This figure shows the muscles of respiration. What muscles are indicated by number 1?
A. External intercostals
B. Scalenes
C. Internal intercostals
D. Diaphragm
E. Transversus thoracis
Answer: C
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The phenomenon of referred pain may occur because an ascending pathway for pain receives input from both visceral and somatic afferent fibers
Indicate whether the statement is true or false.
Which of the following statements regarding renal handling of Na+ is correct?
A. In the proximal tubule, Na+ is actively transported across the luminal membrane of the tubular epithelial cells. B. Atrial natriuretic factor increases Na+ reabsorption. C. In the absence of aldosterone, Na+ will be secreted by the cortical collecting ducts. D. Na+ is actively reabsorbed in the ascending limb of the loop of Henle. E. Without vasopressin, the collecting duct is impermeable to Na+.
What is the complement system?
A. A set of 20 inactive proteins activated by the presence of a pathogen B. Chemicals released by damaged tissue to cause blood vessels to widen C. Chemicals released by virally infected cells that encourage the production of antiviral protein D. Chemicals that raise the body temperature
Pseudostratified epithelia are well adapted to the digestive system because the cilia increase the surface area for absorption.
a. true b. false