Neurobiology Quiz

What are the main parts of the central nervous system (CNS) and the peripheral nervous system (PNS)?

• Brain and spinal cord; somatic nervous system and autonomic nervous system

• Brain and spinal cord; sensory and motor neuron pathways

• Brain and spinal cord; sympathetic and parasympathetic nervous systems

• Brain and spinal cord; sensory and association areas

What is meant by the antagonistic action of the sympathetic and parasympathetic nervous systems on heart rate?

• Both increase heart rate

• Both decrease heart rate

• Sympathetic increases heart rate, parasympathetic decreases it

• Sympathetic decreases heart rate, parasympathetic increases it

Which side of the brain deals with information from the right visual field?

• Right cerebral hemisphere

• Left cerebral hemisphere

• Both hemispheres

• Neither hemisphere

What are the three key features involved in memory?

• Encoding, storage, and retrieval

• Encoding, processing, and retrieval

• Storage, processing, and retrieval

• Encoding, storage, and processing

What is the role of the corpus callosum?

• It processes sensory information

• It connects the brain to the spinal cord

• It allows transfer of information between cerebral hemispheres

• It stores long-term memories

What is myelination and how does it affect responses to stimuli?

• It is the process of forming synapses, which speeds up responses

• It is the covering of axons with myelin, which speeds up responses

• It is the removal of myelin, which slows down responses

• It is the formation of dendrites, which slows down responses

How do neurotransmitters at the synapse affect nerve impulses?

• They block the transmission of impulses

• They relay impulses from neuron to neuron

• They degrade impulses

• They store impulses for later use

What determines whether a neurotransmitter signal is excitatory or inhibitory?

• The type of neuron

• The type of receptor on the postsynaptic neuron

• The amount of neurotransmitter released

• The speed of impulse transmission

How can summation of weak stimuli trigger an impulse?

• By decreasing the threshold

• By increasing the number of synapses

• By releasing enough neurotransmitters to reach the threshold

• By blocking neurotransmitter reuptake

What is the function of endorphins?

• They increase heart rate

• They act as natural painkillers

• They stimulate hunger

• They decrease breathing rate