Which of the following statements is true regarding neurotransmitters and synaptic signaling? Select all correct choices
A. All neurotransmitters are also hormones.
B. All synaptic signaling is rapid.
C. All synaptic signaling occurs between
nerve cells.
D. All neurotransmitters are released into the
blood stream.
B
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In California, a species of salamanders were geographically separated over time. The group that lived in southern California relied heavily on large gold blotches on their skin that helped to camouflage them from predators. The group that lived along the coast adopted a color pattern that mimicked a poisonous, colorful newt common to that area. Instead of being camouflaged, these salamanders
advertised their colors. What type of selection process has occurred over time? A. theoretical selection B. artificial selection C. experimental selection D. natural selection
In humans, where is the tympanic membrane?
a. in the outer ear, adjacent to the pinna b. deep within the middle ear c. between the outer ear and the middle ear's cavity d. adjacent to the stapes e. between the middle ear and inner ear
Muscle that is composed of cylindrical cells that maintain posture is ____
a. skeletal only b. smooth only c. cardiac only d. both skeletal and cardiac e. both cardiac and smooth
What structure best represents a polymer?
A. an amino acid B. a monosaccharide C. a nucleotide D. a protein E. a fatty acid