Table of Contents
Which of the following neurotransmitters triggers contractions of skeletal muscle?
acetylcholine
The answer is acetylcholine .
What hormone causes contraction of the muscles?
Oxytocin stimulates the uterine muscles to contract and also increases production of prostaglandins, which increase the contractions further. Manufactured oxytocin is sometimes given to induce labour if it has not started naturally or it can be used to strengthen contractions to aid childbirth.
What is the main neurotransmitter in skeletal muscle?
In the peripheral nervous system, ACh is the neurotransmitter at the neuromuscular junction between the motor nerve and skeletal muscle.
What hormone stimulates smooth muscle contractions?
Oxytocin stimulates contraction of myoepithelial cells, causing milk to be ejected into the ducts and cisterns. Stimulation of uterine smooth muscle contraction at birth: At the end of gestation, the uterus must contract vigorously and for a prolonged period of time in order to deliver the fetus.
What does epinephrine and norepinephrine do?
Epinephrine and norepinephrine are similar chemicals that act as both neurotransmitters and hormones in the body. Both substances play an important role in the body’s fight or flight response, and their release into the bloodstream causes increased blood pressure, heart rate, and blood sugar levels.
What is the neurotransmitter that causes muscle to contract?
Acetylcholine is the neurotransmitter by which nerves cause muscle cells to contract, and thus it is crucial for all voluntary movement of the limbs and any of the body parts controlled by skeletal muscle.
How does the nerve impulse cause contraction of the muscle?
A nerve impulse, arriving at the junction causes the release of acetylcholine which affects the muscle membrane. Ions are allowed to pass in and out in much the same way as in nerve cells and the current set up triggers the contractile mechanism in the muscle fiber. Again the response is “all or nothing”.
What is the neurotransmitter necessary for skeletal muscle?
Acetylcholine is a chemical messenger, a neurotransmitter, released by nerve cells in many parts of the peripheral nervous system. It controls the contraction of all skeletal or voluntary muscles, for instance. It also affects the contraction of smooth and cardiac muscle.
What neurotransmitter causes pain?
Although the exact mechanisms behind many types of chronic pain are not yet fully understood, pain is associated with imbalances of neurotransmitters. These include inhibitory neurotransmitters serotonin and GABA, as well as excitatory neurotransmitters dopamine and norepinephrine.