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

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

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

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 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

EXSC Quiz 2.2

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