問題一覧
1
Normal, Quiet, Everyday Activities Like Resting and Digesting Are Controlled by Which Division of the Autonomic Nervous System?
Parasympathetic branch
2
In most neurons, what is the approximate threshold potential?
-55 mV
3
What converts environmental information into impulses that are then conducted to the central nervous system?
Sensory receptors
4
During an Action Potential, What Occurs That Results in Depolarization?
Sodium ions diffuse to the inside of the cell membrane.
5
What Part of the Brain Coordinates Voluntary Muscle Movements?
Cerebellum
6
If a Neuron's Membrane Potential Measures +25mV, the Neuron Is __________.
depolarized
7
Which of the Following Axons Would Have the Slowest Conduction Speed?
Unmyelinated, small-diameter axon
8
What Part of the Brain Contains the Thalamus and Hypothalamus, and Processes Sensory Information?
Diencephalon
9
During an Action Potential, What Occurs That Results in Repolarization?
Potassium ions diffuse to the outside of the cell membrane.
10
A __________ is defined as a rapid automatic response to a stimulus.
reflex
11
Where are the cardiac and vasomotor centers located?
Medulla oblongata
12
What Are the Gaps in the Myelin Sheath Called?
Nodes of Ranvier
13
What is the structure called that is a branch-like sensory process of a neuron that provides the main receptive surface for communication?
Dendrite
14
What Branch of the Autonomic Nervous System Prepares the Body for Stressful or Emergency Situations?
Sympathetic nervous system
15
What is the relative distribution of sodium and potassium ions across a neuronal membrane?
The sodium ion concentration is higher on the outside of the cell and potassium ion concentration is higher on the inside of the cell.
16
What Part of A Neuron Originates as a Single Structure but May Give Off Many Branches?
Axon
17
The respiratory areas are in the pons and in the __________.
medulla oblongata
18
What Type of Conduction Occurs When an Impulse Jumps From Node to Node Along a Myelinated Axon?
Saltatory conduction
19
Neurons That Release Acetylcholine Are __________ Neurons; Those That Secrete Norepinephrine Are __________ Neurons.
cholinergic; adrenergic
20
What Happens to a Neuron When the Membrane Becomes More Permeable to Sodium?
The neuron depolarizes.
21
What branch of the peripheral nervous system controls skeletal muscle?
Somatic
22
In a Resting Neuron, What Is the Difference in Charges Between the Outside and Inside of the Membrane Called?
Resting Potential