Cells with large numbers of microvilli on their apical surface are probably involved in ________.
A. reabsorption of molecules, such as during the production of urine
B. secretion of neurotransmitters
C. movement of the body
D. detoxification of chemicals
Answer: A
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If lung disease results in an arterial PO2 of 80 mmHg, the total amount of oxygen carried by the blood is 20% below normal.
Answer the following statement true (T) or false (F)
An antibody test on smooth muscle reveals fewer dense bodies and intermediate filaments in a patient with a colon disorder. What is the purpose of these structures?
A. can rapidly develop action potentials in smooth muscle cells B. shallow invaginations of cell membrane C. maintain relatively constant tension in smooth muscle for a period of time D. part of the intracellular cytoskeleton E. act as enzymes that remove phosphate from myosin
Which of the following is an example of simple columnar epithelial tissue?
a) epidermis/skin b) tubules/kidney c) lining/gastrointestinal tract d) lining/blood vessels
What occurs during the period of interphase known as the S phase?
A) DNA replication (synthesis) takes place. B) Genetic material is divided between the daughter cells. C) The cell is rapidly synthesizing proteins. D) Proteins, organelles, and cytosol are divided between the daughter cells.