Polyphenism is a type of phenotypic plasticity that
A)
can be easily reversed when necessary.
B)
occurs only when adults are exposed to certain environmental factors.
C)
is also called developmental plasticity.
D)
all of the above
Answer:
C
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When a single presynaptic neuron repeatedly releases neurotransmitter in a very short period of time, it results in ____________ summation in the postsynaptic neuron
Fill in the blank with correct word.
When neurotransmitter binds to muscarinic receptors on smooth muscle cells in the gastrointestinal tract,
A. motility increases. B. motility decreases.
The term basic multicellular unit (BMU) refers to
A. the clusters of chondrocytes within the metaphysis that will be converted to bone. B. the osteoblasts found in the deepest layer of the periosteum, which are involved in appositional growth. C. group of osteoblasts and osteoclasts that work together during bone remodeling.
Which of the following factors would be the LEAST likely to result in secondary spinal cord injury?
A) Inflammation B) Hypothermia C) Hyperglycemia D) Hypoxemia