its...Ch. 17 - Describe the role of negative feedback in the...Ch. 17 - Explain why someone with a parathyroid gland tumor...Ch. 17 - What are the three regions of the adrenal cortex...Ch. 17 - If innervation to the adrenal medulla were...Ch. 17 - Compare and contrast the short-term and long-term...Ch. 17 - Seasonal affective disorder (SAD) is a mood...Ch. 17 - Retinitis pigmentosa (RP) is a disease that causes...Ch. 17 - Compare and contrast the role of estrogens and...Ch. 17 - Describe the role of placental secretion of...Ch. 17 - What would be the physiological consequence of a...Ch. 17 - Why is foot care extremely important for people...Ch. 17 - Summarize the role of GI tract hormones following...Ch. 17 - Compare and contrast the thymus gland in infancy...Ch. 17 - Distinguish between the effects of menopause and...
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- Are you more of a “morning person” or a “night person”? Can you think of any way that variations in melatonin secretion could account for how different people feel about, for example, getting up early in the morning?arrow_forwardTRH stimulates the secretion of what hormone? Answers to choose: Prolactin, or Vasopressin, or Growth hormone, or TSH? no references, just homework.arrow_forwardwhat is melatonin? how and when is melatonin released? what happens when melatonin is released? can your brain stop producing melatonin if you take it? why is melatonin used?arrow_forward
- What cells secrete melatonin?a. melanocytesb. pinealocytesc. suprachiasmatic nucleus cellsd. retinal cellsarrow_forwardWhich hormone is released from the posterior pituitary gland? Oxytocin Prolactin Growth hormone Luteinizing hormonearrow_forwardWhere are oxytocin and vasopressin synthesized? hippocampus anterior pituitary hypothalamus posterior pituitaryarrow_forward
- Match the hormones to their major sites of synthesis. androgens cortisol Capsule aldosterone epinephrine Zona estrogens vitamin D3 glomerulosa prostaglandin dopamine FSH melatonin Zona fasciculata Cortex Zona reticularis Medulla Adrenal medulla,arrow_forwardIf you travel across several time zones to the east and want to use melatonin to help reset your circadian rhythm, at what time of day should you take it? What if you travel west?arrow_forwardThere are large endocrinocytes in the wall of the follicles and in the interfollicular layers of the connective tissue on the thyroid gland. The secretory granules of endocrinocytes are osmiofilic and argyphilic. Name these cells. Paratyrocytes. Calcitoninocytes. O Pituitary Pinealocytes. O Tyrocytes.arrow_forward
- Which of the following hormones is secreted by the posterior pituitary gland? Group of answer choices Melatonin GH ACTH ADH TSH no references, just homework.arrow_forwardWhich of the following has the broadest range of target organs (i.e can reach many different body regions) ? progesterone growth hormone follicle stimulating hormone prolactin releasing hormonearrow_forwardPancreas Gland Structure: Location: Thymus Gland Structure: Location: Pineal Gland Structure: Location:arrow_forward
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