Homework Answers
1)
Steroid hormones are generally hydrophobic and can cross the outer membrane bilayer by nonmediated solution
nonmediates --> no energy required, sicne it is hydrophobic (won't mix with water)
2)
Peptide hormones are generally water soluble proteins/oligopeptide that would not easily cross the outer membrane of a cell...
this is due to the fact that the peptide will require energy, since it is not solbuel in fat (bilayer of membrane)
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Peptide hormones (such as insulin) must bind to receptors on the outside surfaces of their target...
What is the main difference between the activities of peptide hormones hormones? A. Peptide hormones do...
What is the main difference between the activities of peptide hormones hormones? A. Peptide hormones do not bind to receptors B. Peptide hormones bind to cell surface receptors C. Peptide hormones bind to stretches of RNA D. Steroid hormones bind to intracellular receptors but peptide hormone surface receptors E. Steroid hormones stimulate the release of second messengers but act directly by DNA Hypoglycemia inhibits secretion of which of the following hormones? A. growth hormone B. insulin C. epinephrine D. thyroid...
In the (area of the brain) neurosecretory cells produce two hormones, _and - These hormones are...
In the (area of the brain) neurosecretory cells produce two hormones, _and - These hormones are released into the blood from the - pituitary. The (area of the brain) also produces and hormones which regulate production of six hormones in the pituitary. These six hormones are Insulin Glucagon What cells produce it? What factors stimulate production? Target cells Body's response. Compare steroid and peptide hormones. Check which traits apply to each: Steroid Peptide Found in blood Found in cytoplasm of...
Classify each phrase on the left into the correct hormone category: water-soluble hormones, lipid-soluble hormones, or...
Classify each phrase on the left into the correct hormone
category: water-soluble hormones, lipid-soluble hormones, or both
types of hormones.
Cell response occurs within minutes Hormone travels in bloodstream to target cells Water-soluble hormones Lipid-soluble hormones Both types of hormones Activate a second messenger system Bind to receptors on target cell membrane Hormone is released by endocrine cells Bind to receptors on target cell membrane Peptide hormones Hormone enters target cell and binds to receptor inside cel Steroid hormones messenger...
Where on the target cells are receptors for peptide hormones usually found and why? Select one:...
Where on the target cells are receptors for peptide hormones usually found and why? Select one: A. in the cytoplasm, because (most) peptides act via second messengers B. in the nucleus, because (most) peptides affect the metabolism of the target cells C. on the cell membrane, because peptides cannot penetrate the cell membrane D. on the cell surface, because that is where the G-proteins are located
biochem Most hormones, such as peptide hormones, exert their effects by binding to cell surface receptors....
biochem
Most hormones, such as peptide hormones, exert their effects by binding to cell surface receptors. However, steroid hormones do so by binding to cytosolic receptors. How is this possible? Animals cannot synthesize linoleic acid (a precursor of arachidonic acid) and therefore must obtain this essential fatty acid from their diet. Explain why cultured animal cells can survive in the absence of linoleic acid.
Need help on these questions ? 1.) Steroid hormones trigger transcription of target genes by... ...
Need help on these questions ? 1.) Steroid hormones trigger transcription of target genes by... a. activating the release of Ca+2 ions that bind to and activate transcription factors. b. activating a kinase cascade that results in the activation of a transcription factor for a set of genes. c. binding directly to DNA and stimulating transcription. d. binding to nuclear receptors that act as transcription factors for specific genes. 2.) Which type of cell-surface receptor(s), when...
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1)...
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Hormones are usually transported through and affect only cells with 1) A) intercellular junctions cell junctions C) blood vessels... specific receptors B) ducts... .specific receptors D) blood vessels... cell junctions 2) Hormones regulate 2) A) reproduction only B) growth, only C) metabolism, only D) Growth, reproduction, and metabolism are regulated by hormones. 3) Steroid hormones 3) A) usually difuse through the plasma membrane into...
22-25 and Essay 22. The epidermis a) is classified as pseudostratified columnar epithelium b) allows uncontrolled...
22-25 and Essay
22. The epidermis a) is classified as pseudostratified columnar epithelium b) allows uncontrolled water loss from the body c) might include keratinocytes, melanocytes, Merkel cells and Langerhans cells d) All the above (a, b and c) are correct 23. Cartilage a) does not contain blood vessels b) is highly negatively charged because of sugars and sulfate groups attached to sugars e) absorbs large amounts of water which acts as a "shock absorber when pressure is applied to...
46 An electrocardiogram (ECG) provides information about B) the rhythm of heart contractions D) the speed...
46 An electrocardiogram (ECG) provides information about B) the rhythm of heart contractions D) the speed of blood flow through the blood vessels A) the pressure of blood in the heart chambers C) the amount of oxvgen in the blood as it leaves the heart 47 The velocity of blood flow is the lowest in capillaries because A) the capillaries have internal valves that slow the flow of blood B) the diastolic blood pressure is too low to deliver blood...
Immunocytochemistry is the method of visualization of proteins in cells with the use of antibody that...
Immunocytochemistry is the method of visualization of proteins in cells with the use of antibody that recognize specific molecules. Recently the visualization of these antibody-bound molecules is realized with the imaging of fluorescently-labeled antibodies against these receptors. Which type of microscopy would be used for this study? 0. Confocal microscopy O. Phase-contrast microscopy O. Differential interference contrast microscopy Electron phase-contrast microscopy You are working on a project that involves an imaging of rough endoplasmic reticulum shown here. What microscope was...
What is the main difference between the activities of peptide hormones hormones? A. Peptide hormones do not bind to receptors B. Peptide hormones bind to cell surface receptors C. Peptide hormones bind to stretches of RNA D. Steroid hormones bind to intracellular receptors but peptide hormone surface receptors E. Steroid hormones stimulate the release of second messengers but act directly by DNA Hypoglycemia inhibits secretion of which of the following hormones? A. growth hormone B. insulin C. epinephrine D. thyroid...
In the (area of the brain) neurosecretory cells produce two hormones, _and - These hormones are released into the blood from the - pituitary. The (area of the brain) also produces and hormones which regulate production of six hormones in the pituitary. These six hormones are Insulin Glucagon What cells produce it? What factors stimulate production? Target cells Body's response. Compare steroid and peptide hormones. Check which traits apply to each: Steroid Peptide Found in blood Found in cytoplasm of...
Classify each phrase on the left into the correct hormone
category: water-soluble hormones, lipid-soluble hormones, or both
types of hormones.
Cell response occurs within minutes Hormone travels in bloodstream to target cells Water-soluble hormones Lipid-soluble hormones Both types of hormones Activate a second messenger system Bind to receptors on target cell membrane Hormone is released by endocrine cells Bind to receptors on target cell membrane Peptide hormones Hormone enters target cell and binds to receptor inside cel Steroid hormones messenger...
biochem
Most hormones, such as peptide hormones, exert their effects by binding to cell surface receptors. However, steroid hormones do so by binding to cytosolic receptors. How is this possible? Animals cannot synthesize linoleic acid (a precursor of arachidonic acid) and therefore must obtain this essential fatty acid from their diet. Explain why cultured animal cells can survive in the absence of linoleic acid.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Hormones are usually transported through and affect only cells with 1) A) intercellular junctions cell junctions C) blood vessels... specific receptors B) ducts... .specific receptors D) blood vessels... cell junctions 2) Hormones regulate 2) A) reproduction only B) growth, only C) metabolism, only D) Growth, reproduction, and metabolism are regulated by hormones. 3) Steroid hormones 3) A) usually difuse through the plasma membrane into...
22-25 and Essay
22. The epidermis a) is classified as pseudostratified columnar epithelium b) allows uncontrolled water loss from the body c) might include keratinocytes, melanocytes, Merkel cells and Langerhans cells d) All the above (a, b and c) are correct 23. Cartilage a) does not contain blood vessels b) is highly negatively charged because of sugars and sulfate groups attached to sugars e) absorbs large amounts of water which acts as a "shock absorber when pressure is applied to...
46 An electrocardiogram (ECG) provides information about B) the rhythm of heart contractions D) the speed of blood flow through the blood vessels A) the pressure of blood in the heart chambers C) the amount of oxvgen in the blood as it leaves the heart 47 The velocity of blood flow is the lowest in capillaries because A) the capillaries have internal valves that slow the flow of blood B) the diastolic blood pressure is too low to deliver blood...
Immunocytochemistry is the method of visualization of proteins in cells with the use of antibody that recognize specific molecules. Recently the visualization of these antibody-bound molecules is realized with the imaging of fluorescently-labeled antibodies against these receptors. Which type of microscopy would be used for this study? 0. Confocal microscopy O. Phase-contrast microscopy O. Differential interference contrast microscopy Electron phase-contrast microscopy You are working on a project that involves an imaging of rough endoplasmic reticulum shown here. What microscope was...
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