Which is a junction between two neurons?
a. Schwann cell
b. chemical synapse
c. node
d. sodium gate
e. voltage gate
B
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To which of the following is a megaspore most
closely and completely related?a. female gametophyte b. seed c. ovule d. egg e. endosperm
a. female gametophyte b. seed c. ovule d. egg e. endosperm
Proteins that are destined to become associated with the inner surface of the plasma membrane are:a
made on free ribosomes in the cytoplasm. b. manufactured in the same way as protein hormones. c. made on ribosomes located on the rough endoplasmic reticulum. d. transported to the plasma membrane within a secretory vesicle. e. manufactured in the same way as proteins destined to become external peripheral proteins.
Which is an example of a second messenger?
a. protein kinase A b. an ion channel c. cyclic AMP d. GABA e. insulin
Sensory pathways of smell and taste ____.
A. begin with chemoreceptors B. begin in the somatosensory cortex C. are not involved in communication D. are integrated with the advanced vomeronasal organ that humans possess E. are completely separated from one another