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1
Neural impulses conform to the all-or-none law, which means that a neuron generates an action potential only if a threshold level of stimulation is reached. If the threshold is not reached, the neuron doesn’t fire.
2
Neural impulses are transmitted from one neuron to another via neurotransmitters. When an action potential reaches the terminal buttons of a neuron, neurotransmitter-filled synaptic vesicles fuse with the cell membrane, releasing neurotransmitter molecules into the synaptic cleft. These molecules link up with receptors on neighboring neurons and generate a voltage change or postsynaptic potential at the receptor site.
3
There are five noninvasive ways of studying the brain: (1) studying people with brain injuries or diseases, (2) electroencephalograms, (3) computerized tomography, (4) positron emission tomography, and (5) magnetic resonance imaging.
4
Yes, she could name what she sees. Information about the baseball goes to the left hemisphere, which controls language function.
5
The pituitary gland is sometimes called the master gland because it releases hormones that control other glands.
