Unit 3 Review(MODS 9-15) Fall 2019

part of autonomic nervous, calms you down

• Parasympathetic 
• sympathetic 

chemical messager, released into the bloodstream, slow but long lasting

• neurotransmitter
• hormones

receiving end of a neuron

• dendrites
• synapatics

A reason that one typically does not notice a blind spot in the visual field is that

• the blind spot is too small to see
• most visual stimuli only effect one hemisphere
• visual stimuli usually affect the occipital cortex in both hemispheres
• the blind spot habituates to a stimulus when the head is still
• the brain fills in missing information so there is no awareness that the visual field is incomplete

In transmitting sensory information to the brain, an electrical signal travels from the ________ of a single neuron.

• dendrites to the cell body to the axon
• axon to the dendrites to the cell body
• axon to the cell body to the dendrites
• dendrites to the axon to the cell body

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

• synaptic vesicle.
• pituitary gland.
• endocrine gland.
• myelin sheath.

The minimum level of stimulation required to trigger a neural impulse is called the

• refractory period.
• action potential.
• synapes.
• threshold.

Neurotransmitters are chemical messengers that travel across the

• cell body.
• synaptic gap.
• axon.
• myelin sheath.

Some opiate drugs have molecular structures so similar to endorphins that they mimic endorphin's euphoric effects in the brain, making these opiate drugs which kind of molecule?

• endocrines
• endorphins
• antagonists
• agonists

Messages are transmitted from your spinal cord to your digestive system's stomach muscles by the

• endocrine system.
• central nervous system.
• sympathetic nervous system.
• somatic nervous system.