Which of the following is NOT true of glial cells?
A. They deliver fuel molecules to neurons and remove the waste products of metabolism.
B. They are outnumbered 10 to 1 by neurons in the nervous system.
C. They are important for the growth and development of the nervous system.
D. They regulate the composition of the extracellular fluid in the CNS.
E. They form the myelin for axons.
Answer: B
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What differentiates passive transport from active transport?
A. Passive transport moves substances into cells, while active transport moves substances out of cells. B. Passive transport only moves water, while active transport only moves proteins. C. Passive transport does not use cellular energy, while active transport uses cellular energy. D. Passive transport requires carriers, while active transport does not.
When sitting upright, you are resting on your
a. pubic bones. b. ischial tuberosities. c. sacroiliac joints. d. iliac crest.
A myofilament that runs through the core of a thick filament and anchors it to a Z disc is called a(n) ________.
A. elastic filament B. myofibril C. sarcolemma D. T tubule E. thin filament
Which disorder is characterized by abdominal pain and discomfort, a change in the frequency of bowel movements, and a change in the consistency of stool?
A. Irritable bowel syndrome B. Crohn's disease C. Abdominal hernia D. Diverticulitis