Botulinum toxin exerts its lethal blow by blocking the release of what chemical compound?
a. calcium
b. serotonin
c. ACh
d. potassium
e. dopamine
c
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Read the two statements and use the following key to answer them.A. The first item is greater than the second item.B. The first item is less than the second item.C. The first item is equal or nearly equal to the second item.(1) Level of ACTH during stress(2) Level of ACTH during relaxation
Fill in the blank(s) with the appropriate word(s).
Following an automobile accident, a female patient complains of colicky abdominal pain. She also has been vomiting and her abdomen is distended. Which of the following is the most likely cause of her pain and signs?
A) Her small bowel has been torn. B) The accident freed a small clot from her aorta that subsequently entered and occluded the vasa recta supplying her ileum. C) The sympathetic nerve supply to her small bowel has been injured. D) Her parietal peritoneum has been lacerated. E) The accident triggered appendicitis.
These highly specialized lymph capillaries are found in the intestinal mucosa.
A. Cisternae chyli B. Lacteals C. Peyer's patches D. Thoracic ducts
What is the smallest functional unit of a muscle contraction?
A) Myofibril B) Sarcomere C) Myofilament D) T-tubule