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Biology

GCSE · Edexcel

QuestionsFlashcards

Photosynthesis
Plant Structure
Transport in Plants
Plant Hormones
- Plant Hormones & Growth
  7
- Using Plant Hormones Commercially
  7

Transport in Animals
- The Need for Transport
  7
- Factors Affecting the Rate of Diffusion
  7
Respiration
- Respiration
  6
- Practical: Investigating Respiration
  5
Gas Exchange
Circulatory System
- The Blood & Blood Vessels
  6
- The Circulatory System
  8

Adrenaline Flashcards

All 6 cards in this deck

Which gland releases adrenalin, and in what situation?: The adrenal glands, when a person is frightened or stressed, to prepare the body for fight or flight.
What effect does adrenalin have on heart rate, blood pressure and blood flow to the muscles?: It increases all three: heart rate up, blood pressure up, and more blood flowing to the muscles.
How does adrenalin raise blood sugar levels?: It stimulates the liver to convert glycogen into glucose, which is released into the blood.
Why does the release of adrenalin improve an athlete's performance?: More glucose and oxygen reach the muscles, increasing the rate of respiration to release more energy for the working muscles.
True or false? Adrenalin makes the liver convert glucose into glycogen.: False. Adrenalin makes the liver convert glycogen into glucose, raising blood sugar levels.
What is meant by the 'fight or flight' response?: The body being prepared by adrenalin to either fight a danger or run away from it.