Question

39. In gencral, at neuro-muscular ular junctions where there are relatively few muscle fibers for each where a. there is considerable precision and control. b. there is minimal precision and control. c. the control is always ipsilateral. d. the control is always isomorphic. 40. Relatively stereotypic, highly consisting of one_ and feature the simplest neuro-motor mechanisms; sensory, extrinsic, and synaptic neuron. y stereotypie, highly genetically mediated behaviors, some characteristic of the mediated species producing them, are termed a and a reflexes; sensory, inter, and motor ncuron. c. sign stimuli; intrinsic, sensory, and receptor pattern generators; motor, sensory, and extrinsio neuron. induce wwing neurotransmiters, those that exert an excitatory effect on the brain, and wakefulness include a. histamine and orexin. b. GABA and NPY c. melatonin and serotonin d. endorphin and acetylcholine. 42. Cells in the prefrontal cortex, premotor cortex, and supplementary motor cortex first actively that actually prepare for a movement and then send messages to the instigates the movement: a. basal ganglia. b. red nucleus. c. primary motor cortex. d. cerebellum. 43. In the absence of any light of any light, dark, or time cues, most mammalian circadian rhythms would a. become slightly shorter than 24 hours (phase advanced). b. become slightly longer than 24 hours (phase retarded). slowly evolve into circumlunar rhythms. c. d. rapidly become phase-inverted. 44. When the reticular formation of a rat is lesioned, the rat However, if the reticular formation is activated by electrical stimulation of the severed end, the rat a. goes into a coma; becomes alert and active. b. exhibits continuous beta wave activity; becomes agitated. e. never enters REM sleep; permanently enters slow wave sleep. d. becomes very aggressive; develops a new raticular formation. e. none of the above.

Answer 1

1. Option A

Neuromuscular junctions are assembled on the muscle fibers at very precise locations called end plates (EP). Acetylcholine receptor (AChR) clusterization at the end plates is required for an accurate synaptic transmission.

2. Option B

3. Option A

4. Option C