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EXSC Quiz 2.2

Choose which is correct: the velocity of an AP
Myelinated Fibers (make paths 10x stronger) : Diameter of neuron --> Larger = Faster which = less resistance : Neurotransmitters
Myelinated Fibers (make paths 10x slower) : Diameter of neuron --> Larger = Faster which = less resistance : Neurotransmitters
Myelinated fibers (twitch type 2) : Distance between fibers : Neurotransmitters
None of the Above
What is Excitatory Postsynaptic Potential (EPSPs)?
(MUSCLE CONTRACTION) Makes postsynaptic neuron more likely to fire an action potential. Caused by the flow of negatively charged ions.
(MUSCLE RELAXATION) Makes postsynaptic neuron more likely to fire an action potential. Caused by the flow of negatively charged ions.
(MUSCLE CONTRACTION) Results from the flow of negative ions or positive ions out of the cell.
(MUSCLE RELAXATION) Results from the flow of negative ions or positive ions out of the cell.
What is Inhibitory Postsynaptic Potentials (IPSPs)?
(MUSCLE RELAXATION) Results from the flow of negative ions or positive ions out of the cell.
(MUSCLE CONTRACTION) Results from the flow of negative ions or positive ions out of the cell.
(MUSCLE CONTRACTION) Makes postsynaptic neuron more likely to fire an action potential. Caused by the flow of negatively charged ions.
(MUSCLE RELAXATION) Makes postsynaptic neuron more likely to fire an action potential. Caused by the flow of negatively charged ions.
The brain activates the muscles in your legs for running through the
Somatic Nervous System
Autonomic Nervous System
Sympathetic Nervous System
Afferent Nervous System
What excites muscle contraction?
Acetylcholine
Norepinephrine
Calcium
Adrenaline
The Autonomic Nervous System does what
Regulates skin, stomach, and heart.
Regulates blood, brain, and feet
Regulates PNS, CNS, and FNS
Regulates muscles, heart, and brain
This system activates "Fight or Flight"
Sympathetic
Parasympathetic
Somatic
Nervous
The Parasympathetic Nervous System does what
Nerves that only carry impulses AWAY from the central nervous system (CNS) are called
Motor (efferent) Neurons
Sensory (afferent) Neurons
Motor (afferent) Neurons
Sympathetic (efferent) Neurons
Nerves that carry impulses TOWARD the CNS only, are called
Sensory (afferent) Neurons
Motor (afferent) Neurons
Sympathetic (efferent) Neurons
Motor (efferent) Neurons
After axonal injury, regeneration in peripheral nerves is guided by
Schwann Cells
Nerve Cells
Motor Neurons
Sensory Cells
Neuron to Neuron communication
Basic unit of striated muscle and it is the repeating unit between two Z lines
Sarcomere
Cell membrane
Motor Neurons
Actin
Membrane bound structure found within muscle cells. Holding place for calcium and releases and gathers calcium.
Sarcoplasmic Reticulum
Endoplasmic Reticulum
Postsynaptic Cleft
Sarcomere
True or False: Troponin is attached to the protein tropomyosin and lies within the groove between actin filaments in muscle tissue
True
False: Troponin doesn't attach to tropomyosin
N a relaxed muscle, tropomyosin blocks the attachment site for the myosin crossbridge, thus preventing contraction
True
False
A site where a motor neuron communicates with e muscle fiber (cell). Call this a specialized synapse. It transmits impulse to muscle fibers
Neuromuscular Junction
Sarcoplasmic Reticulum
Rough Er
Myosin Cross-bridge
Communication between neuron and muscle order
Neurotransmitters release : Across Synaptic Cleft : Binds to receptors : Causes Depolarization
Neurotransmitters release : Across Synaptic Cleft : Binds to lobes : Causes Repolarization
What is a motor reflex?
Tapping your knee and reacting
Smiling
Sneezing
Farting
What is a muscle spindle?
They provide mechano-sensory information about muscle changes, muscle fiber length and tension
The provide reactions from the sarcoplasmic reticulum.
They are known for helping out in the neuromuscular junction
They are found in the synaptic cleft
Responds to muscle strength through the Reflex Action
Muscle Spindle
Golgi tendon organ
Muscle fiber
Reflex Arc
Sensory receptor embedded in tendon – monitors tension that develops in muscle. IPSP
Golgi Tendon Organ
Muscle Spindles
Myosin Cross-bridge
Actin
1. Inhibit agonists. 2. Excite antagonists. 3. Detect differences in tension. 4. Relax muscles. 5. Provide protection
Golgi Tendon Organs (GTO)
Inhibitory Reflexes (IR)
Muscle Fibers
Neuromuscular Junction
Neuron to neuron communication
Electrical --> Chemical --> Electrical
Chemical --> Electrical --> Chemical
Chemical--> Chemical--> Electrical
Electrical --> Chemical --> Chemcial
 
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