In the proximal tubule:
a. the filtrate is hypertonic to plasma
b. most filtered nutrients, water and sodium are reabsorbed back into the bloodstream
c. the filtrate may become more concentrated than plasma
d. secretion is the major activity
Answer: b. most filtered nutrients, water and sodium are reabsorbed back into the bloodstream
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Inspiration involves the external intercostal and diaphragm muscles.
a. true b. false
Which of the following is NOT a characteristic of epithelial tissues?
A. They regenerate rapidly by mitotic cell division. B. They contain blood vessels. C. Cells are closely packed together. D. They are attached to a basement membrane.
Ribosomes are found attached to smooth endoplasmic reticulum or freely in the cytoplasm
Indicate whether the statement is true or false