Most enzyme-linked receptors affect the function of the target cell by
A- generating an action potential.
B- phosphorylating intracellular target proteins.
C- catalyzing synthesis of hormones in the cytoplasm.
D- facilitating the assembly of the cytoskeleton.
Which statement describes a possible outcome for a neurotransmitter after release into the synaptic cleft?
A- Reuptake into postsynaptic terminal via transporter proteins
B- Activation of G-protein-coupled receptor on postsynaptic cell
C- Modulation by an enzyme, increasing its efficiency
D- Activation of voltage-gated ion channel on presynaptic cell
Which of the following is not a catecholamine?
A- Histamine
B- Norepinephrine
C- Dopamine
D- All of the above are catecholamines
Peptide neurotransmitters are often released
A- more readily and quickly than nonpeptide transmitters
B- shortly after their synthesis in presynaptic terminals
C- as propeptides.
D- together with nonpeptide transmitters
Organophosphates inhibit the action of acetylcholinesterase. What effect does this have in the cell?
A- It prevents breakdown of ACh in the synapse causing increased activity at the postsynaptic cell
B- It prevents synthesis of ACh in the presynaptic terminal causing less neurotransmitter release
C- It prevents reuptake of ACh into the presynaptic terminal causing less neurotransmitter synthesis
D- It prevents binding of ACh on the postsynaptic cell causing less activity
Most enzyme-linked receptors affect the function of the target cell by
B- phosphorylating intracellular target proteins.
Which statement describes a possible outcome for a neurotransmitter after release into the synaptic cleft?
B- Activation of G-protein-coupled receptor on postsynaptic cell
Which of the following is not a catecholamine?
D- All of the above are catecholamines
Organophosphates inhibit the action of acetylcholinesterase. What effect does this have in the cell?
A- It prevents breakdown of ACh in the synapse causing increased activity at the postsynaptic cell
Get Answers For Free
Most questions answered within 1 hours.