SEELEY'S ANATOMY+PHYSIOLOGY
12th Edition
ISBN: 9781260172195
Author: VanPutte
Publisher: RENT MCG
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Textbook Question
Chapter 1, Problem 10RAC
Which of these statements concerning positive feedback is correct? a. Positive-feedback responses maintain homeostasis
b. Positive-feedback responses occur continuously in healthy individuals.
c. Birth is an example of a normally occurring positive-feedback mechanism.
d. When cardiac muscle receives an inadequate supply of blood, positive-feedback mechanisms increase blood flow lo he heart.
e. Medical therapy seeks to overcome illness by aiding positive-feedback mechanisms.
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Which of these statements about homeostasis is true? a.The internal environment is maintained absolutely constant. b.Negative feedback mechanisms act to correct deviations from a normal range within the internal environment. c.Homeostasis is maintained by turning effectors on and off. d.All of these are true.
In a negative feedback mechanism,a. the output cancels the input.b. there is a fluctuation above and below the average.c. there is self-regulation.d. a regulatory center communicates with other body parts.e. All of these are correct.
Which of the following physiologlcal responses is an example of positive feedback?
. The body's production of red blood cells, which transport oxygen from the lungs to other organs,
is stimulated by low concentrations of oxygen.
b. A high concentration of glucose in the blood causes deeper, more rapid breathing, which expels
carbon dioxide.
C. Pressure of the baby's head near the opening of the uterus stimulates uterine contractions
which cause greater pressure against the uterine opening.
d. Heightened body temperature induces sweating which disposes of metabolic heat and cools the
body.
Chapter 1 Solutions
SEELEY'S ANATOMY+PHYSIOLOGY
Ch. 1.1 - How does the study of anatomy differ from the...Ch. 1.1 - What is studied in gross anatomy? In surface...Ch. 1.1 - Prob. 3AYPCh. 1.1 - Why are anatomy and physiology normally studied...Ch. 1.2 - From simplest to complex, list and define the...Ch. 1.2 - What are the four basic types of tissues?Ch. 1.2 - Referring to figure 1.3, which two organ systems...Ch. 1.3 - What are the six characteristics of living things?...Ch. 1.3 - How does differentiation differ from...Ch. 1.4 - Prob. 10AYP
Ch. 1.5 - How do variables, set points, and normal ranges...Ch. 1.5 - Prob. 12AYPCh. 1.5 - Prob. 13AYPCh. 1.5 - Give an example of how a negative-feedback...Ch. 1.5 - Prob. 15AYPCh. 1.6 - What is anatomical position in humans? Why is it...Ch. 1.6 - What two directional terms indicate “toward the...Ch. 1.6 - What two directional terms indicate “the bock” in...Ch. 1.6 - Define the following directional terms and give...Ch. 1.6 - What makes up the central region of the body?Ch. 1.6 - What is the difference between the arm and the...Ch. 1.6 - What are the anatomical terms for the following...Ch. 1.6 - In what quadrant would the majority of the stomach...Ch. 1.6 - List and describe the three planes of the body.Ch. 1.6 - In what three ways can you cut an organ?Ch. 1.6 - What structure separates the thoracic cavity from...Ch. 1.6 - What structure divides the thoracic cavity into...Ch. 1.6 - What is a serous membrane and its function?...Ch. 1.6 - Prob. 29AYPCh. 1.6 - What are mesenteries? Explain their function.Ch. 1.6 - What are retroperitoneal organs? List five...Ch. 1 - Physiology a. deals with the processes or...Ch. 1 - The following are organizational levels for...Ch. 1 - For questions 3-7, match each organ system with...Ch. 1 - For questions 3-7, match each organ system with...Ch. 1 - For questions 3-7, match each organ system with...Ch. 1 - For questions 3-7, match each organ system with...Ch. 1 - For questions 3-7, match each organ system with...Ch. 1 - The characteristic of life that is defined as “all...Ch. 1 - The following events are part of a...Ch. 1 - Which of these statements concerning positive...Ch. 1 - A term that means nearer the attached end of a...Ch. 1 - Which of these directional terms are paired most...Ch. 1 - The part of the upper limb between the elbow and...Ch. 1 - A patient with appendicitis usually has pain in...Ch. 1 - A plane that divides the body into anterior and...Ch. 1 - The lungs are Part of the mediastinum. Surrounded...Ch. 1 - Given the following organ and cavity combinations:...Ch. 1 - Which if the following membrane combination are...Ch. 1 - Which of the following organs are not...Ch. 1 - Prob. 1CTCh. 1 - A male has lost blood as a result of a gunshot...Ch. 1 - Provide the correct directional term for the...Ch. 1 - During pregnancy, which of the mother’s body...Ch. 1 - A woman falls while skiing and is accidentally...
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- Which of the following is true of positive feedback? a. The change is opposite that of negative feedback b. The effector turns off the response c. The change is amplified What is the difference between the answers a & b?arrow_forwardwhich of the following situations illustrates that a homeostatic mechanism is not operating properly? a. acute high blood pressure b. normalized blood glucose levels c. dailt fluid intake equals dailty fluid output d. all of these illustrate homestatic mechanisms operating properlyarrow_forwardSweating is an example of variable. It is also an example of negative feedback mechanism. a. Both statements are true b. Both statements are false c. First is true, Second is false d. First is false, Second is truearrow_forward
- Which of these homeostatic mechanisms in the body are examplesof positive feedback, and which are examples of negative feedback?Why?a. The adrenal glands produce epinephrine in response to a hormone produced by the pituitary gland in times of stress; the pituitary gland senses the epinephrine in the blood and stopsproducing the hormone.b. As the bladder fills with urine, pressure sensors send messagesto the brain with increasing frequency, signaling that the bladdermust be emptied. The more the bladder fills, the more messagesare sent.c. When you drink an excess of water, specialized cells in yourbrain, as well as stretch receptors in your heart, detect theincrease in blood volume. Both signals are transmitted to thekidneys, which increase the production of urine.arrow_forwardGiven these characteristics:Matrix composed almost entirely of extracellular collagen fibers. It is able to withstand great pulling forces. Which of the tissue is described? A. Adipose. B.Cartilage. C.Bone. D. Dense connective tissue. E.Loose connective tissue 2. According to Frank-Starling law of the heart, A.increased preload causes increased cardiac output. B.increased afterload causes increased cardiac output. C.decreased preload causes increased afterload. D.afterload influences cardiac output more than preload. E.cardiac output is not influenced by preload.arrow_forwardIn negative feedback,a. a change causes responses that counteract the change.b. a response to a change damages the body.c. a change produces a response that enhances the change.d. a response to a change permanently alters the body.arrow_forward
- Which of the following is incorrect?a. Equilibrium requires a constant input of energy.b. Positive feedback is less common in nature than negative feedback.c. Homeostasis does not imply that a given variable is unchanging.d. Fever is an example of resetting a set point.e. Efferent pathways carry information away from the integrating center of a reflex arc.arrow_forwardMark the following statements as true or false. If a statement is false, correct it to make a true statement. a. Structure and function are closely related at the organ level only. b. Homeostasis is the condition of having a dynamic equilibrium of the internal environment. c. Positive feedback loops are triggered by a deviation from a homeostatic set point and are shut down when conditions return to the set point. d. The effects of negative feedback loops are amplified to create an escalating response. e. Cell-cell communication is required to coordinate the activities of the whole bodyarrow_forwardThe body system responsible for structural support andmovement is the ________.a. cardiovascular systemb. endocrine systemc. muscular systemd. skeletal systemarrow_forward
- Which statements describe how systems interact to produce the fight-or-flight response?Select the two correct answers. A The digestive system interacts with the excretory system, supplying hormones to slow the production of urine. B The endocrine system floods the circulatory system with hormones that affect several other body systems. C The endocrine system supplies the lungs with insulin, allowing increased absorption of oxygen. D The digestive system creates hormones that are sent to the muscular system, resulting in increased blood flow to muscles. E The muscular system sends receptors to the circulatory system to increase blood pressure and heart rate. F The circulatory system experiences a change in blood flow, which allows the muscular system to obtain additional glucose.arrow_forwardWhich of the following are examples of maintaining homeostasis (more than one answer may be correct)? a. You develop diarrhea in response to contracting norovirus b. Sweating due to eating spicy food c. Kidneys removing excess fluid through urine d. Insulin is released in response to high blood sugar, causing cells to use more sugararrow_forwardIn physiology positive feedback ______. A is beneficial whereas negative feedback is harmful B is used frequently as it returns the body to homeostatic conditions C rushes infrequent events such as childbirth and blood clotting to completion D increases body temperature whereas negative feedback always lowers itarrow_forward
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