Quiz 2 questions Flashcards
The conversion of stimulus energy into electrochemical energy by sensory receptor cells is known as __.
transduction
With respect to NMDA channels, strong depolarization leads to the removal of ___ from the channel pore which allows ___ and ___ ions to flow into the cell.
magnesium; sodium; calcium
In sensory systems, the intensity of a sensory stimulus is represented by ___
action potential frequency
Which of these statements is true regarding emotional expression and experience?
A. Emotional expression requires cortex but emotional experience does not
B. Emotional experience and emotional expression both require an intact brain.
C. Emotional experience requires cortex but emotional expression does not
D. None of the above
C
T/F: NMDA receptors are both ligand gated and voltage dependent
true
According to Hebb’s Postulate, the coordinated activity of presynaptic and postsynaptic neurons strengthens the synapse between the two. Which of the following examples demonstrates the SPECIFICITY aspect of this phenomenon?
A. An active presynaptic neuron and an inactive presynaptic neuron synapse onto an active third neuron; when synchronized only the synapse between the active presynaptic neuron and the active postsynaptic neuron is strengthened.
B. A strongly firing presynaptic neuron and a weakly firing presynaptic neuron synapse onto an active third neuron; ALL neurons synchronize and synapses from the weak and strong cell onto the third cell are both strengthened
C. Both A and B
D. Neither A nor B
A
In the Kervern et al., article on perinatal ethanol exposure, AP-5 blocked LFS600-induced LTD revealing that LFS600-induced LTD was dependent on ___.
NMDA
During sensitization in Aplysia, a noxious stimulus causes ___ release from a modulatory interneuron which ultimately results in release of more ___ at the synapse
between the sensory and motor neurons.
Serotonin; Glutamate
A response to a _____ constitutes a
conditioned fear response in the rat.
Tone paired repeatedly with a foot shock
Patient S.M., who suffered selective bilateral
damage to the amygdala, exhibited __.
an absence of fear
A small influx of Ca++ induces ____ via _____ of AMPA receptors.
LTD; removal (vice versa for large influx of Ca)
Which of the following statements about the amygdala is false?
A. It is involved in making associations between neutral and fearful stimuli
B. It receives sensory input from the thalamus
C. It shows NMDA-receptor dependent long-term potentiation
D. It is involved in procedural learning
D
Which of the following does not lead to in the activation of CREB? A. Protein Kinase A B. Cyclic AMP C. MAP kinase D. All of the above contribute to CREB activation
D
Which of the following is an “effector” of Gprotein-initiated signaling mechanisms? A. Adenylyl cyclase B. Guanylyl cyclase C. Phospholipase C D. All of the above
D
Which of the following is a second messenger whose activity is terminated by a phosphatase? A. Calcium B. Cyclic AMP C. Cyclic GMP D. Inositol trisphosphate (IP3)
D