PhysioLec: NMJ Flashcards
TRUE OR FALSE: Serotonin is formed by the hydroxylation & decarboxylation of Tryptophan and is present in blood platelets, GI tract & brainstem.
True
TRUE OR FALSE: Decrease in Ca++ presynaptically explains
habituation.
True
TRUE OR FALSE: Kainate receptors are metabotropic receptors.
False
TRUE OR FALSE: Histamine comes from Histidine.
True
TRUE OR FALSE: Long-term memory can be explained by long-term potentiation.
True
TRUE OR FALSE: The NMJ of smooth muscles have junctional folds.
False
TRUE OR FALSE: ACh is formed from the combination of choline & acetate
False
TRUE OR FALSE: The NMJ of skeletal muscles contain only one
neurotransmitter.
True
TRUE OR FALSE: Mechanical response in muscle starts prior to the electrical response.
False
TRUE OR FALSE: Norepinephrine comes from the amino acid Phenylalanine.
False
TRUE OR FALSE: Studying in a room with closed window blinds can lead to habituation.
True
The stimulus is benign so the response of the post-synaptic cell will be decreased.
TRUE OR FALSE: Having more specific receptors for a neurotransmitter makes them more selective to the transmitter.
True
TRUE OR FALSE: Histamine is released by mast cells (heparin-containing cells) and is also released by the posterior hypothalamus.
True
TRUE OR FALSE: Neurons that uses epinephrine as a neurotransmitter are called epinephergic neurons.
False
TRUE OR FALSE: GABA B receptors are metabotoropic receptors that act via G – protein to increase K+ conductance. Potassium exits the postsynaptic cell and inhibits it
True
TRUE OR FALSE: The partial, non-propagated potential at the NMJ of skeletal muscle is called an EPSP
False
TRUE OR FALSE: Post-synaptic accumulation of Ca++ explains
long-term potentiation.
True
TRUE OR FALSE: Epinephrine has more affinity to the α receptors.
False
TRUE OR FALSE: End-plate potentials always produce a propagated action potential in skeletal muscles.
True
TRUE OR FALSE: To inhibit a skeletal muscle, inhibitory end-plate
potentials will be generated at the NMJ
False
TRUE OR FALSE: GABA A receptors are ionotropic receptors and act at Cl- channels. Chloride enters and hyperpolarizes the cell
which inhibits the post synaptic cell.
True
TRUE OR FALSE: Feeling tired and sleepy at the end of the day,
the neurotransmitter secreted is Serotonin.
True
TRUE OR FALSE: Glycine is excitatory in the brain but inhibitory in the spinal cord. It acts by an increase in Cl- conductance
True
TRUE OR FALSE: The NMJ of smooth and cardiac muscles have
varicosities.
True
TRUE OR FALSE: Stimulating the AMPA & kainate receptors can
‘kick off’ the Mg++ block of the NMDA.
True
TRUE OR FALSE: Aspartate is one of the major inhibitory
neurotransmitters in the brain.
False
They have the inability to maintain contraction.
A. EATON LAMBERT SYNDROME
B. MYASTHENIA GRAVIS
C. NONE
B. MYASTHENIA GRAVIS
They are weak at first then become near normal strength.
A. EATON LAMBERT SYNDROME
B. MYASTHENIA GRAVIS
C. NONE
A. EATON LAMBERT SYNDROME
Antibodies against presynaptic ACh vesicles
A. EATON LAMBERT SYNDROME
B. MYASTHENIA GRAVIS
C. NONE
C. NONE
Antibodies against presynaptic voltage-gated Ca++ channels.
A. EATON LAMBERT SYNDROME
B. MYASTHENIA GRAVIS
C. NONE
A. EATON LAMBERT SYNDROME
Antibodies against ACh nicotinic receptors.
A. EATON LAMBERT SYNDROME
B. MYASTHENIA GRAVIS
C. NONE
B. MYASTHENIA GRAVIS
