What are the functions of pleural fluid?
What will be an ideal response?
1. It creates a moist, slippery surface so opposing membranes can slide across one another as the lungs move within
the thorax.
2. It holds the lungs tight against the thoracic wall.
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Why do most cells in the body require oxygen molecules?
a. Glucose cannot be broken down without it. b. It pulls electrons off the electron transport chains in the last part of cellular respiration. c. The electron transport system must pump it through the inner membrane for chemiosmosis. d. ATP synthase uses it to add a phosphate ion to ADP in order to make ATP. e. It pulls electrons off the electron transport chains in the last part of cellular respiration and ATP synthase uses it to add a phosphate ion to ADP in order to make ATP.
The four most common elements, comprising 96% of the body's mass, are:
A) chlorine, sodium, magnesium, potassium. B) carbon, sodium, phosphorus, sulfur. C) oxygen, nitrogen, hydrogen, carbon. D) oxygen, potassium, iron, copper.
Which of the following best describes the immune system in a neonate?
a. IgE antibodies are present at birth. b. IgG is the primary circulating antibody. c. Maternal antibodies are actively transported across the placenta. d. Maternal antibodies provide protection until the infant's immune system is mature.
Mesothelium is to the body cavities as endothelium is to the
A) kidneys. B) heart and blood vessels. C) urinary bladder. D) mouth. E) large intestine.