284593
In parasympathetic nervous system, which of the following is released ?
1 Epinephrine
2 Norepinephrine
3 Serotonin
4 Acetylcholine
Explanation:
D In parasympathetic nervous system, the neurotransmitter released is acetylcholine. This neurotransmitter binds to specific receptors on target cells, which leads to shows effect such as slowing down heart rate, increasing digestive activity and promoting relaxation.
JIPMER-2010
Neural Control and Coordination
284594
Which of the following is important for muscle contraction and nerve impulse transmission ?
1 \(\mathrm{Ca}^{2+}\) ions
2 \(\mathrm{Mg}^{2+}\) ions
3 \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) ions
4 \(\mathrm{Fe}^{2+}\) ions
Explanation:
B Both calcium \(\left(\mathrm{Ca}^{2+}\right)\) and magnesium \(\left(\mathrm{Mg}^{2+}\right)\) ions are essential for muscle contraction and nerve impulse transmission. \(\mathrm{Ca}^{2+}\) initiates muscle contraction and is involved in neurotransmitter release, while \(\mathrm{Mg}^{2+}\) promotes muscle relaxation and enzyme activation.
JIPMER-2010
Neural Control and Coordination
284595
Transmission of signals or impulse through a nerve is.
1 Physical phenomenon
2 Chemical phenomenon
3 Physic-chemical phenomenon
4 Mechanical phenomenon
Explanation:
B There are two types of synapse, namely electrical synapse and chemical synapse. Electrical synapse is faster than chemical synapse. Chemical synapse called neurotransmitters. It helps in the transmission of impulses at chemical synapses. Hence, transmission of signals or impulse through a nerve is known as chemical phenomenon.
AMU-1995
Neural Control and Coordination
284598
How do parasympathetic neural signals affect the working of the heart?
1 Reduce both heart rate and cardiac output
2 Heart rate is increased without affecting the cardiac output
3 Both heart rate and cardiac output increase
4 Heart rate decreases but cardiac output increases
Explanation:
A Sympathetic and parasympathetic have opposite function to each other. Sympathetic nerves increase both heart rate and cardiac output, and also strength of ventricular contraction. The sympathetic division blood pressure, and the parasympathetic division decreases it. While, parasympathetic neural signals reduce the rate of heart beat. The speed of conduction of action potential and there by the cardiac output.
284593
In parasympathetic nervous system, which of the following is released ?
1 Epinephrine
2 Norepinephrine
3 Serotonin
4 Acetylcholine
Explanation:
D In parasympathetic nervous system, the neurotransmitter released is acetylcholine. This neurotransmitter binds to specific receptors on target cells, which leads to shows effect such as slowing down heart rate, increasing digestive activity and promoting relaxation.
JIPMER-2010
Neural Control and Coordination
284594
Which of the following is important for muscle contraction and nerve impulse transmission ?
1 \(\mathrm{Ca}^{2+}\) ions
2 \(\mathrm{Mg}^{2+}\) ions
3 \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) ions
4 \(\mathrm{Fe}^{2+}\) ions
Explanation:
B Both calcium \(\left(\mathrm{Ca}^{2+}\right)\) and magnesium \(\left(\mathrm{Mg}^{2+}\right)\) ions are essential for muscle contraction and nerve impulse transmission. \(\mathrm{Ca}^{2+}\) initiates muscle contraction and is involved in neurotransmitter release, while \(\mathrm{Mg}^{2+}\) promotes muscle relaxation and enzyme activation.
JIPMER-2010
Neural Control and Coordination
284595
Transmission of signals or impulse through a nerve is.
1 Physical phenomenon
2 Chemical phenomenon
3 Physic-chemical phenomenon
4 Mechanical phenomenon
Explanation:
B There are two types of synapse, namely electrical synapse and chemical synapse. Electrical synapse is faster than chemical synapse. Chemical synapse called neurotransmitters. It helps in the transmission of impulses at chemical synapses. Hence, transmission of signals or impulse through a nerve is known as chemical phenomenon.
AMU-1995
Neural Control and Coordination
284598
How do parasympathetic neural signals affect the working of the heart?
1 Reduce both heart rate and cardiac output
2 Heart rate is increased without affecting the cardiac output
3 Both heart rate and cardiac output increase
4 Heart rate decreases but cardiac output increases
Explanation:
A Sympathetic and parasympathetic have opposite function to each other. Sympathetic nerves increase both heart rate and cardiac output, and also strength of ventricular contraction. The sympathetic division blood pressure, and the parasympathetic division decreases it. While, parasympathetic neural signals reduce the rate of heart beat. The speed of conduction of action potential and there by the cardiac output.
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Neural Control and Coordination
284593
In parasympathetic nervous system, which of the following is released ?
1 Epinephrine
2 Norepinephrine
3 Serotonin
4 Acetylcholine
Explanation:
D In parasympathetic nervous system, the neurotransmitter released is acetylcholine. This neurotransmitter binds to specific receptors on target cells, which leads to shows effect such as slowing down heart rate, increasing digestive activity and promoting relaxation.
JIPMER-2010
Neural Control and Coordination
284594
Which of the following is important for muscle contraction and nerve impulse transmission ?
1 \(\mathrm{Ca}^{2+}\) ions
2 \(\mathrm{Mg}^{2+}\) ions
3 \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) ions
4 \(\mathrm{Fe}^{2+}\) ions
Explanation:
B Both calcium \(\left(\mathrm{Ca}^{2+}\right)\) and magnesium \(\left(\mathrm{Mg}^{2+}\right)\) ions are essential for muscle contraction and nerve impulse transmission. \(\mathrm{Ca}^{2+}\) initiates muscle contraction and is involved in neurotransmitter release, while \(\mathrm{Mg}^{2+}\) promotes muscle relaxation and enzyme activation.
JIPMER-2010
Neural Control and Coordination
284595
Transmission of signals or impulse through a nerve is.
1 Physical phenomenon
2 Chemical phenomenon
3 Physic-chemical phenomenon
4 Mechanical phenomenon
Explanation:
B There are two types of synapse, namely electrical synapse and chemical synapse. Electrical synapse is faster than chemical synapse. Chemical synapse called neurotransmitters. It helps in the transmission of impulses at chemical synapses. Hence, transmission of signals or impulse through a nerve is known as chemical phenomenon.
AMU-1995
Neural Control and Coordination
284598
How do parasympathetic neural signals affect the working of the heart?
1 Reduce both heart rate and cardiac output
2 Heart rate is increased without affecting the cardiac output
3 Both heart rate and cardiac output increase
4 Heart rate decreases but cardiac output increases
Explanation:
A Sympathetic and parasympathetic have opposite function to each other. Sympathetic nerves increase both heart rate and cardiac output, and also strength of ventricular contraction. The sympathetic division blood pressure, and the parasympathetic division decreases it. While, parasympathetic neural signals reduce the rate of heart beat. The speed of conduction of action potential and there by the cardiac output.
284593
In parasympathetic nervous system, which of the following is released ?
1 Epinephrine
2 Norepinephrine
3 Serotonin
4 Acetylcholine
Explanation:
D In parasympathetic nervous system, the neurotransmitter released is acetylcholine. This neurotransmitter binds to specific receptors on target cells, which leads to shows effect such as slowing down heart rate, increasing digestive activity and promoting relaxation.
JIPMER-2010
Neural Control and Coordination
284594
Which of the following is important for muscle contraction and nerve impulse transmission ?
1 \(\mathrm{Ca}^{2+}\) ions
2 \(\mathrm{Mg}^{2+}\) ions
3 \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) ions
4 \(\mathrm{Fe}^{2+}\) ions
Explanation:
B Both calcium \(\left(\mathrm{Ca}^{2+}\right)\) and magnesium \(\left(\mathrm{Mg}^{2+}\right)\) ions are essential for muscle contraction and nerve impulse transmission. \(\mathrm{Ca}^{2+}\) initiates muscle contraction and is involved in neurotransmitter release, while \(\mathrm{Mg}^{2+}\) promotes muscle relaxation and enzyme activation.
JIPMER-2010
Neural Control and Coordination
284595
Transmission of signals or impulse through a nerve is.
1 Physical phenomenon
2 Chemical phenomenon
3 Physic-chemical phenomenon
4 Mechanical phenomenon
Explanation:
B There are two types of synapse, namely electrical synapse and chemical synapse. Electrical synapse is faster than chemical synapse. Chemical synapse called neurotransmitters. It helps in the transmission of impulses at chemical synapses. Hence, transmission of signals or impulse through a nerve is known as chemical phenomenon.
AMU-1995
Neural Control and Coordination
284598
How do parasympathetic neural signals affect the working of the heart?
1 Reduce both heart rate and cardiac output
2 Heart rate is increased without affecting the cardiac output
3 Both heart rate and cardiac output increase
4 Heart rate decreases but cardiac output increases
Explanation:
A Sympathetic and parasympathetic have opposite function to each other. Sympathetic nerves increase both heart rate and cardiac output, and also strength of ventricular contraction. The sympathetic division blood pressure, and the parasympathetic division decreases it. While, parasympathetic neural signals reduce the rate of heart beat. The speed of conduction of action potential and there by the cardiac output.