Check+ bio!! please and thank you!!?

Question

The process by which transmitter chemicals move across the synapse is
A.osmosis
B.diffusion
C.active transport
D.endocytosis

The answer I believe is c

The presence of a myelin sheath can increase the speed of nerve impulses from about 1 m/s to around 100 m/s. This increase is cause by the

A.increased rate of repolarization of the neuron membrane
B.unbroken flow of electrons between the nodes of Ranvier
C.continuous conduction of the impulse along the myelin sheath
D.movement of the action potential between the nodes of Ranvier
I belive the answer is either D or C not quite sure

thanks is advance!!

Answer 1

1. B
2. C

Answer 2

1.DECREASE(insulin decreases the glusoce level and glucagon increases) 2.LOW 3.BETA 4.INCREASE 5.MEDULLA(The chromaffin cells of the medulla are the body's main source of the catecholamine hormones adrenaline (epinephrine)) 6.ANTERIOR