Essentials of Human Anatomy & Physiology Plus MasteringA&P with eText -- Access Card Package (11th Edition)
11th Edition
ISBN: 9780321918758
Author: Elaine N. Marieb
Publisher: PEARSON
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Chapter 1, Problem 11SAE
Summary Introduction
To review:
The roles of the receptors, effectors, and control center in homeostasis.
Introduction:
The ability of the body of an organism to maintain the relatively stable internal conditions, in spite of being surrounded by the continuously altering environment is known as homeostasis. It is the state of dynamic equilibrium, in which the internal body conditions vary within a relatively narrow range.
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Students have asked these similar questions
Organismal homeostasis depends upon the presence of control systems. Give a physiological example of a negative feedback control system its positive feedback. Clearly describe the role(s) that each of the following elements plays in all control systems: such as controller, effector and receptor.
1) As a physiologist, which of the following terms should you immediately associate with negative feedback regulation?
Answer choices
Constancy
Relative constancy
Relative constancy in interstitial fluid
Relative constancy in intracellular fluid
2) Which of the following is true about physiological set-points?
Answer choices
They act as the integrating center in a negative feedback arc
They represent the internal environment
They are determined by the actions of the receptors and integrating centers
They are constant
They act as the effector in a negative feedback arc
3) What is the general purpose of negative feedback mechanisms?
Answer choice
a. to maintain a constant internal environment
b. To anticipate changes in the environment
c. To return a variable to its set-point
d. To bring about the rapid change of a variable
e. To detect changes in the external environment
Define homeostasis. What happens when homeostasis fails?
List the three basic components of a control system and give an example.
Describe the components of a reflex pathway. Contrast the response loop and the feedback loop.
Explain the relationship between a regulated physiological variable and its setpoint. Is the physiological variable
exactly at its setpoint?
Compare and contrast negative and positive feedback. Give a biological example of each.
Is the setpoint constant or can it change over time? If setpoints can change over time, what is this called?
Chapter 2:
Chapter 1 Solutions
Essentials of Human Anatomy & Physiology Plus MasteringA&P with eText -- Access Card Package (11th Edition)
Ch. 1 - Prob. 1MCCh. 1 - Which of the following is (are) involved in...Ch. 1 - More than one choice may apply. Which of the...Ch. 1 - More than one choice may apply. Using the terms...Ch. 1 - Match the proper anatomical term (column B) with...Ch. 1 - Prob. 6MCCh. 1 - A neurosurgeon orders a spinal tap for a patient....Ch. 1 - More than one choice may apply. Which of the...Ch. 1 - Define anatomy and physiology.Ch. 1 - List the 11 organ systems of the body, briefly...
Ch. 1 - Prob. 11SAECh. 1 - Explain the difference between positive and...Ch. 1 - Many body structures are symmetrical. Are the...Ch. 1 - Describe the locations that the following body...Ch. 1 - Which of the following organ systems-digestive,...Ch. 1 - A diagnostic radiographer told John that she was...Ch. 1 - 23. How is the concept of homeostasis (or its...Ch. 1 - Jennifer fell off her motorcycle and tore a nerve...Ch. 1 - Mr. Garica is behaving abnormally and doctors...Ch. 1 - 19. Parathyroid hormone (PTH) is secreted in...Ch. 1 - 20. Mr. Harvey, a computer programmer, has been...
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- The nervous system senses, interprets, and issues commands for responses to _________.arrow_forwardExplain the structure, main components and role of the nervous system in homeostasisarrow_forwardGive an example of a feedback mechanism in the human body. Explain your example briefly. Make sure to identify the type of feedback (negative or positive), the receptor, the control center and the effector.arrow_forward
- Which of the following is the correct definition of positive feedback? a The process by which the body neglects homeostasis. b A mechanism in which the body's response to a stimulis opposes the stimulus. c A mechanism whereby the body responds to a stimulus by acting to enhance the stimulus d The dynamic equilibrium maintained by an integrating center which causes an effector to respond to the stimulus received by the receptor.arrow_forwardList the three steps involved in intercellular communicationarrow_forwardSelect the statements that correctly describe positive feedback pathways. A sensor/receptor is required to monitor and limit levels. A sensor/receptor is unnecessary to monitor and limit levels.arrow_forward
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- A behavioral physiologist is studying the homeostatic control of blood pH. In a trial, a lizard runs on a treadmill for a set amount of time and the blood pH is measured. The blood pH drops as carbon dioxide is released into the bloodstream. Which component of the homeostatic feedback system is responsible for determining if the blood pH is far enough from normal that a response is necessary? Sensor Effector Assimilator Integratorarrow_forwardDescribe how blood sugar (e.g. glucose plasma concentration) is regulated with the hormones, insulin, and glucagon. For this feedback loop, identify the following components of the feedback loop: stimulus, receptor, control center, efferent pathway, effector, and response. Be comfortable with this feedback loop to be able to describe the effects of changing various components of the feedback loop.arrow_forwardThe autonomous nervous system regulates involuntary functions of the body and can be subdivided into the sympathetic and the parasympathetic nervous system. Both of these systems control the same group of body functions, but have opposite effects on the functions they regulate. The sympathetic nervous system prepares the body for intense physical activity like the fight-or-flight response. The parasympathetic nervous system has the opposite effect and relaxes the body and inhibits or slows many high energy functions. Which of the following involuntary effects in the body are brought about by the sympathetic nervous system during a fight-or- flight situation? i. Increased salivation ii. Increased digestion ii. Loss of bowel and bladder control iv. Body shivering Сrying Pupil dilation B. i, iv and v V. vi. A. i, ii and vi C. iii, iv and vi D. iii and varrow_forward
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