Motor commands are carried by ________ from the brain along the spinal cord
A) both anterior and posterior roots
B) cranial nerves
C) spinal nerves
D) ascending tracts
E) descending tracts
E
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The same neurotransmitter binds to a postsynaptic cell but produces a variety of different effects. What does this mean?
A. The strength of the neurotransmitter varies. B. The amount of neurotransmitter released produces varying effects. C. The postsynaptic cell is expressing different types of receptors for the same neurotransmitter. D. The neuron must be dying. E. The size of the postsynaptic cell makes a difference in neurotransmitter effects.
Water can be reabsorbed at all regions of the nephron except the ________.
A. proximal convoluted tubule B. distal convoluted tubule C. descending limb nephron loop D. ascending limb of nephron loop
In water, phospholipids tend to form tiny droplets with hydrophobic tails buried inside called
A) micelles. B) chylomicrons. C) glycocalyces. D) eicosanoids. E) hydroceles.
Which of the following is not true of saliva?
A) moistens food and aids in compacting of the bolus B) cleanses the mouth C) contains enzymes that begin the breakdown of carbohydrates D) contains acids which aid in chemical digestion