Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN: 9781285866932
Author: Lauralee Sherwood
Publisher: Cengage Learning
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Question
Chapter 1, Problem 5TAHL
Summary Introduction
To analyze:
The widening and the narrowing of the blood vessels due to intensive exercising.
Introduction:
The body operates by many feedback signals, which come from the various parts of the body. These feedbacks can be either negative regulators (negative feedback) or positive regulator (positive feedback). The regulation of the temperature balance is an example of a negative regulator, as the heat increases in the body, it triggers a decrease in temperature and vice versa.
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Body temperature is homeostatically regulated around a set point. Given your knowledge of negative feedback and homeostatic control systems, predict whether narrowing or widening of the blood vessels of the skin will occur when a person exercises strenuously. (Hints: Muscle contraction generates heat. Narrowing of the vessels supplying an organ decreases blood flow through the organ, whereas vessel widening increases blood flow through the organ. The more warm blood flowing through the skin, the greater is the loss
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Chapter 1 Solutions
Human Physiology: From Cells to Systems (MindTap Course List)
Ch. 1.1 - Define physiology.Ch. 1.1 - The nutrient-absorbing intestinal cells have a...Ch. 1.2 - Prob. 1CYUCh. 1.2 - Prob. 2CYUCh. 1.2 - Prob. 3CYUCh. 1.3 - Distinguish among external environment, internal...Ch. 1.3 - Prob. 2CYUCh. 1.3 - Prob. 3CYUCh. 1.4 - Prob. 1CYUCh. 1.4 - Prob. 2CYU
Ch. 1.4 - Draw a row diagram showing the relationships among...Ch. 1 - Which of the following activities is not carried...Ch. 1 - Prob. 2RECh. 1 - Which of the following is not a type of connective...Ch. 1 - The term tissue can apply either to one of the...Ch. 1 - Cells in a multicellular organism have specialized...Ch. 1 - Cell specializations are usually a modification or...Ch. 1 - The four primary types of tissue are...Ch. 1 - Prob. 8RECh. 1 - Prob. 9RECh. 1 - _________ controls are inherent to an organ,...Ch. 1 - Prob. 11RECh. 1 - Compare physiology and anatomy.Ch. 1 - Prob. 2UCCh. 1 - Prob. 3UCCh. 1 - Prob. 4UCCh. 1 - What factors must be homeostatically maintained,...Ch. 1 - Prob. 6UCCh. 1 - Prob. 7UCCh. 1 - Prob. 1ACRCh. 1 - Prob. 1TAHLCh. 1 - Prob. 2TAHLCh. 1 - The hormone insulin enhances the transport of...Ch. 1 - Prob. 4TAHLCh. 1 - Prob. 5TAHL
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- Heat exchange with the environment depends on the surface area-to-volume ratio of the body. Assuming that the body shape of an animal is at least somewhat spherical, a considerable decrease in body size would the surface area-to-volume ratio, and the ability to exchange heat with the environment would A. increase; increase B. increase; stay about the same C. increase; decrease D. decrease; increase E. decrease; stay about the samearrow_forwardWhen we exercise in the cold, we will regulate body heat through all except... Vasodilation to extremities Vasoconstriction to extremities Increased epinephrine output Shiveringarrow_forwardFigure (2) below, shows the relations between all factors that should be at minimat amount of body regulation to achieve thermal equilibrium, towards establishing the physiological basis of comfort. in the same Figure, symbol (B) represents: Celius 20 25 700 600 130 300 100 100 00 70 AMBIENT TEMPERATUREF 100 110 Figure (2) ORadiation O Convection OMetabolism Evaporation STUK BOOYLOSssor GAINarrow_forward
- Which of the following responses is an effector activated by the hypothalamus when the body temperature is lower than the set point? skin blood vessels dilate skeletal muscles contract move to a warmer location or put on a sweater weat glands initiate sweatingarrow_forwardIn mammals, body temperature is controlled by a structure in the brain called the hypothalamus. The hypothalamus is able to sense even slight variations in body temperature. This structure is responsible for bodily responses that include thirst, the activation of sweat glands, and the dilation of blood vessels near the skin. Each of these mechanisms works to restore body temperature to a normal range.arrow_forwardThe feedback loop shown below is an example of negative feedback that uses the narrowing and widening of blood vessels in the skin to regulate body temperature. DIRECTIONS: Label the diagram using the words or phrases from the word bank. Then answer the questions that follow. body temperature falls body temperature rises normal body temperature vasoconstriction vasodilation Feedback: Feedback: Response: ACY MENT CHA RICH OF EATIO Response: EX Stimulus: Increase in Body Temperature Stimulus: Decrease in Body Temperaturearrow_forward
- Imagine you are sick and you have fever. Sensors on the skin and brain detect this and communicate with the temperature regulatory center in the brain which then sends out a command to the sweat glands of your body as a result of which you start sweating and in about 15 mins your body temperature comes back to normal for the time being. This this feedback loop, identify the following: sensors control center effector stimulus responsearrow_forwardHomeostasis is the ability of our body to maintain our normal internal environment. What are the ways that you can do to help your body in maintaining your normal temperature regulation, osmotic balance and glucose levels?arrow_forwardIn the negative feedback system for regulation of body temperature. Identify the following. 1. Stimulus 2. Receptor 3. Control Center 4. Effector 5. Responsearrow_forward
- If daytime body temperature of some ectotherms were measured, the values would be fairly constant. Provide an explanation for such observations, giving some possible mechanisms that might be involvedarrow_forwardDescribe the steps in the homeostatic feedback system activated to ensure normal body temperature is maintained when exposed to a hot external temperature (e.g., 42 degrees Celsius). Give typing answer with explanation and conclusionarrow_forwardWhich of the following responses is an effector activated by the hypothalamus when the body temperature is lower than the set point? Group of answer choices move to a warmer location or put on a sweater skeletal muscles contract sweat glands initiate sweating skin blood vessels dilatearrow_forward
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