Anatomy Quiz 8

In the process of spatial summation, _____ are added together and _____ are subtracted from that total to determine whether _____ will be created at the trigger zone of the postsynaptic neuron. A. EPSPs; IPSPs; action potentials B. IPSPs; EPSPs; action potentials C. EPSPs; IPSPs; graded potentials D. IPSPs; action potentials; EPSPs E. EPSPs; action potentials; IPSPs

A. EPSPs; IPSPs; action potentials

This type of nervous tissue contains neuronal cell bodies, dendrites, unmyelinated axons, axon terminals, and neuroglial cells. A. Gray matter B. White matter C. Nissl bodies D. Ganglia E. Nuclei

A. Gray matter

Hearing your cell phone ring in an otherwise quiet lecture hall is an example of which of the following types of nervous system functions? A. Sensory function B. Integrative function C. Motor function D. More than one of the types of nervous system functions E. None of the types of nervous system functions

A. Sensory function

An excitatory neurotransmitter _____ the postsynaptic membrane. A. depolarizes B. repolarizes C. hyperpolarizes D. does not affect the polarity of E. moves across channels in

A. depolarizes

Na+/K+-ATPase is considered to be an electrogenic pump because A. it contributes to the negativity of the resting membrane potential. B. the sodium ions are negatively charged. C. it exhibits low permeability. D. both it contributes to the negativity of the resting membrane potential and the sodium ions are negatively charged. E. all of these choices.

A. it contributes to the negativity of the resting membrane potential.

Which of the neurons is considered to be a bipolar neuron? A B C All of the neurons. None of the neurons.

All of the neurons.

Which of the diagrams in the figure represents a ligand-gated channel? A B C D

B

Which of the labeled cells in the diagram is a neuroglial cell that removes debris and acts as a phagocyte? A. A- Oligodendrocyte B. B- Microglial Cell C. C- Neuron D. D- Fibrous Astrocytes E. F- Ependymal Cell

B. B-Microglial Cell

Faster communication and synchronization are two advantages of A. chemical synapses B. electrical synapses C. ligand-gated channels D. voltage-gated channels E. mechanically-gated channels

B. electrical synapses

A depolarizing graded potential A. makes the membrane more polarized. B. makes the membrane less polarized. C. is considered a type of action potential. D. is the last part of an action potential. E. is seen when the cell approaches threshold.

B. makes the membrane less polarized.

Which part of the diagram is considered nerve fiber? A D I Both A and D All of these choices make up the nerve fiber

Both A and D

Which of the following types of cells display the property of electrical excitability? A. Muscle cells B. Neurons C. All of these choices D. None of these choices

C. All of these choices

Which of the labeled cells in the figure is NOT a neuroglial cell? A. A- Oligodendrocyte B. B- Microglial Cell C. C- Neuron D. D- Fibrous Astrocytes E. F- Ependymal Cell

C. C- Neuron

During this period, a second action potential can only be initiated by a larger than normal stimulus A. Latent period B. Absolute refractory period C. Relative refractory period D. All of these choices E. None of these choices

C. Relative refractory period

Which of the following are divisions of the peripheral nervous system? A. Somatic nervous system B. Autonomic nervous system C. Enteric nervous system D. All of these choices

D. All of these choices

During the resting state of a voltage-gated Na+ channel, 1. the inactivation gate is open. 2. the activation gate is closed. 3. the channel is permeable to Na+. A. 1 only B. 2 only C. 3 only D. both 1 and 2 are true E. all of these choices are true.

D. both 1 and 2 are true

A postsynaptic neuron responds to neurotransmitters released by a presynaptic neuron by creating A. EPSPs B. water-filled channels in its membrane C. IPSPs D. either EPSPs or IPSPs E. All the choices are correct

D. either EPSPs or IPSPs

In the CNS, this structure is produced by oligodendrocytes. A- B- Node of Ranvier C- Axon D- Schwann Cell E- Myelin Sheath

E- Myelin Sheath

This structure electrically insulates the axon of a neuron to increase the speed of nerve impulse conduction. A- B- Node of Ranvier C- Axon D- Schwann Cell E- Myelin Sheath

E- Myelin Sheath

A polarized cell A. has a charge imbalance across its membrane. B. includes most cells of the body. C. exhibits a membrane potential. D. includes most cells of the body and exhibits a membrane potential. E. all of these choices are correct.

E. all of these choices are correct.