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【单选题】
下列关于杂化轨道的叙述中，不正确的是 [    ]
A.
分子中中心原子通过SP 3 杂化轨道成键时，该分子不一定为正四面体结构
B.
杂化轨道只用于形成σ键或用于容纳未参与成键的孤电子
C.
H 2 SO 4 硫酸分子中三种原子均以杂化轨道成键
D.
N 2 分子中N原子没有杂化，分子中有一个σ键、2个π键
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参考答案：
举一反三
【判断题】There can only be one type of neurotransmitter in a neuron.
A.
正确
B.
错误
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【简答题】下列属于商品租金，却不属于成本租金的是（ ）。
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【单选题】We can infer from the passage that we may cure addiction by
A.
scanning Of brain as often as possible.
B.
consciously practicing cognitive skills.
C.
going through intensive rehabilitation programs.
D.
making the neurotransmitter less sensitive.
查看完整题目与答案
【单选题】After the neuro-skeletal muscle junction has completed the information transmission, the enzyme that can eliminate the neurotransmitter at the junction is
A.
Na + -K + -ATPase
B.
Acetylcholinesterase
C.
Adenylyl cyclase
D.
Phosphodiesterase
查看完整题目与答案
【多选题】Using acetylcholine as an example, explain how the same signal molecule can induce different responses in different target cells.
A.
Different cell types are configured to respond to the neurotransmitter acetylcholine in different ways.
B.
When a heart pacemaker cell is exposed to the neurotransmitter acetylcholine, its rate of firing decreases.
C.
When a salivary gland cell is exposed to the same signal, it secretes components of saliva, even though the receptors on both cell types are the same.
D.
In skeletal muscle, acetylcholine binds to a different receptor protein, causing the muscle cell to contract.
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【判断题】学习风格是个人在学习生活中逐渐训练形成的,一旦形成就不会再改变。( )
A.
正确
B.
错误
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【简答题】We can infer from the passage that we may cure addiction by [A] scanning of brain as often as possible. [B] consciously practicing cognitive skills. [C] going through intensive rehabilitation programs...
查看完整题目与答案
【单选题】In response to binding a neurotransmitter, a postsynaptic cell can
A.
only open chemically gated ion channels, causing graded potentials known as fast synaptic potentials.
B.
only close ion channels via G proteins and second messenger systems, producing slow responses.
C.
only regulate protein synthesis and affect the metabolic activities of the postsynaptic cell.
D.
open chemically gated ion channels, causing graded potentials known as fast synaptic potentials and regulate protein synthesis and affect the metabolic activities of the postsynaptic cell.
E.
open chemically gated ion channels, causing graded potentials known as fast synaptic potentials, close ion channels via G proteins and second messenger systems, producing slow responses, and regulate protein synthesis and affect the metabolic activities of the postsynaptic cell.
查看完整题目与答案
【单选题】Glutamate decarboxylation gives rise to γ-aminobutyrate (GABA), an inhibitory neurotransmitter. Its underproduction is associated with ______________. GABA analogs are used in the treatment of epileps...
A.
diabetes
B.
epileptic seizures
C.
brain tumor
D.
migraine
查看完整题目与答案
【单选题】商品：是指用来交换的劳动产品。根据上述定义，下列属于商品的是：
A.
高山、流水、阳光
B.
自给自足的农作物
C.
买来的日用品
D.
商店里卖不出去的发霉的面包
查看完整题目与答案
相关题目：
【判断题】There can only be one type of neurotransmitter in a neuron.
A.
正确
B.
错误
查看完整题目与答案
【简答题】下列属于商品租金，却不属于成本租金的是（ ）。
查看完整题目与答案
【单选题】We can infer from the passage that we may cure addiction by
A.
scanning Of brain as often as possible.
B.
consciously practicing cognitive skills.
C.
going through intensive rehabilitation programs.
D.
making the neurotransmitter less sensitive.
查看完整题目与答案
【单选题】After the neuro-skeletal muscle junction has completed the information transmission, the enzyme that can eliminate the neurotransmitter at the junction is
A.
Na + -K + -ATPase
B.
Acetylcholinesterase
C.
Adenylyl cyclase
D.
Phosphodiesterase
查看完整题目与答案
【多选题】Using acetylcholine as an example, explain how the same signal molecule can induce different responses in different target cells.
A.
Different cell types are configured to respond to the neurotransmitter acetylcholine in different ways.
B.
When a heart pacemaker cell is exposed to the neurotransmitter acetylcholine, its rate of firing decreases.
C.
When a salivary gland cell is exposed to the same signal, it secretes components of saliva, even though the receptors on both cell types are the same.
D.
In skeletal muscle, acetylcholine binds to a different receptor protein, causing the muscle cell to contract.
查看完整题目与答案
【判断题】学习风格是个人在学习生活中逐渐训练形成的,一旦形成就不会再改变。( )
A.
正确
B.
错误
查看完整题目与答案
【简答题】We can infer from the passage that we may cure addiction by [A] scanning of brain as often as possible. [B] consciously practicing cognitive skills. [C] going through intensive rehabilitation programs...
查看完整题目与答案
【单选题】In response to binding a neurotransmitter, a postsynaptic cell can
A.
only open chemically gated ion channels, causing graded potentials known as fast synaptic potentials.
B.
only close ion channels via G proteins and second messenger systems, producing slow responses.
C.
only regulate protein synthesis and affect the metabolic activities of the postsynaptic cell.
D.
open chemically gated ion channels, causing graded potentials known as fast synaptic potentials and regulate protein synthesis and affect the metabolic activities of the postsynaptic cell.
E.
open chemically gated ion channels, causing graded potentials known as fast synaptic potentials, close ion channels via G proteins and second messenger systems, producing slow responses, and regulate protein synthesis and affect the metabolic activities of the postsynaptic cell.
查看完整题目与答案
【单选题】Glutamate decarboxylation gives rise to γ-aminobutyrate (GABA), an inhibitory neurotransmitter. Its underproduction is associated with ______________. GABA analogs are used in the treatment of epileps...
A.
diabetes
B.
epileptic seizures
C.
brain tumor
D.
migraine
查看完整题目与答案
【单选题】商品：是指用来交换的劳动产品。根据上述定义，下列属于商品的是：
A.
高山、流水、阳光
B.
自给自足的农作物
C.
买来的日用品
D.
商店里卖不出去的发霉的面包
查看完整题目与答案
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