10. Cell Signaling

Which of the following best explains how the cell theory was developed?

After nervous stimulation stops, what prevents acetylcholine (ACh) from continuing to stimulate the postsynaptic cell?

Which of the following proteins binds to actin at its binding sites during muscle contraction?

Where are photoreceptors primarily located in the human body?

In the context of cell signaling and action potentials, what type of ion channel opens first in response to a threshold stimulus?

Which of the following is an example of a receptor tyrosine kinase?

Which of the following statements about olfactory receptors is FALSE?

When assessing for arm drift in a patient with a suspected stroke, you should:

Which of the following correctly places the events of an excitatory postsynaptic potential (EPSP) in order?

Which second messenger causes the release of calcium ions ($\mathrm{Ca^{2+}}$) from the endoplasmic reticulum?

Which of the following statements about erythropoietin (EPO) is true?

If a body does not have enough potassium, which of the following is most likely to be affected in terms of cell signaling?

Which of the following is most likely to cause an endocrine disorder?

Which of the following choices includes only first messenger signaling molecules?

How do cells become specialized during the development of multicellular organisms?