BIOLOGICAL BASES OF BEHAVIOR
THE NERVOUS AND ENDOCRINE SYSTEMS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
By releasing neurotransmitters at neuromuscular junctions.
|
|
|
By combining actin and myosin into an actinomyosin complex.
|
|
|
By reversing the post synaptic potential at the neuromuscular junction.
|
|
|
By releasing Ca2+ ions that are needed for breaking down ATP.
|
Detailed explanation-1: -At the neuromuscular junction, the nerve fiber is able to transmit a signal to the muscle fiber by releasing ACh (and other substances), causing muscle contraction.
Detailed explanation-2: -The motor neurons release a chemical, which is picked up by the muscle fibre. This tells the muscle fibre to contract, which makes the muscles move. Neurons carry messages from the brain via the spinal cord.
Detailed explanation-3: -Presynaptic terminals of neuromuscular junctions contain and release glutamate that contribute to the regulation of synaptic neurotransmission through its interaction with pre-and post-synaptic receptors activating downstream signaling pathways that tune synaptic efficacy and plasticity.
Detailed explanation-4: -Motor neurons are covered with ion channels, which open in response to electrical signals from the brain. Once these ion channels are open, a series of cascading reactions allows the signal to reach the skeletal muscle cells, which ultimately results in muscle contraction.
Detailed explanation-5: -Key facts: action potential and synapses At the junction between two neurons (synapse), an action potential causes neuron A to release a chemical neurotransmitter.