Proteins may be degraded by proteosomes because
A) They have become damaged.
B) They are labeled with ubiquitin.
C) They are proteins which are rapidly degraded as part of the cell's control of protein levels.
D) All of the above
Answer: D
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Which of the following is not a function of astrocytes?
A. Production of CSF B. Formation of the blood-brain barrier C. Promotion of neuron growth and synapse formation D. Formation of scar tissue when neurons are damaged E. Conversion of blood glucose to lactate to support neuron nourishment
Typical heart rates of ________ beats per minute and respiratory rates of 30 breaths per minute in neonates are normal, and considerably higher than those of adults.
Fill in the blank(s) with the appropriate word(s).
Because the response of a nerve fiber is all-or-none, a greater intensity of stimulus does
not produce a stronger impulse. Indicate whether the statement is true or false
What is formed by closure of neural groove?
A. mesonephros B. mandibular processes C. neural tube D. secondary palate E. somites