What can cause the depolarization at synapses?
a. activation of ionotropic glutamate receptors
b. activation of voltage gated Na+ channels
c. activation of ligand gated K+ channels
d. release of Na+ ions from pre?synaptic membrane
Answer: a. activation of ionotropic glutamate receptors
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In the Krebs cycle, citric acid is followed by ________ acid.
Fill in the blank(s) with the appropriate word(s).
Given these components of a reflex arc:
1. effector organ 2. interneuron 3. motor neuron 4. sensory neuron 5. sensory receptor A) 5,4,3,2,1 B) 5,4,2,3,1 C) 5,3,4,1,2 D) 5,2,4,3,1 E) 5,3,2,1,4
The right hand and wrist of an adult has __________ bones.
A. 15 B. 18 C. 25 D. 27 E. 28
In humans, old, worn out erythrocytes are destroyed in the _____ and their replacements are derived from _____ residing in the _____
a. spleen; pluripotent stem cells; red marrow b. spleen; embryonic stem cells; red marrow c. red marrow; pluripotent stem cells; spleen d. red marrow; embryonic stem cells; spleen e. liver; pluripotent stem cells; red marrow