Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 25, Problem 6MCQ
Summary Introduction
Introduction:
Most of the physiological functions that maintain homeostasis use negative feedback. The negative feedback is a change in a condition that triggers action which in turn, reverses the change. In negative feedback, the sensors detect a change in the internal environment and activate effectors that counteract the change. The ultimate effect is to restore the parameter to its normal range.
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Which of the following mechanisms could both be used by the body to increase body temperature if a person forgets a coat on a cold day? A. Superficial blood vessels dilate, and the thyroid decreases metabolism. B. Superficial blood vessels constrict, and the thyroid decreases metabolism. C. Superficial blood vessels dilate, and the thyroid increases metabolism. D. Superficial blood vessels constrict, and the thyroid increases metabolism.
which of the following scenarios can be classified as a negative feedback loop?
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Which of the following is an example of negative feedback?
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C. During digestion cells in the stomach produce HCl to begin breaking down proteins, the HCl then stimulates the release of pepsin, to continue breaking down proteins.
D. In the immune system, antibodies produced by B-cells bind to antigens, which activates other B-cells to produce antibodies of the same kind.
Chapter 25 Solutions
Biology: Concepts and Investigations
Ch. 25.1 - What is the difference between anatomy an d...Ch. 25.1 - What is the relationship among cells, tissues,...Ch. 25.1 - Trace the bodys early development from one...Ch. 25.1 - Prob. 4MCCh. 25.2 - If you were given a microscope slide with a slice...Ch. 25.2 - Suppose you determine that a tissue sample...Ch. 25.2 - Prob. 3MCCh. 25.3 - Which organ systems contribute to each of the five...Ch. 25.3 - Prob. 2MCCh. 25.4 - Use figure 25.9 to explain which materials enter...
Ch. 25.4 - Prob. 2MCCh. 25.5 - How does the integumentary system help the body...Ch. 25.5 - Prob. 2MCCh. 25.6 - Prob. 1MCCh. 25.6 - Suggest a specific prediction related to folic...Ch. 25 - Which of the following represents the correct...Ch. 25 - Epithelial tissue consisting of multiple layers of...Ch. 25 - Which of the following features do all types of...Ch. 25 - Prob. 4MCQCh. 25 - Ovaries produce gametes and hormones; these organs...Ch. 25 - Prob. 6MCQCh. 25 - The inner layer of skin is __________, whereas the...Ch. 25 - How does the integumentary system influence...Ch. 25 - Distinguish between the following. a. Organs and...Ch. 25 - Use the Internet to research cosmetic surgery....Ch. 25 - Prob. 3WIOCh. 25 - Explain how you use your organ systems (except...Ch. 25 - Describe how the circulatory system connects the...Ch. 25 - Prob. 6WIOCh. 25 - Prob. 7WIOCh. 25 - Describe at least one interaction between skin and...Ch. 25 - 1. What features distinguish the four types of...Ch. 25 - Prob. 2PITCh. 25 - Review the Survey the Landscape figure in the...
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- 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.arrow_forwardWhat is the function of the hormone erythropoietin? a. stimulates production of red blood cells b. stimulates muscle growth c. causes the fight-or-flight response d. causes testosterone productionarrow_forwardWhich of the following is an example of a normal physiologic process that uses a positive feedback loop? a. blood pressure regulation b. childbirth c. regulation of fluid balance d. temperature regulationarrow_forward
- Sweating 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_forwardWhich is/are example(s) of negative feedback? Select ALL that apply A. when your body gets too hot, the body starts to sweat, which helps cool you down B. when a pathogen is detected, an immune cell releases cytokines, which signal other cells to release cytokines, increasing the total number released over time C. when too much glucose builds up in the blood, insulin is released so that cells will absorb the glucose D. when you have a cut, platelets activate and work to form a clot, which signals more and more platelets to activate and help form the clotarrow_forwardWhich of these is an example of negative feedback?a. Air conditioning switches off when room temperature lowers.b. Insulin decreases blood sugar levels after eating a meal.c. Heart rate increases when blood pressure drops.d. All of these are examples of negative feedback.arrow_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_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_forwardWhich 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.arrow_forward
- Which 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_forwardAn example of negative feedback mechanism is the control of blood glucose levels by insulin. A __________ in blood glucose leads to the pancreas secreting insulin that promotes __________ of glucose from the bloodstream. a. fall; release b. fall; removal c. rise; removal d. rise; release e. none of the abovearrow_forwardMatch the body temperature control item to the appropriate location in the negative feedback loop. Effector when variable is low Effector when variable is high Control center Sensor Controlled variable A. Muscles for shivering and goosebumps B. Nerves in skin C. Brain D. Sweat glands E. Temperaturearrow_forward
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