Unit 3A test

The ninetieth-century theory that bumps on the skull reveal a person's abilities and traits is called

• evolutionary psychology

• behavior genetics

• molecular biology

• biological psychology

• Phrenology

Which type of psychologist most directly investigates the links between biological activity and our thinking and behaviors?

• behaviorist

• psychotherapist

• biological psychologist

• cognitive psychologist

• psychometrician

The function of dendrites is to

• receive incoming signals from other neurons.

• release neurotransmitters into the spatial junctions between neurons.

• coordinate the activation of the parasympathetic and sympathetic nervous systems.

• Control pain through the release of opiate-like chemicals into the brain.

• transmit signals to other neurons.

An axon is

• a cell that serves as the basic building block of the nervous system.

• a layer of fatty tissue that encases the fibers of many neurons.

• an antagonist molecule that blocks neurotransmitter receptor sites.

• The extension of a neuron that carries messages away from the cell body.

• a junction between a sending and receiving neuron.

A brief electrical charge that travels down the axon of a neuron is called the

• synapes

• agonist

• action potential

• myelin sheath

• refractory period

The slowdown of neural communication in multiple sclerosis involves a degeneration of the

• threshold

• dendrites

• endocrine

• myelin sheath

• pituitary gland

As you are reading this question, the cell in your eyes are firing in response to the light coming from this screen. which type of neuron is carrying this message to the brain?

• interneurons

• sensory

• presynaptic

• motor

• efferent

A synapse is a(n)

• chemical messenger that triggers muscle contractions.

• automatic response to sensory input.

• neural network.

• junction between a sending neuron and a receiving neuron.

• neural cable containing many axons.

The chemical messengers released into spatial junctions between neurons are called

• hormones.

• neurotransmitters.

• synapses.

• sensory neurons.

• motor neurons.

Reuptake refers to the

• movement of neurotransmitter molecules across a synaptic gap.

• release of hormones into the bloodstream.

• inflow of positively charged ions through an axon membrane.

• reabsorption of excess neurotransmitter molecules by a sending neuron.

• the ending of the refractory period.