Organophosphate "nerve gases" induce paralysis by blocking neural stimulation of the neuromuscular junctions, while botulinum toxin produces the same effect by inhibiting acetylcholinesterase
Indicate whether the statement is true or false.
FALSE
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This figure shows a lateral view of the muscles of facial expression. What muscle does number 1 indicate?
A. Temporalis B. Masseter C. Buccinator D. Sternocleidomastoid E. Platysma
Match the part of the neuron to its description (answers may be used more than once).
1. may be covered with myelin 2. receive(s) most of the incoming synapses 3. occupy(ies) the least amount of cell volume 4. make(s) proteins necessary for repair of damaged neuron 5. contribute(s) most to membrane surface area of cell 6. supported by satellite cells 7. where most graded potentials originate 8. location of voltage -gated ion channels A. dendrites B. axon C. cell body
Which of the following respiratory volumes and capacities can not be measured with a spirometer?
A. Residual volume B. Vital capacity C. Tidal volume D. Expiratory reserve volume E. All of these can be measured with a spirometer.
Which of the following is true regarding the difference between the mucosa of the small and large intestines?
A) The small intestine has deeper intestinal crypts than the large intestine. B) Intestinal crypts are only found in the large intestine. C) The large intestine has larger circular folds than the small intestine. D) They both have villi, but only the small intestine has microvilli. E) The small intestine has simple columnar epithelium and the large intestine does not.