Question

1.) The primary motor cortex:

a.)is a gyrus of the brain located behind the central fissure or groove

b.) is a gyrus of the brain located in front of the central fissure or groove

c.) is an area in the temporal lobe of the brain

d.) is an area located in the occipital area of the brain

Temporal summation is where:

a) several synapses generate many excitatory potentials that add up to threshold,              causing an action potential to occur

b.) a single synapse generates many excitatory potentials that add up to threshold, causing an actual potential

c.) no synapses are involved

d.) none of the above

IPSP, or inhibitory postsynaptic potentials, occur:

a.) when GABA is present as a neurotransmitter

b.) when the inside of the neuron becomes more positive with the presence of sodium ions

c.) when the inside of the neuron becomes more negative with the presence of chlorine ions

d.) a & c above

e.) all the above

Regarding neural coding of the brain, qualitative information depends on         _______________ ,   while quantitative information depends         on_________________.

a.) number of receptors firing; type of sensory receptor firing

b.) type of sensory receptor firing; number of receptors firing

c.) the muscle spindle; the golgi apparatus

d.) recruitment; facilitation

Action potentials are characterized by:

a.) absolute and relative refractory periods

b.) decremental, or graded

c.) “all or none”

d.) a & c above

Refractory periods of nerve conduction results in:

a.) the cardiac muscle being autorhythmic

b.) nerve conduction traveling in one direction

c.) blood flowing in one direction

d.) none of above

Thank you!!!!!

Answer 1

1. ANSWER: B. is a gyrus of the brain located in front of the central fissure and groove.

Reason: Primary motor cortex is located on the frontal lobe infront of the central fissure.

2.ANSWER: d. None of the above.

Reason: temporal summation occurs when a high frequency single presynaptic terminal elicits action potential to a single postsynaptic neuron.

3. ANSWER: a. When GABA is present as a neurotransmitter.

Reason: GABA is the chief inhibitory neurotransmitter.

4. ANSWER: b. Type of receptors firing, number of receptors firing.

Reason: It is important to see the type of receptors firing for neural coding.

5. ANSWER: d. A and C .

Reason: Action potential is characterized by the presence of absolute and relative action potential and also by all or none law.