True/False

Please answer all questions

1		Schwann cells produce layers of membrane containing myelin, which provides insulation for nerve fibers and plays an important role in nerve regeneration. (p. 247)
			A)	True
			B)	False
2		The myelinated white matter of the spinal cord contains ascending and descending nerves tracts that travel in a straight path to the brain; tracts from the right side of the spinal cord travel to the right side of the brain. (p. 249)
			A)	True
			B)	False
3		The limbic system is a network that blends higher mental functions and primitive emotions into a cohesive whole. (p. 253)
			A)	True
			B)	False
4		Recent studies indicate that the right and left cerebral hemispheres process the same information in an identical manner. (p. 255)
			A)	True
			B)	False
5		Following the transmission of a nerve impulse, the neuron has a short refractory period during which it cannot conduct a second impulse. (p. 260)
			A)	True
			B)	False
6		Cocaine affects the mood by interfering with the uptake of dopamine from synaptic clefts. (p. 265)
			A)	True
			B)	False
7		Heroin works by binding to receptors meant for the body's alkaloids. (p. 265)
			A)	True
			B)	False