Regarding fertilization, which of the following events happens first?
A) The fast block to polyspermy
B) The cortical reaction
C) The acrosomal reaction
D) The slow block to polyspermy
E) Formation of a fertilization membrane
C
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Parasympathetic neurons stimulate the circular muscle of the iris to contract in response to dim light
Indicate whether the statement is true or false
Blood vessels are in close proximity to nephrons because certain substances within the ________ must be brought back into the bloodstream.
A. hormones B. plasma C. urine D. filtrate
Which of the following is not true of the anatomy of the stomach?
A. The muscularis contains three layers, whereas most tubular digestive organs contain two. B. The pyloric sphincter regulates the flow of chyme from the stomach into the duodenum. C. The cardia is the region that lies superior to the opening of the esophagus into the stomach. D. The greater curvature is on the lateral and inferior surfaces of the stomach. E. All of these are true of the stomach.
The process of protein formation directed by mRNA is called
A) replication. B) transcription. C) translation. D) mitosis. E) auscultation.