BIOL Exam 3

In a chemical synapse, the axon terminal of the presynaptic neuron is in direct contact with (i.e., is directly touching) the dendrite of the postsynaptic neuron.

• True

• False

What molecules are located INSIDE synaptic vesicles?

• Calcium ions

• Neurotransmitters

• Phospholipids

• Sodium ions

In a resting (or unexcited) neuron, calcium is at a higher concentration ______________ of the cell.

• Inside

• Outside

• In the nucleus

• In the mitochondria

• In the cytoplasm

What molecule DIRECTLY causes a vesicle to merge (or fuse) to the membrane of the presynaptic neuron, thus releasing their contents into the synaptic cleft?

• Sodium ion

• Potassium ion

• Calcium ion

Released neurotransmitters will travel through ion channels of the postsynaptic neuron and enter the cytoplasm of that cell.

• True

• False

Sympathetic and parasympathetic neurons are what type of neuron?

• Afferent neurons

• Interneurons

• Efferent neurons

Cardiac tissue (the heart) is one target of the autonomic nervous system.

• True

• False

Which part of the autonomic nervous system contains ganglia close to the spinal cord?

• Sympathetic

• Parasympathetic

Rest and digest responses are considered part of the parasympathetic nervous system.

• True

• False

Cell bodies of pre-ganglionic autonomic motor neurons are found where?

• The dorsal horn of the spinal cord

• The lateral horn of the spinal cord

• The ventral horn of the spinal cord

• Ganglia