Exam 34: Neurons, Sense Organs, and Nervous Systems

Special glial cells surround and insulate the axons of neurons in the peripheral nervous system,forming the myelin sheath.These glial cells are called _______.

The most common type of interconnection between two neurons in the nervous system is a(n)

Nervous systems are composed of which two primary cell types?

In transmission of information in the nervous system,what is one way in which the process differs if a neuron,rather than a muscle fiber,serves as the postsynaptic cell?

As you read this question and think about your answer,cells inside your central nervous system compare and integrate various pieces of information.These cells are

What determines the function carried out by a neurotransmitter at a neuron-to-neuron synapse?

After a neurotransmitter such as acetylcholine or glutamate enters a synaptic cleft,several things can happen to it.Which of these does not happen to a neurotransmitter during normal nervous system activity?

While you read this question,your neurons send information to and from your brain;meanwhile,the metabolic needs of those neurons are assisted by

The "integrating cells" in the layers of the retina carry out many visual functions.The only function not typically carried out by some type of integrating neuron is

A cell membrane can undergo a rapid change from the resting potential to carrying an action potential.Which process enables this change?

The molecular mechanism by which light is absorbed into visual systems is

Suppose an action potential arrives at the axon terminal but the voltage-gated calcium channels at the terminal fail to open.What will most likely happen to the action potential?

The olfactory apparatus of mammals includes highly folded microvilli and cilia within the nasal region.What is the likely purpose of this greatly increased surface area?

The region where two neurons come into close contact with each other and pass along information is a(n)

The sound of the alarm clock in the morning triggers which type of sensory receptor in the sleeper?

A series of steps occurs between the arrival of an action potential at a presynaptic axon terminal and the initiation of an action potential in the postsynaptic neuron.What is the last step in this process?

Which statement about Na⁺-K⁺-ATPase is false?

Which statement about a metabotropic neurotransmitter receptor is true?

Which nervous system function occurs outside the central nervous system?

A potential difference can build up across a cell membrane,but not in a bulk solution inside the cell,because