A&P Chapter 12

Which of the following is not a function of the neuroglia? A) support B) memory C) secretion of cerebrospinal fluid D) maintenance of blood-brain barrier E) phagocytosis

The cytoplasm that surrounds the nucleus of a neuron is called the

Clusters of RER and free ribosomes in neurons are called

The axon is connected to the soma at the

Branches that may occur along an axon are called

Neurotransmitter for release is stored in

The rabies virus travels to the CNS via

Which of the following activities or sensations is not monitored by interoceptors

Which of the following is not involved in creating the resting potential of a neuron?

Which of the following interactions between electrical and chemical gradients does not lead to the establishment of a neuron's resting potential?

At the normal resting potential of a typical neuron, its Na-K ion exchange pump transports

Opening of sodium channels in the axon membrane causes

Voltage-gated channels are present

The following are the main steps in the generation of an action potential. 1. Sodium channels are inactivated. 2. Voltage-gated potassium channels open and potassium moves out of the cell, initiating repolarization. 3. Sodium channels regain their normal properties. 4. A graded depolarization brings an area of an excitable membrane to threshold. 5. A temporary hyperpolarization occurs. 6. Sodium channel activation occurs. 7. Sodium ions enter the cell and depolarization occurs.

The all-or-none principle states that

In the process of saltatory action potential propagation,

The ion that triggers the release of acetylcholine into the synaptic cleft is

Cholinergic synapses release the neurotransmitter

Adrenergic synapses release the neurotransmitter

Which of the following is the most important excitatory neurotransmitter in the brain?

The site in the neuron where EPSPs and IPSPs are integrated is the

EPSPs (excitatory postsynaptic potentials) occur when

PSPs (inhibitory postsynaptic potentials)

________ neurons form the afferent division of the PNS.

Raising the potassium ion concentration in the extracellular fluid surrounding a nerve cell will have which effect?

When cholinergic receptors are stimulated,

Presynaptic facilitation by serotonin is caused by