Acetylcholine exerts its effect by
A. stimulating the motor neuron's synaptic knob.
B. binding to receptors at the motor end plate.
C. activating acetylcholinesterase.
D. allowing calcium to enter the cell.
B
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Surfactant is necessary to prevent collapse of the alveoli in the lung because in its absence water molecules
A. vaporize and take up much less space.?B. are more strongly attracted to each other by van der Waals forces.?C. are more strongly attracted to each other by cohesive forces.?D. congregate around nearby proteins to which they adhere.
A patient reports to the doctor that she bruises very easily, and when she cuts herself, she has a hard time stopping the bleeding. What test might a health care provider order to help diagnose this problem?
A) plasma cholesterol concentration B) blood typing C) hematocrit D) coagulation time
Explain how mucosa-associated lymphatic tissues (MALT) complement the function of the lymph nodes in the lymphatic system
What will be an ideal response?
List the spinal flexor muscles
A) splenius capitis and splenius cervicis B) spinalis cervicis and spinalis thoracis C) iliocostalis cervicis, iliocostalis thoracis, iliocostalis lumborum D) longus capitis, longus colli, quadratus lumborum E) semispinalis capitis, semispinalis cervicis, semispinalis thoracis, multifidus