CAMPBELL BIOLOGY MOD MASTERING (18 WEEK)
12th Edition
ISBN: 9780136920335
Author: Urry
Publisher: PEARSON
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Chapter 45, Problem 5TYU
Summary Introduction
Introduction:
Endocrine cells secrete hormones into the extracellular fluids, which are signaling molecules. The secreted hormones reach target cells through the bloodstream. Hormones bind only to specific cells based on the corresponding receptors and they act through chemical signals. They maintain homeostasis and regulate growth, development, blood pressure,
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Steroid hormones ...
a) ... transmits its effects mainly by binding to membrane receptors.
b) ... are water soluble.
c) ... conveys its effects mainly through so-called second messengers.
d) ... is transported in the blood by means of carrier protein.
1) Gross Anatomy and Basic Function of the Endocrine Glands
a)Both the endocrine and nervous systems are major regulating systems of the body; however, the nervous system has been compared to a text message, and the endocrine system to mailing a letter. Briefly explain this comparison.
b) Chemically, hormones belong chiefly to two molecular groups, the___ and the___
c) If hormones travel in the bloodstream, why don't all tissues respond to all hormones?
All of the following hormones are properly classified EXCEPT (use the table below for general characteristics)
(A) thyroxin-arachidonic acid
(B) thromboxanes-arachidonic acid derivatives
(C) estrogen-steroid (cholesterol based)
(D) growth hormone-small protein (< 200 amino acid)
(E) norepinephrine- amino acid derivative
Chapter 45 Solutions
CAMPBELL BIOLOGY MOD MASTERING (18 WEEK)
Ch. 45.1 - How do response mechanisms in target cells differ...Ch. 45.1 - What type of gland would you expect to secrete...Ch. 45.1 - WHAT IF? Predict what would happen if you...Ch. 45.2 - What are the roles of oxytocin and prolactin in...Ch. 45.2 - How do the two fused glands of the pituitary gland...Ch. 45.2 - WHAT IF? 2192 Propose an explanation for why...Ch. 45.2 - what if? Lab tests of two patients, each...Ch. 45.3 - If a hormone pathway produces a transient response...Ch. 45.3 - Prob. 2CCCh. 45.3 - Prob. 3CC
Ch. 45 - MAKE CONNECTIONS What forms of signaling activate...Ch. 45 - Which major endocrine organs described in Figure...Ch. 45 - Prob. 45.3CRCh. 45 - Prob. 1TYUCh. 45 - Prob. 2TYUCh. 45 - Growth factors are local regulators that (A) are...Ch. 45 - Prob. 4TYUCh. 45 - Prob. 5TYUCh. 45 - Which of the following is the most likely...Ch. 45 - The relationship between the insect hormones...Ch. 45 - DRAW IT In mammals, milk production by mammary...Ch. 45 - Prob. 9TYUCh. 45 - Prob. 10TYUCh. 45 - Level 3: Synthesis/Evaluation 11. WRITE ABOUT A...Ch. 45 - Prob. 12TYU
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- Virtually all of the protein or amino acid-based hormones exert their effects through an intracellular O a) ions O b) deactivators c) receptors O d) second messengers Ston sharing Hidearrow_forwardA steroid hormone approaches its target cell. Which of the following happens first? a)The hormone enters the nucleus. b)The hormone passes through the cell membrane. c)The hormone and its receptor bind to the cell's DNA. d) The hormone and its receptor enter the cell's nucleus.arrow_forwardWhich of the following is not a true statement? A.) steroid and thyroid hormone signaling would be impaired if the plasma level of carrier proteins is not optimal. B.) Steroid and thyroid hormone-receptor complexes form dimers when they bind to the hormone-response elements on DNA C.) Epinephrine uses the adenylate cyclase and the phospholipase C second messenger systems D.) signaling by a peptide hormone would be impaired if a second messenger system is not functional in the target cell E.) signaling by a steroid hormone would be hindered if the adenylated cyclase second messenger system is not functional in the target cell.arrow_forward
- Why is this wrong?arrow_forwardWhich of the following observations can be explained by the properties of hormone receptors? a) A certain tissue can react to more than one hormone b) A certain hormone affects only a specific tissue, not all tissues c) Some tissues react very quickly to a certain hormone, other tissues take many hours to react to the same hormonearrow_forwardThe 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.arrow_forward
- Answer this question asap quickly fast thanksarrow_forwardWhat's the key distinction between a hormone and a neurotransmitter?arrow_forwardList the hormones secreted by the following:(a) Hypothalamus (b) Pituitary (c) Thyroid (d) Parathyroid(e) Adrenal (f) Pancreas (g) Testis (h) Ovary (i) Thymus (j) Atrium (k) Kidney (l) G-I Tractarrow_forward
- Please answer both (A) Explain why all cells do not respond to all hormones. (B) Describe the differences between the hormone epinephrine and the neurotransmitter epinephrinearrow_forwardWhat general features make a chemical compound a hormone, and how do hormones achieve specificity for certain kinds of target cell?arrow_forward*** Which of the following statements about endocrine signalling hormones is TRUE? a) They are only soluble in lipids. b) In vertebrates, they are only transported through the blood circulatory system. c) They include a group of chemicals known as pheromones. d) Each hormone can react with only one specific receptor type. e) They are also involved in synaptic signalling.arrow_forward
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