Feedback Mechanisms Quiz
18 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What process helps the kidneys expel more salt?

  • Chemiosmosis (correct)
  • Glycolysis
  • Acetyl CoA
  • Lactate Coz

In the human body, which molecule acts as the final electron acceptor in the electron transport chain?

  • Carbon sugars (glucose)
  • ATP synthase
  • Pyruvate
  • Oxygen (correct)

Which process occurs in the mitochondria and produces ATP?

  • Phosphorylation
  • Substrate level phosphorylation
  • Citric acid cycle (correct)
  • Glycolysis

What is the main function of ATP synthase in cellular respiration?

<p>Synthesize ATP (C)</p> Signup and view all the answers

Which process involves a feedback loop that helps control human body temperature?

<p>Negative feedback mechanism (B)</p> Signup and view all the answers

During which step of metabolism is Acetyl CoA produced?

<p>Lactate Coz (A)</p> Signup and view all the answers

What is the purpose of a feedback mechanism in the human body?

<p>To maintain stability and regulate internal conditions (D)</p> Signup and view all the answers

In the context of body temperature regulation, which type of feedback system is described as a 'negative feedback loop'?

<p>A system where the output decreases the disturbance in temperature (D)</p> Signup and view all the answers

Which best describes the role of a sensor in a feedback mechanism?

<p>To detect changes or disturbances and signal the corrective response (B)</p> Signup and view all the answers

Why is negative feedback important in maintaining homeostasis?

<p>To counteract changes and regulate internal conditions (C)</p> Signup and view all the answers

In the context of blood pressure regulation, which best describes a positive feedback mechanism?

<p>A mechanism that increases blood pressure further when it rises (D)</p> Signup and view all the answers

How does a negative feedback loop in temperature regulation differ from a positive feedback loop?

<p>Negative feedback counteracts temperature changes, while positive feedback intensifies them. (D)</p> Signup and view all the answers

What is the main purpose of negative feedback mechanisms in the human body?

<p>To maintain stability despite physiological changes (D)</p> Signup and view all the answers

In the context of body temperature regulation, what is the role of the effectors when the temperature rises above 37°C?

<p>To initiate sweating to cool down the body (D)</p> Signup and view all the answers

Which brain region plays a critical role in controlling body temperature through negative feedback mechanisms?

<p>Hypothalamus (A)</p> Signup and view all the answers

What is the function of positive feedback mechanisms in the human body?

<p>To amplify responses and reinforce changes (D)</p> Signup and view all the answers

How does the body respond to dehydration according to the text?

<p>By increasing water intake (C)</p> Signup and view all the answers

What happens when osmolality of plasma increases in the body?

<p>Kidneys reduce water reabsorption (B)</p> Signup and view all the answers

Flashcards

How do kidneys expel more salt?

A process that helps the kidneys eliminate excess sodium from the body.

Final electron acceptor in electron transport chain?

Oxygen is the final electron acceptor in the electron transport chain, a crucial step in cellular respiration.

What process produces ATP in mitochondria?

The citric acid cycle, which occurs in the mitochondria, is a series of chemical reactions that generate ATP, the cell's energy currency.

What's the role of ATP synthase?

ATP synthase, an enzyme in cellular respiration, uses the energy from a proton gradient to synthesize ATP.

Signup and view all the flashcards

What is a negative feedback mechanism?

A negative feedback mechanism is a process where the output of a system counteracts the initial stimulus, stabilizing the system.

Signup and view all the flashcards

When is Acetyl CoA produced?

Acetyl CoA is produced during the breakdown of carbohydrates, fats, and proteins, preparing them for further energy extraction.

Signup and view all the flashcards

What is the purpose of feedback mechanisms?

Feedback mechanisms allow the body to maintain stability, regulating internal conditions to ensure optimal function.

Signup and view all the flashcards

What's a negative feedback loop?

A negative feedback loop is a system where the output reduces the initial disturbance, like a thermostat regulating temperature by turning off the heater when the room warms up.

Signup and view all the flashcards

What is the role of a sensor?

A sensor, like a thermostat, detects changes in the body's internal environment and triggers a corrective response.

Signup and view all the flashcards

Why is negative feedback important for homeostasis?

Negative feedback ensures homeostasis, maintaining internal stability despite external changes by counteracting disturbances and keeping conditions within a narrow range.

Signup and view all the flashcards

What is a positive feedback loop?

A positive feedback loop amplifies the initial stimulus, causing a further increase in the output, like blood pressure rising even higher during a heart attack.

Signup and view all the flashcards

How do negative and positive feedback loops differ?

A negative feedback loop counteracts changes in temperature, while a positive feedback loop reinforces those changes, leading to greater deviation from the set point.

Signup and view all the flashcards

What is the main purpose of negative feedback mechanisms?

Negative feedback mechanisms play a crucial role in maintaining stability and regulating physiological processes in the human body.

Signup and view all the flashcards

Effectors' role when body temperature rises?

When the body temperature rises above 37°C, the effectors (e.g., sweat glands) activate sweating to cool down the body through evaporation.

Signup and view all the flashcards

Which brain region controls body temperature?

The hypothalamus, a region in the brain, acts as the control center for body temperature, using negative feedback mechanisms to maintain a stable temperature.

Signup and view all the flashcards

What's the function of positive feedback?

Positive feedback mechanisms amplify certain responses, promoting a quick and intense change, such as clotting factors during bleeding.

Signup and view all the flashcards

How does the body respond to dehydration?

When dehydrated, the human body increases water intake through thirst, aiming to restore fluid balance.

Signup and view all the flashcards

What happens when plasma osmolality increases?

Increased osmolality of plasma, indicating higher solute concentration, triggers the kidneys to reduce water reabsorption, leading to more concentrated urine.

Signup and view all the flashcards

More Like This

Hormone Feedback Mechanisms Quiz
5 questions

Hormone Feedback Mechanisms Quiz

AutonomousPeridot avatar
AutonomousPeridot
Feedback Mechanisms in Homeostasis Quiz
10 questions

Feedback Mechanisms in Homeostasis Quiz

AccomplishedBixbite avatar
AccomplishedBixbite
Feedback Mechanisms in Anatomy
21 questions

Feedback Mechanisms in Anatomy

TidySonnet avatar
TidySonnet
Feedback Mechanisms Flashcards
6 questions

Feedback Mechanisms Flashcards

ColorfulTaylor avatar
ColorfulTaylor
Use Quizgecko on...
Browser
Open
Browser
Browser