Exam 4: Neural and Hormonal Systems

A neural impulse is generated only when excitatory minus inhibitory signals exceed a certain

The ________ is similar to the nervous system in that both produce molecules that act on receptors elsewhere in the body.

Motor neurons are an important part of the

An all-or-none response pattern is characteristic of the

Increasing excitatory signals above the threshold for neural activation will not affect the intensity of an action potential.This indicates that a neuron's reaction is

Jason's intensely uncomfortable withdrawal symptoms following heroin use were probably due in part to a reduction in his body's normal production of

The speed at which a neural impulse travels is increased when the axon is encased by a(n)

Neurons that enable people to throw a baseball by relaying messages from their central nervous system to their skeletal muscles are called

Information travels through axons that are bundled into the cables we call

Nerves are neural cables formed from bundles of

A synapse is a(n)

The neural impulses sent from your eyes to the visual processing centers of your brain will be no stronger or faster if you glance at a large campfire than if you glance at a burning candle.This best illustrates a characteristic of neural functioning known as

Biological psychologists can be credited for the following discoveries EXCEPT that

At the age of 22,Mrs.LaBlanc was less than 4 feet tall.Her short stature was probably influenced by the lack of a growth hormone produced by the

The part of the neuron that contains the nucleus is called the

The brain and spinal cord form the

Any drug molecule that binds to a neurotransmitter receptor site and mimics the neurotransmitter's excitatory or inhibitory effects is a(n)

Which of the following makes the human brain unique in comparison to other species?

Although phrenology incorrectly suggested that bumps on the skull revealed a person's character traits,phrenology did succeed in focusing attention on

The movement of positively charged sodium ions across the membrane of a neuron can produce a(n)