Reference no: EM133381797
Questions
1. Action potential is unique to neurons and muscle cells. Other body cells do not use this process.
True
False
2. Which choice is true regarding myelin sheaths?
Myelin sheaths are composed of astrocytes and satellite cells
Myelin sheaths help release neurotransmitters from the axon terminal
Myelin sheaths allow for the conduction of nerve impulses (action potentials) to be transmitted faster
Myelin sheaths cover dendrites in the central and peripheral nervous system
3. Which portion of the neuron processes information?
Soma
Myelin
Axon
Dendrites
4. Which statement is true regarding neurons?
The nucleus of the neuron is located in the axon
Neurotransmitters are released from the axon terminal(s)
Both the axons and dendrites receive information from other neurons and cells
Myelin sheaths provide protection to the axons but slow the nerve impulse (action potential) through it
5. Which portion of the neuron receives information?
Dendrites
Soma
Axon
Myelin
6. Which statement is true regarding neurons?
The action potential is transmitted from the cell body to the axon terminal
All axons have myelin sheaths surrounding them
Dendrites pass information from the neuron to another cell
They are only found in the central nervous system
7. Which choice is true regarding neuroglia cells?
The majority of neuroglia cells are found in the peripheral nervous system
Astrocyte cells protect the neurons by acting almost like an immune cell
Oligodendrocytes produce myelin sheaths
Schwann cells function are located in the central nervous system
8. Which statement is true regarding the action potential process?
The action potential process only occurs at the nodes of Ranvier in myelinated axons
Hyperpolarization allows for Na+ and K+ ions to move into and out of the cell
The repolarization phase must occur prior to depolarization
Depolarization occurs because voltage gated K+ channels allow K+ ions to rush into the cell
9. Which statement is true regarding action potentials (nerve impulses)?
Neuroglia are solely responsible for creating action potentials
When action potentials reach the axon terminal, they cause the release of neurotransmitters
An action potential moves from the axon to the soma of a neuron
Is typically only generated in the dendrite portion of a neuron
10 As long as neurotransmitters are bound to a receptor, ion channels remain open.
True
False
11. Dopamine is categorized as which structural type of neurotransmitter?
Amino acids
Inhibitory
Biogenic Amines
Muscle contractor
12 Which statement is true regarding the neuron synapse?
The presynaptic and postsynaptic neuron membranes are not physically separated
The human body only uses one type of neurotransmitter in all of its synapses
Binding of a neurotransmitter on the postsynaptic neuron membrane can generate an action potential in that neuron
The binding of a neurotransmitter always causes an excitatory effect on that cell, never inhibitory
13. Chemicals released at the axon terminal are called:
Neurons
Secretions
Neurotransmitters
Inhibitors
14. During the repolarization phase of an action potential, the neuron begins to regain its negative internal charge.
True
False
15. Which statement is true regarding the motor (efferent) division of the nervous system?
Pertains to sensory information/stimuli
Delivers information about the external environment to the brain
Transmits information from the central nervous system to the body
It is part of the central nervous system
16. The resting membrane potential of a neuron, specifically in the axon, is more negatively charged inside when compared to the extracellular space (outside of the cell).
False
True
17 During an action potential, positive ions move into the cell as the depolarization spreads down the axon.
True
False
18. Which statement is true regarding the nervous system?
Neuroglia cells are only responsible for providing immunity to the nervous cells
Neurons can communicate with other cells without the use of neurotransmitters
Depolarization is the reduction of the membrane potential; going from negative to a more positive charge
Damaged myelin on an axon has no effect with its ability to transmit an action potential
19. An action potential can only be propagated along a myelinated axon.
True
False
20. During relative refractory period, a neuron cannot create another action potential to a stimulus no matter how strong or intense that stimulus is.
False
True
21. The generation or creation of an action potential depends on the strength of the stimulus a neuron receives.
True
False
22. The autonomic nervous system is a sub-division of sensory (afferent) division?
False
True
23. Which of the following ions rushes into the axon terminal, causing the release of neurotransmitters into the synaptic cleft?
Magnesium
Calcium
Potassium
Sodium
24. Which statement is true regarding neurons?
Sensory (afferent) neurons transmit information from the brain to muscles
Interneurons are found in both the central and peripheral nervous system
Motor (efferent) neurons transmit information from one muscle to another muscle
Sensory (afferent) and Motor (efferent) neurons are considered part of the peripheral nervous system
25. Inhibitory synapses cause depolarization, leading to the possibility of an action potential formation.
True
False