which of the following statements are true about homeostasis? Select all that apply. a. The selective permeability of the cell membrane allows for thermoregulation. b. Homeostasis is an organism‘s way of maintaining constant and balanced internal processes. c. Ectotherms rely on environmental heat to maintain homeostasis. d. Homeostasis works by a system of positive feedback.

which of the following statements are true about homeostasis? Select all that apply. a. The selective permeability of the cell membrane allows for thermoregulation. b. Homeostasis is an organism‘s way of maintaining constant and balanced internal processes. c. Ectotherms rely on environmental heat to maintain homeostasis. d. Homeostasis works by a system of positive feedback.

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter1: Introduction To Physiology And Homeostasis

Section: Chapter Questions

Problem 3TAHL: The hormone insulin enhances the transport of glucose (sugar) from the blood into most body cells....

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which 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 properly
Which of the following is a way that the body determines how much of a certain chemical, protein, enzyme, or response is needed to maintain homeostasis? A. Resource limitation, B. Feedback inhibition, C. Kickback inhibition, D. Signal loop
Stratified squamous epithelial cells are effectors in a feedback loop that helps maintain temperature homeostasis. Select one: a. True b. False
Mark 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 body
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.
Draw a negative feedback loop for maintaining homeostasis for thermoregulation where your body temperature is above the set point. In your drawing, include the stimulus, sensor, integrator, effector, and the arrows between the components to indicate how they all relate (be sure to indicate what each of these components are in your body, for example, what is your integrator). Further, answer the following two questions. First, what might be different between the response of an endothermic and an ectothermic animal in maintaining homeostasis? Second, describe what a negative feedback loop is and how it pertains to homeostasis.
Which of the following statements is True?a. Ectotherms generate most of their body heatmetabolically.b. Ectotherms include birds and mammals.c. Ectotherms experience variable body temperatures.d. Ectotherms are known as “warm-blooded” animals.
The hormone insulin enhances the transport of glucose (sugar) from the blood into most body cells. Its secretion is controlled by a negative-feedback system between the concentration of glucose in the blood and the insulin-secreting cells. Therefore, which of the following statements is correct? A decrease in blood glucose concentration stimulates insulin secretion, which in turn further towers blood glucose concentration. An increase in blood glucose concentration stimulates insulin secretion, which in turn lowers blood glucose concentration. A decrease in blood glucose concentration stimulates insulin secretion, which in turn increases blood glucose concentration. An increase in blood glucose concentration stimulates insulin secretion, which in turn further increases blood glucose concentration. None of the preceding is correct.
Homeostasis is best described as a. Every deviation in the value of a physiological parameter is corrected by negative feedback regulation b. The body's internal environment is constantly changing The tendency of organisms to maintain a relatively constant internal environment d. The product of a chemical reaction negatively feeds back to inhibit its own production e. Physiological parameters do not change
What could happen due to a failure in homeostasis? Select one: a. The accumulation of waste products. b. The loss of excess water from the body. c. Maintaining excess levels of sugar in the body. d. All of the above are potential outcomes of failure of homeostasis.
Extracellular fluid in the human body is composed of (select all that apply) a. Lymph B. Interstitial fluid C. Blood plasma D. Cytoplasm E. Cerebrospinal fluid
Which of the following statements describe a characteristic of the human body? a. Under certain conditions your body’s resistance can be low as a few hundred ohms. b. The lower the resistance of your body, the more current that can be forced through it by a given amount of voltage. c. The resistance of your body is lower than the normal when you are wet. d. All of the above. EXPLAIN