As neurotransmitters diffuse away from the synaptic cleft, the amount of time that neurotransmitters remain bound to their receptors increases.
a. true
b. false
b. false
*because neurotransmitter molecules and their receptors are in a state of equilibrium, as the number of neurotransmitter molecules decreases, the concentration gradient will increase.
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What are the phagocytic specialists called that are within the air sacs (alveoli) of the lungs?
a. alveolar macrophages b. lung neutrophils c. respiratory phagocytes d. pulmonary scavengers e. air sac scavengers
Describe the three phases of the general adaptation syndrome (GAS) that constitute the body's response to stress. Which endocrine secretions play dominant roles in the alarm and resistance phases?
What will be an ideal response?
Of the ligaments associated with the vertebral column, the ligament seen most posteriorly on sagittal MR images below the level of the cervical region is the _________________________.
Fill in the blank(s) with the appropriate word(s).
Which choice describes the countercurrent mechanism of the nephron loop?
A. Water moves into the ascending limb; sodium moves out of the ascending limb B. Water moves out of the descending limb; sodium moves out of the ascending limb C. Water moves into the descending limb; sodium moves out of the descending limb D. Water moves out of the ascending limb; sodium moves into the ascending limb