Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 30, Problem 3SQ
Summary Introduction
Concept introduction: Plant hormones or phytohormones are the chemical molecules produced by plant tissues in extremely low concentrations for regulating many cellular processes. These hormones are very essential for plants as they decide many different attributes necessary for their growth. The major characters determined by plant hormones are flowering, shedding of leaves, shoot and root elongation, ripening of fruits and abscission.
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Match the hormone with the observation. ___ ethylene a. Your cabbage plants form ___ cytokinin elongated flowering stalks. ___ auxin b. The potted plant in your room ___ gibberellin is leaning toward the window. ___ ABA c. The last of your apples is getting ___ nitric oxide really mushy. d. The seeds of your roommate’s marijuana plant do not germinate no matter what he does to them. e. Lateral buds are sprouting. f. Your lettuce plants develop brown spots on their leaves.
what happens to a water souble hormone after it binds to a receptor on the target cell? select all that apply
A. the hormone unbinds the receptor or pops back off
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Chapter 30 Solutions
Biology: The Unity and Diversity of Life
Ch. 30 - Volatile Secondary Metabolites in Plant Stress...Ch. 30 - Volatile Secondary Metabolites in Plant Stress...Ch. 30 - Volatile Secondary Metabolites in Plant Stress...Ch. 30 - Prob. 4DAACh. 30 - Prob. 1SQCh. 30 - Prob. 2SQCh. 30 - Prob. 3SQCh. 30 - _______ is the hormone in most rooting compounds....Ch. 30 - Prob. 5SQCh. 30 - Prob. 6SQ
Ch. 30 - Prob. 7SQCh. 30 - Ethylene differs from other hormones in that it...Ch. 30 - Prob. 9SQCh. 30 - Prob. 10SQCh. 30 - Prob. 11SQCh. 30 - Prob. 12SQCh. 30 - Match the hormone with the description. _____...Ch. 30 - Prob. 14SQCh. 30 - Prob. 15SQCh. 30 - Professional gardeners often soak seeds in...Ch. 30 - Photosynthesis sustains plant growth, and inputs...Ch. 30 - Prob. 3CTCh. 30 - Cattle in industrial dairy farms are typically...Ch. 30 - The oat coleoptiles on the left have been...
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- Steroid hormones a. can diffuse through the membrane without a carrier. b. have a direct effect on gene expression. c. bind to membrane receptors. d. Both a and b are correct.arrow_forwardA ______ requires the use of a second messenger system to enter a cell. a. steroid hormone c. pheromone b. peptide hormone d. All of these are correctarrow_forwardWhen a catecholamine or peptide hormone binds to receptors on the surface of a cell, A. The hormone is transported to the nucleus where it alters the activity of dna. B. The cell membrane becomes less permeable. C. The cell becomes inactive. D. A second messenger appears in the cytoplasm.arrow_forward
- 23. The endocrine system uses hormones that are _______________ traveling via blood or lymph. a. local acting signals b. same cell signals c. neighboring cell signals d. short distance signals e. long distance signalsarrow_forwardWhich of the following statements is truc a. Neurotransmitters must bind to a receptor to exert an action on a cell but hormones do not have to bind to a receptor to exert an action b. The nervous system effects are longer lasting than the endocrine system c. The nervous system effects are faster to respond than the endocrine system d. The nervous system releases neurotransmitters into the bloodstream similar to how the endocrine system releases hormones into the bloodstreamarrow_forwardA hormone differs from a neurotransmitter in thata. hormones act extracellularly, whereas neurotransmitters act withinthe cell that synthesized them.b. hormones are released only by neurons, whereas neurotransmittersare released by many different types of cells.c. hormones cause only fast responses (seconds or less) to stimuli,whereas neurotransmitters cause slow responses (minutes to hours)to stimuli.d. hormones affect only epithelial cells, whereas neurotransmittersaffect only muscle cells.e. hormones are released into the bloodstream and can activate manycells in many parts of the body, whereas neurotransmitters arereleased by neurons and affect adjacent cells.arrow_forward
- Which one of the following hormones does not have intracellular receptors? a. Estrogens b. Cortisol c. Insulin d. Epinephrine e. T3 Gs proteins serve as transducers in the action of: a. Testosterone b. PRL c. GH d. TSHarrow_forward1. Protein hormones:A. Cuases protein synthesis in the cellB. ccan cuase the formation of cAMPC. Have hormone receptors in the nucleus of the cell D. Both a and c above.2. Steroid hormones have hormone receptors in the:A. Nucleus of the cellB. Cytoplasm of the cellC. Cell membrane of the cellD. Both a and c above3. The parathyroid hormone:A. Has the opposite effect of calcitoninB. is made in the Thyroid glandC. Causes a decrease in blood concentration of calciumD. All of the Abovearrow_forwardConsider the following: Hormone X is released by Secretory Cell A and binds to its receptor on Target Cell 1. In response to this binding, Target Cell 1 releases Hormone Y. Based on the information above, identify whether the following statement is true or false: Hormone X is considered a tropic hormone. a. True b. Falsearrow_forward
- A tropic hormone is one whose function is to Answers: A.stimulate growth and development. B. stimulate endocrine tissue to secrete hormones. c. stimulate the central nervous system. D. trigger cellular development.arrow_forwardWhich of these is not a means by which hormones are eliminatedfrom the circulatory system?a. excreted into urine or bileb. bound to binding proteinsc. enzymatically degraded in the blood (metabolism)d. actively transported into cellse. conjugated with sulfate or glucuronic acidarrow_forwardA small molecule binds to a G protein, preventing itsactivation. What direct effect will this have on signalingthat involves cAMP?a. The hormone will not be able to bind to thehormone receptor.b. Adenylyl cyclase will not be activated.c. Excessive quantities of cAMP will be produced.d. The phosphorylation cascade will be initiated.arrow_forward
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