Lecture Quiz 5

A  TRUE

B  FALSE

A  neurotransmitters diffuse across the synaptic gap and attach to receptors on the postsynaptic membrane causing the K+ gates to open allowing to K+ diffuse out

B  Ca2+ diffuses into the cell causing the release of neurotransmitters from the synaptic vesicles

C  an excitatory postsynaptic potential (EPSP), is generated

D  impulse at the axon terminal opens voltage-regulated Ca2+ gates

E  summation of EPSPs occur at the axon hillock, and if threshold is reached, an impulse is generated

A  TRUE

B  FALSE

A  primary somatic sensory cortex

B  parietal and temporal areas

C  prefrontal cortex

D  primary motor cortex

E  gustatory and olfactory cortex

A  FALSE

B  TRUE

A  controls the respiratory rate

B  controls the heart rate

C  controls the reflexes for swallowing, sneezing, coughing, vomiting and blinking

D  controls the size of blood vessels

E  controls the heart rate, controls the size of blood vessels, controls the size of blood vessels and controls the reflexes for swallowing, sneezing, coughing, vomiting and blinking

A  TRUE

B  FALSE

A  diffusion of K+ into the cell

B  diffusion of Na+ out of the cell

C  diffusion of Cl- out of the cell

D  diffusion of K+ out of the cell

E  diffusion of Na+ into the cell

A  FALSE

B  TRUE

A  stimulus opens Na+ gates → Na+ diffuse out of the cell and the resting potential becomes more negative and if a stimulus causes K+ gates to open, K+ will diffuse in and the resting potential will become less negative

B  repolarization is due to “leakage” of Na+ or K+ through the cell membrane via their respective leak channels and the degree of depolarization or hyperpolarization depends on how many Na+ or K+ gates open

C  the degree of depolarization or hyperpolarization depends on how many Na+ or K+ gates open and the number of gates that are opened depend upon the strength of the stimulus

A  FALSE

B  TRUE

A  microglia

B  Schwann cells

C  oligodendrocytes

D  epndymal cells

E  astrocytes