Week 2: Autonomic Nervous System- Neurotransmitters Flashcards
1
Q
Cholinergic
A
Bind with ACh
2
Q
Adrenergic
A
Bind with norepinephrine or epinephrine
3
Q
Autonomic neurons secrete
A
- ACh
- Norepinephrine
- Epinephrine
4
Q
All presynaptic ANS neurons are what kind of neuron?
A
Cholinergic
5
Q
Which postsynaptic ANS neurons are cholinergic?
A
Parasympathetic
6
Q
Which postsynaptic ANS neurons are adrenergic?
A
Sympathetic
7
Q
Kinds of cholinergic neurons/receptors
A
- Muscarinic
- Nicotinic
8
Q
Muscarinic
A
- When ACh binds, it initiates G-protein-mediated responses
- Excitatory or inhibitory
- Regulates glands, smooth muscle, HR
9
Q
Nicotinic
A
- ACh binding leads to fast induction of excitatory postsynaptic potential
- Nicotine binding = increased task performance and attention
10
Q
Most common sympathetic postganglionic neurotransmitter
A
Norepinephrine
11
Q
Where is norepinephrine released?
A
From adrenal medulla
12
Q
Kinds of adrenergic receptors
A
- Alpha (subtype 1 and 2)
- Beta (subtype 1 and 2)
13
Q
Where are adrenergic receptors most abundant?
A
- Peripheral smooth muscle
- Cardiac muscle
- Bronchial smooth muscle
14
Q
What adrenergic receptors are found in the heart?
A
- Beta-1
- Increases HR and contractility
15
Q
What adrenergic receptors are found in the bronchial smooth muscle?
A
- Beta-2
- Bronchial tree dilation
