Neurons & Synaptic Transmission (AQA A-Level Psychology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Approximately how many neurons are found in the human brain?
Approximately how many neurons are found in the human brain?
100 billion
Why are sensory neurons classified as unipolar?
Why are sensory neurons classified as unipolar?
They transmit messages in one direction
What is the main function of relay neurons in the nervous system?
What is the main function of relay neurons in the nervous system?
Connect regions within the CNS
Motor neurons carry signals from the CNS to which targets?
Motor neurons carry signals from the CNS to which targets?
Organs, glands, and muscles
What is the primary function of the myelin sheath?
What is the primary function of the myelin sheath?
Insulates axon & increases signal speed
What role do nodes of Ranvier play in neural transmission?
What role do nodes of Ranvier play in neural transmission?
Allow electrical signal to jump quickly
What did Santiago Ramón y Cajal discover about nerve cells?
What did Santiago Ramón y Cajal discover about nerve cells?
They are separate entities
How quickly does most neural processing occur?
How quickly does most neural processing occur?
50-100 milliseconds
What does the lock-and-key mechanism in synaptic transmission ensure?
What does the lock-and-key mechanism in synaptic transmission ensure?
Only specific transmitters bind receptors
What effect does inhibitory transmission have on the post-synaptic neuron?
What effect does inhibitory transmission have on the post-synaptic neuron?
Decreases likelihood of firing