15) what triggers the release of acetylcholine from a synaptic terminal?
a) release of calcium ions from the synaptic vesicles
b) graded potentials in the synaptic terminal
c) synaptic vesicles fuse to dendrites
d) diffusion of sodium ions out of the synaptic terminal
e) diffusion of calcium ions into the synaptic terminal
16) the solid ball of cells that has been likened to a mulberry is called a
a) chorion.
b) blastula.
c) gastrula.
d) morula.
e) blastocyst.
17) which of the following is one of the critical events of the first trimester?
a) cleavage
b) implantation
c) placentation
d) embryogenesis
e) all of the answers are correct.
18) which of the following is not an action of estrogen?
a) stimulates bone growth
b) maintains female secondary sex characteristics
c) mimics the symptoms of menopause
d) maintains accessory reproductive organs
e) initiates repair of the endometrium
19) preganglionic fibers of parasympathetic nerves synapse on neurons located within