PCQ9 Flashcards
hyperpolarization
some K+ channels remain open, and Na+ channels rest
threshold stimulus
any stimulus at or above this level will result in action potential
repolarization
Na+ channels are inactivating, and voltage-gated K+ channels open
depolarization
voltage-gated Na+ channels open
secretory zone
axon terminals release neurotransmitters
receptive region
receives stimuli
trigger zone
area where nerve impulse is generated
secretory region
plasma membrane exhibits voltage-gated Ca2+ channels
conducting region
plasma membrane exhibits voltage-gated Na+ and K+ channels
parallel after-discharge circuit
may be involved in complex, exacting types of mental processing
converging circuit
different types of sensory input can have the same ultimate effect
diverging circuit
one incoming axon triggers responses in ever-increasing numbers farther and farther along circuit
reverberating circuit
involved in activating fibers of a skeletal muscle such as the biceps
Reflexes are rapid, automatic responses to stimuli that will produce the same effect every time.
True
During depolarization, the inside of the neuron’s membrane becomes less negative.
True