Negative Feedback Flashcards

1️⃣ Familiarise yourself with the flashcards:

  • Look through all the flashcards to see what’s on both sides.
  • Make sure you understand the information on each card. If something’s unclear, click the link to the revision notes at the bottom of the page for more details.

2️⃣ Test yourself:

  • Look at the question or prompt on each card and try to remember the answer before flipping it over.
  • Check the answer and make a note of any cards you find challenging and need to go over more.

3️⃣ Consistently Review and Practice:

  • Use spaced repetition: spend more time on the cards you struggle with and go over them more often.
  • Regularly review all the flashcards to help you better understand and retain the information over time.

Note: We may include questions that have multiple correct answers. It’s useful to remember specific examples to understand these concepts better.

What is negative feedback in the body?

Negative feedback is a regulatory system that helps maintain conditions in the body within an ideal range by detecting changes and triggering responses to bring them back to normal levels.

What conditions are kept constant in humans using negative feedback?

Body temperature, water concentration, and blood glucose concentration.

What role does adrenaline play in the body?

Adrenaline, produced by the adrenal glands during stress or fear, prepares the body for the ‘fight or flight’ response by increasing heart rate, dilating bronchioles, diverting blood to muscles, converting glycogen to glucose, dilating pupils, and widening blood vessels.

How is thyroxine regulated in the body?

Thyroxine is regulated by negative feedback.

Low thyroxine levels trigger the hypothalamus to release TRH, which causes the pituitary gland to release TSH, stimulating the thyroid to produce more thyroxine.

Normal levels stop TRH and TSH release to maintain balance.

What are the main roles of thyroxine in the body?

Thyroxine stimulates the body’s basal metabolic rate and protein synthesis, which are important for growth and development.

How does adrenaline affect the body during the ‘fight or flight’ response?

Adrenaline increases heart rate, dilates bronchioles, diverts blood to muscles, converts glycogen to glucose, dilates pupils, and widens blood vessels to prepare the body to respond quickly in critical situations.

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