Microtubules
A) are usually composed of myosin.
B) are hollow, filamentous structures.
C) attach the plasma membrane to the underlying cytoplasm.
D) interact with filaments composed of tubulin to produce muscle contractions.
E) are found on the ribosomes.
B) are hollow, filamentous structures.
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Where are the cardiac, vasomotor, and respiratory centers found?
A. Medulla oblongata B. Pons C. Midbrain D. Spinal cord E. Diencephalon
You are giving a tap water enema to a patient. An adverse effect of the tap water enema is water intoxication. Explain.
What will be an ideal response?
Antibodies are produced by
A. the red bone marrow. B. cytotoxic T cells stimulated by helper T cells. C. B cells that differentiate to form plasma cells. D. natural killer cells as they lyse cancer cells. E. helper T cells stimulated by various cytokines.
A 13-year-old girl is brought to the ER after falling from a horse onto her left side. Her pulse is 120/min, blood pressure is 90/60 mm Hg, and respirations are 30/min. Physical examination reveals cold and clammy skin, bruising, and fractured 9th and 10th ribs on her left side at the posterior axillary line. Which of the following organs is most likely damaged in this patient?
(A) Stomach (B) Kidney (C) Lung (D) Liver (E) Spleen