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Combined Science: Biology

GCSE · Edexcel · foundation

QuestionsFlashcards

Disease
Defence Against Disease
Development of Medicines
- Antibiotics
  4
- Discovery & Development of New Drugs
  3
Non-Communicable Diseases
- Lifestyle & Non-Communicable Disease
  7
- Cardiovascular Disease
  6

The Organism in the Environment
Human Influences on the Environment
- Human Impact on Biodiversity
  6
- Benefits of Maintaining Biodiversity
  4
Cycles within Ecosystems

The Human Nervous System Flashcards

All 9 cards in this deck

What two organs make up the central nervous system (CNS)?: The brain and the spinal cord.
What is the role of a sensory receptor?: To detect a stimulus (e.g. a pin pricking the skin).
In a motor neurone, what is the long fibre that carries the impulse away from the cell body called, and what is the fatty layer around it called?: The axon; the myelin sheath.
What is the function of the myelin sheath on a neurone?: It insulates the axon so the electrical impulse travels faster.
In a reaction-time test, a student presses a key as soon as a blue square turns yellow. What is the stimulus and what is the response?: Stimulus: the square changing colour. Response: pressing the key.
What is the job of a sensory neurone?: It carries electrical impulses from a sensory receptor to the central nervous system (brain and spinal cord).
Which type of neurone carries electrical impulses from the central nervous system to an effector?: A motor neurone.
What is an effector?: A muscle or gland that carries out the response to a stimulus: a muscle contracts, or a gland releases a substance such as a hormone.
In which direction does a dendron carry electrical impulses?: Towards the neurone's cell body (the axon carries them away from it).