16. (Part 06, medium) 105-Mid
A: synaptic vesicles release neurotransmitters in the presynaptic terminal.
B: neurotransmitters diffuse across the synaptic clef.
C: Postsynaptic receptors are activated by the neurotransmitters.
D: Vesicles transport neurotransmitters from the synaptic terminals to the soma in the postsynaptic side.
举一反三
- Which is wrong about long-term habituation and sensitization? A: long-term sensitization involves synaptic facilitation B: synthesis of mRNA and proteins are required for memory consolidation from short-term to long-term C: growth of new synaptic connections can be observed in long-term habituation D: both involve structural changes in the presynaptic terminals of sensory neurons
- The amino acids that can serve as neurotransmitters include A: Asp B: Asn C: Glu D: Gly E: Gln
- Through which of the following structure does nerve fibers conduct nerve impulses? A: Myelin sheath B: Axolemma C: Neurofilament D: Synaptic vesicle
- The reason for rapid conduction of impulses along myelinated nerve fibers is that they have( ) A: long axons B: thick axons C: many synaptic vesicles in the axons D: clefts of Schmidt and Lantermann E: nodes of Ranvie
- Tachycardia is more common observed in phentolamine than prazosin because the former A: has some M-agonist action B: has some β1-agonist action C: blocks postsynaptic α₂-receptors D: blocks presynaptic α₂-receptors E: stimulates heart directly
内容
- 0
Neurons<br/>conduct nerve impulses through:() A: microtubule B: axolemma C: endoneurium D: synaptic vesicle E: perineurium
- 1
_______-coated vesicles<br/>are involved in transporting molecules from the plasma membrane on<br/>the inward endocytic pathway. () A: COPⅠ B: COPⅡ C: Clathrin D: Sar 1
- 2
_______-coated vesicles are involved in transporting molecules from<br/>the plasma membrane on the inward endocytic pathway. () A: COPⅠ B: COPⅡ C: Clathrin D: Sar 1
- 3
Which of the following statements about tendon reflexes is wrong? A: single synaptic reflex B: The receptor is tendinous organ. C: Stretch reflex occurs when the tendon is pulled rapidly. D: The effector is the muscle fiber of the same muscle.
- 4
Phentolamine<br/>may increase heart rate by targeting____. A: presynapticα2-adrenoceptors B: postsynapticα2-adrenoceptors C: cardiacβ-adrenoceptors D: cardiacα1-adrenoceptors E: vascularα1-adrenoceptors