How many tetrads form during synapsis?
A) 23
B) hundreds
C) thousands
D) 46
E) 4
Answer: A
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Harry suffers from cystic fibrosis and has severe breathing difficulties. His problems result from
A) inability of the respiratory defense mechanism to transport mucus. B) uncontrollable laryngospasms. C) production of thick secretions that are difficult to transport. D) both the inability of the respiratory defense mechanism to transport mucus and the production of thick secretions that are difficult to transport. E) All of the answers are correct.
The type of heat loss that occurs by sitting on a cold car seat is
a. radiation b. convection c. conduction d. evaporation e. none of these
What is a main function of the myenteric plexus?
A. It controls glandular secretion of the mucosa. B. It sends sensory information to the CNS through glossopharyngeal nerves. C. It stimulates bile production in the liver. D. It controls glandular secretion of the pancreas. E. It controls peristalsis.
Passage of a bolus through the oesophagus into the stomach is facilliated by which of the following?
(a) peristaltic acitvity of the esophageal muscularis externa (b) peristaltic activity of the gastric muscularis mucosae (c) reflux through the pahryngo eosophagal sphincter (d) smooth muscle in the eosophagal muscularis mucosae (e) refluc through the gastroeosophagal sphincter