Metabolism is best described as how fast mitochondria work
Indicate whether the statement is true or false.
ANS: F, the sum of anabolism and catabolism
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The parasympathetic ganglia are arranged in an orderly chain along the spinal cord
Indicate whether the statement is true or false.
The cytoskeleton has several primary functions. The first and most obvious is that it acts as an interior skeleton that supports the rest of the cell. What is another function of the cytoskeleton?
A) It provides a communication network whereby chemo-electrical signals can be sent from one area of the cell to another. B) It creates a durable outer covering to increase the strength and rigidity of the cell. C) It provides a series of tracks along which vesicles can move throughout the cell. D) It connects one cell to another.
What happens when the membrane potential of a neuron reaches the threshold level?
a. Voltage-gated sodium channels open, and sodium diffuses out of the cell. b. Voltage-gated potassium channels open for a very brief period. c. Voltage-gated sodium channels close, so sodium cannot diffuse out of the cell. d. The sodium channel protein changes its shape to open the gates of the channel. e. The membrane potential is more negative than when at rest.
Mendel concluded that each pea has two units for each character, and each gamete contains one unit. Mendel's unit is now referred to as a:
A: gene. B: character. C :trait. D: genotype. E: phenotype.