BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 23, Problem 7MCQ
Summary Introduction
Introduction:
Feedback can be defined as a process by which output of a particular system is routed back as specific inputs as a part of cause-and-effect on the body. Two types of feedback mechanisms are present that can be categorized into positive feedback and negative feedback.
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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 is an example of negative feedback?
A. High blood sugar will increase the viscosity of blood plasma (plasma is concentrated). In response, water is drawn into the plasma from surrounding tissues in order to dilute the plasma
B. Breathing rate increases during exercise to provide more oxygen to muscle cells. Heart rate also increase to increase the speed at which the oxygen is delivered.
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.
which of the following scenarios can be classified as a negative feedback loop?
a. increase in oxytocin caused by increased contractions
b. increase in blood pressure to reduce heart rate
c. increase in testosterone to help increase a fight or flight response
d. increase in platelet production to help increase blood clotting
Chapter 23 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 23.1 - Prob. 1MCCh. 23.1 - Prob. 2MCCh. 23.2 - If you were given a microscope slide with a slice...Ch. 23.2 - Prob. 2MCCh. 23.3 - Which organ systems contribute to each of the five...Ch. 23.3 - Prob. 2MCCh. 23.4 - Use figure 23.7 to explain which materials enter...Ch. 23.4 - Prob. 2MCCh. 23.5 - Describe the difference between endotherms and...Ch. 23.5 - Prob. 2MC
Ch. 23 - Which of the following represents the correct...Ch. 23 - Prob. 2MCQCh. 23 - Prob. 3MCQCh. 23 - Blood differs from other types of connective...Ch. 23 - Prob. 5MCQCh. 23 - Prob. 6MCQCh. 23 - Prob. 7MCQCh. 23 - Prob. 8MCQCh. 23 - Prob. 9MCQCh. 23 - Distinguish between the following pairs of terms....Ch. 23 - Where do epithelial tissues occur, and how are...Ch. 23 - List and describe six types of connective tissue.Ch. 23 - Prob. 4WIOCh. 23 - Prob. 5WIOCh. 23 - Use the Internet to research cosmetic surgery....Ch. 23 - Prob. 7WIOCh. 23 - Prob. 8WIOCh. 23 - Make a chart that compares and contrasts the...Ch. 23 - Prob. 10WIOCh. 23 - Prob. 11WIOCh. 23 - Prob. 12WIOCh. 23 - Prob. 13WIOCh. 23 - Prob. 14WIOCh. 23 - Would an alligator require more, less, or the same...Ch. 23 - Prob. 16WIOCh. 23 - Prob. 17WIOCh. 23 - Prob. 1SLCh. 23 - Prob. 1PITCh. 23 - Prob. 2PITCh. 23 - Prob. 3PIT
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- When faced with a sudden drop in environmental temperature, an endothermic animal will _______. a. experience a drop in its body temperature b. wait to see if it goes lower c. increase muscle activity to generate heat d. add fur or fat to increase insulationarrow_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_forwardSweating 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_forward
- Which 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_forwardThyroid hormone is the primary hormone that regulates body temperature. It does so by a. stimulating muscle contraction. b. increasing the number of Na+/K+ pumps in neurons. c. vasoconstriction of peripheral blood vessels. d. sweating.arrow_forwardWhich 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_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_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_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
- Match 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_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_forwardTo achieved homeostasis, the nervous system and endocrine system maintain Normal range of the following variables, EXCEPT? a.Blood calcium level b.Hormones in the cell c.Body Temperature d.Amount of water in the bodyarrow_forward
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