Microtubules
a. serve as a mechanical stiffener for microvilli
b. form neurofilaments, which degrade in Lou Gehrig's disease
c. form non-muscle contractile assemblies
d. play an important structural role in parts of the cell subject to mechanical stress
e. is responsible for nuclear division but not cytoplasmic division
E
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Cerebral lateralization refers to the
A. difficulty in assigning a precise function to a specific region of the cortex. B. generalization that both cerebral hemispheres receive their sensory information from and project motor commands to the opposite side of the body. C. separation of the various lobes of the brain from each other. D. crisscrossing of information between the two hemispheres. E. functional differences between the right and left hemispheres.
The atria are separated from the ventricles externally by the
A. sinoventricular sulcus. B. anterior interventricular sulcus. C. posterior interventricular sulcus. D. coronary sulcus. E. None of the choices is correct.
The dense layer of connective tissue that surrounds an entire skeletal muscle is the
What will be an ideal response?
Exogenous and endogenous opioids have both similar and varying effects. Choose the statement that correctly summarizes their differences.
A. Exogenous, but not endogenous, can block transmissions of pain. B. Naloxone has been shown to block the proven actions of both exogenous and endogenous opioids. C. Like exogenous opioids like morphine, endogenous opioids cause strong feelings of euphoria. D. Endogenous are found in the CNS, whereas exogenous are released from neurons in the PNS.