ANATOMY+PHYSIOLOGY
13th Edition
ISBN: 2810017675928
Author: OpenStax
Publisher: OpenStax
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Textbook Question
Chapter 1, Problem 36CTQ
Identify the four components of a negative feedback loop and explain what would happen if secretion of a body chemical controlled by a negative feedback system became too great.
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Positive feedback loops are the opposite of negative feedback loops. In a positive feedback loop, any change in the original variable triggers mechanisms that actually push the variable further in the direction of the change. Imagine that body temperature was regulated in this way. Briefly explain what would happen.
Describe 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.
Identify the follow as either negative or positive feedback.
The pancreas producing insulin to decrease blood sugar after a meal.
Clotting factors in the blood triggering the release of more clotting factors after damage to a blood vessel.
Contractions in childbirth resulting in labor and delivery.
Chapter 1 Solutions
ANATOMY+PHYSIOLOGY
Ch. 1 - View this animation...Ch. 1 - Water concentration in the body is critical for...Ch. 1 - A CT or CAT scan relies on a circling scanner that...Ch. 1 - A patient undergoing an MRI is surrounded by a...Ch. 1 - PET relies on radioactive substances administered...Ch. 1 - Which of the following specialties might focus on...Ch. 1 - A scientist wants to study how the body uses foods...Ch. 1 - The smallest independently functioning unit of an...Ch. 1 - A collection of similar tissues that performs a...Ch. 1 - The body system responsible for structural support...
Ch. 1 - Metabolism can be defined as the ________....Ch. 1 - Adenosine triphosphate (ATP) is an important...Ch. 1 - Cancer cells can be characterized as generic cells...Ch. 1 - Humans have the most urgent need for a continuous...Ch. 1 - Which of the following statements about nutrients...Ch. 1 - C.J. is stuck in her car during a bitterly cold...Ch. 1 - After you eat lunch, nerve cells in your stomach...Ch. 1 - Stimulation of the heat-loss center causes...Ch. 1 - Which of the following is an example of a normal...Ch. 1 - What is the position of the body when it is in the...Ch. 1 - To make a banana split, you halve a banana into...Ch. 1 - The lumbar region is ________. inferior to the...Ch. 1 - The heart is within the ________. cranial cavity...Ch. 1 - In 1901, Wilhelm Rontgen was the first person to...Ch. 1 - Which of the following imaging techniques would be...Ch. 1 - Which of the following imaging studies can be used...Ch. 1 - What are two major disadvantages of MRI scans?...Ch. 1 - Name at least three reasons to study anatomy and...Ch. 1 - For whom would an appreciation of the structural...Ch. 1 - Name the six levels of organization of the human...Ch. 1 - The female ovaries and the male testes are a part...Ch. 1 - Explain why the smell of smoke when you are...Ch. 1 - Identify three different ways that growth can...Ch. 1 - When you open a bottle of sparkling water, the...Ch. 1 - On his midsummer trek through the desert, Josh ran...Ch. 1 - Identify the four components of a negative...Ch. 1 - What regulatory processes would your body use if...Ch. 1 - In which direction would an MRI scanner move to...Ch. 1 - If a bullet were to penetrate a lung, which three...Ch. 1 - Which medical imaging technique is most dangerous...Ch. 1 - Explain why ultrasound imaging is the technique of...
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- In______, physical and chemical aspects of the body are being kept within tolerable ranges by body are being kept within tolerable ranges by controlling mechanisms. a. Positive feedback b. Negative feedback c. Homeostasis d. metastasisarrow_forwardgive two examples of feedback mechanisms in the human body. identify the type of feedback (negative or positive), the receptor, the control center and effector.arrow_forwardSelect the 4 statements that correctly describe negative feedback pathways. A sensor/receptor is required to monitor and limit levels. A sensor/receptor is unnecessary to monitor and limit levels. Feedback contributes to homeostasis. Feedback prevents homeostasis. Feedback stimulates the effector to continue to do the same thing. Feedback stops the effector from doing one thing and stimulates it to do the opposite. When the target level for a hormone is reached, feedback results in an increase of that hormone being released. When the target level for a hormone is reached, feedback results in a reduction of that hormone being released.arrow_forward
- Identify if the statement is True or False. If the statement is false, identify what is incorrect and correct it. The Endocrine system secretes regulatory hormones important for growth, reproduction and metabolism. The digestive system breaks down food, allows for nutrient absorption into blood and eliminates indigestible materials Extrinsic regulation results from activity of nervous system or endocrine system. In positive feedback the initial stimulus produces a response that reinforces the stimulusarrow_forwardSelect the 4 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. Feedback prevents homeostasis. Feedback contributes to homeostasis. Feedback stimulates the effector to continue to do the same thing. Feedback stops the effector from doing one thing and stimulates it to do the opposite. When the target level for a hormone is reached, feedback results in a reduction of that hormone being released. When a target level for a hormone is reached, feedback results in an increase of that hormone being released.arrow_forwardWhen you step outside in the cold, your body temperature decreases; which causes shivering or contractions of your muscles. In this example, the shivering or contracting of the muscles, is what part of the feedback loop?arrow_forward
- What is similar and different about a feedback loop or feedback cycle when describing a physiological process in the body?arrow_forwardThe role of insulin is to signal the cells to uptake glucose from the blood. Is this a positive or negative feedback loop? Explain what would happen if the other type of feedback loop were to occur.arrow_forwardOutline the events that shows the negative feedback loop that happens when you (choose only one): get a wound, consume too much sugar, get hot by being in a humid place, feel cold, drink too much water, touch a hot surface, get pinched or pricked, or are in a poorly lit room. You are encouraged to do research on the mechanisms that enables the responses for these.arrow_forward
- Jamie has fallen ill. Her body temperature has risen to high levels. Her blood pressure is high and her glucose level is low. In order for her body to return to homeostasis and for Jamie to feel better, the following events are taking place: Select all that apply Dilating blood vessels reduce blood pressure Lowering her body temperature by sweating Raise her body temperature by sweating Apply positive feedback to restore glucose levels in the blood stream by using the hormone glucagon which will raise blood sugar Apply negative feedback to restore glucose levels in the blood stream by using the hormone glucagon which will raise blood sugar Constricting blood vessels to increase blood pressurearrow_forwardIn your own words, explain the negative feedback loop of your body on a hot LA day. Answer using a few sentences.arrow_forwardWhat should happen to Body temperature ,Hydration Levels ,Blood glucose levels and Oxygen levels 30 minutes after completion of marathon? Is this an example of negative or positive feedback? Explain reasonsarrow_forward
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