While a neuron membrane is depolarizing its ________.
A. sodium gates are partially open
B. sodium gates are fully open
C. chloride gates are partially open
D. potassium gates are fully open
E. chloride gates are fully open
Answer: B
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All of the following processes are important in follicular development. Which one occurs first?
A. GnRH secretion B. LH secretion C. Estrogen secretion D. Prolactin secretion E. FSH secretion
If the AV node is damaged so that it can no longer transmit the signal from the SA node (total heart block), will the ventricles continue to contract? Why or why not?
A) No: there are no cells left to pace and coordinate the heart beat. B) No: the SA node must be intact to pace the system. C) Yes: however, ventricular contractions will no longer follow atrial contractions, and the rate of ventricular contractions will be significantly slowed. D) Yes: the AV bundle will keep the heart going at the usual rate.
In ________ cells, invaginations of the external plasma membrane and proteins found there allow us to detect different colors of light.
A. cone B. pigment epithelial C. rod D. ganglion E. bipolar
Carol is a healthy 20-year-old female with no history of bleeding disorders. Which coagulation time is most likely hers?
A) 4 minutes B) 12 minutes C) 7 minutes D) 1 minute