Which of the following best describes the term sarcoplasmic reticulum?
A) thin filaments are anchored here
B) protein that acts for elasticity of resting muscle
C) repeating unit of striated myofibrils
D) storage and release site for calcium ions
E) largely made of myosin molecules
D) storage and release site for calcium ions
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Explain the relationship between microtubules, cilia, flagella, centrioles, spindle fibers, and the centrosome.
What will be an ideal response?
The left kidney is slightly lower than the right because of the space occupied by the liver just above it.
a. true b. false
Each complex of central canal and matrix rings in compact bone is known as ________
A) a perforating (Volkmann's) canal B) the epiphysis C) a canaliculus D) a central (Haversian) canal E) an osteon (Haversian system)
Match the following:
A) Lumbar plexus B) Brachial plexus C) Cervical plexus D) Sacral plexus 1) The obturator and femoral nerves branch from this plexus. 2) Striking the "funny bone" (ulnar nerve) may cause injury to a nerve of this plexus. 3) Trauma to a nerve of this plexus may cause wrist drop. 4) A fall or improper administration of an injection to the buttocks may injure a nerve of this plexus. 5) The phrenic nerve branches from this plexus.