Some cells retain the capacity to divide throughout their life cycle, whereas others do not divide in adulthood. Give one example of each type
What will be an ideal response?
Cells in bone marrow continually move through the cell cycle, producing about 2 million red blood cells each second.
Skin cells constantly divide to replace dead cells that are sloughed off the surface of the body.
Many cells in the nervous system leave the cell cycle, enter G0, and do not divide in adulthood.
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When the head of the fetus presses on the cervix, it triggers a release of which hormone in the mother's body?
a. oxytocin b. GnRH c. progesterone d. prolactin
The molecule that shuttles amino acids during protein synthesis is ____
a. DNA b. mRNA c. rRNA d. tRNA e. dRNA
Why are early symptoms of a Francisella tularensis infection often difficult to diagnose?
A) Symptoms are often mild and go unnoticed. B) The bacteria do not grow in culture. C) Patient symptoms are the only indication that leads to a diagnosis. D) Symptoms progress so slowly it can be months before the patient seeks medical care. E) Early symptoms can vary based on how the bacteria are transmitted.
The action potential travels down:
A. the dendrite. B. the synapse. C. the axon. D. both the dendrite and axon.