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Biology

GCSE · AQA

QuestionsFlashcards

Communicable Diseases
Monoclonal Antibodies
- Producing Monoclonal Antibodies
  6
- Uses of Monoclonal Antibodies
  7
Plant Disease
- Detection and Identification of Plant Diseases
  6
- Plant Defence Responses
  6

Negative Feedback Flashcards

All 5 cards in this deck

Where is adrenaline produced, and when is it released?: By the adrenal glands, in times of fear or stress.
What are the effects of adrenaline in the body?: It increases the heart rate and boosts the delivery of oxygen and glucose to the brain and muscles, preparing the body for 'flight or fight'.
Where is thyroxine produced, and what does it do?: By the thyroid gland; it stimulates the basal metabolic rate and plays an important role in growth and development.
What is negative feedback in hormone control?: When the level of a substance rises above or falls below normal, a response is triggered that brings the level back to normal.
True or false? Adrenaline levels in the blood are controlled by negative feedback.: False. Thyroxine is controlled by negative feedback; adrenaline is released in response to fear or stress.