The bones of the vertebral column form a cavity called the
A. nervous system passageway.?B. abdominal cavity.?C. spinal cavity.?D. vertebral canal.
D
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Choose the correct statement regarding motor units.
A) Muscle fibers of each motor unit are not mingled with those of other motor units. B) During a sustained contraction, all motor units are activated simultaneously. C) A motor neuron may control only two or three muscle fibers of the eye muscle(s). D) When muscles contract for sustained periods, maximal tension is maintained. E) Most motor neurons control fewer than five muscle fibers.
Which immunosuppressive drug is used orally, as an injectable, and as an ophthalmic ointment?
a. cyclophosphamide b. azathioprine c. cyclosporine d. monoclonal antibodies
Which of the following statements is NOT true?
a. Taste and smell senses are highly variable in sensitivities among species. b. The intraspecies roles of olfaction are largely mediated by pheromones. c. Sensilla are specialized projections from the cuticle of insects and are involved in chemical sensing d. In humans, the cortical gustatory area is located in the temporal lobe. e. The modality for mammalian taste receptors is called a tastant.
The membrane potential of most neurons at rest is:
A. equal to the equilibrium potential for potassium. B. equal to the equilibrium potential for sodium. C. slightly more negative than the equilibrium potential of potassium ion. D. more positive than the equilibrium potential for potassium. E. more positive than the equilibrium potential for sodium.