What smaller cavity within the thoracic cavity houses the heart, great blood vessels, esophagus, and trachea?
A) mediastinum B) diaphragm C) abdominal cavity D) peritoneal cavity
Answer: A
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Which of the following does NOT influence the rate of diffusion of a chemical across a plasma membrane?
a) concentration gradient of the chemical across the membrane b) mass of the diffusing chemical c) distance that the chemical has to diffuse d) amount of ATP available e) temperature
Which structure contains neurons?
A) G B) H C) B D) Y E) N
Which of the following statements is true?
A) Skeletal muscle cells are long and cylindrical with many nuclei. B) Cardiac muscle cells have many nuclei. C) Smooth muscle cells have many nuclei. D) Cardiac muscle is found in the heart and large blood vessels.
he delicate connective tissue that surrounds the skeletal muscle fibers and ties adjacent muscle fibers together is the
What will be an ideal response?