One neuron stimulates a skeletal muscle: what does it happen at the neuron termination? 2. And...
One neuron stimulates a skeletal muscle: what does it happen at the neuron termination? 2. And what does it happen in the muscle from the arrival of the stimulus up to the contraction
Homework Answers
1. Arrival of action potential to axon terminal stimulate openin of calcium channel. This causes influx of calcium ion. Calcium binds to synaptic vesicle and this leads to fusion of synaptic vesicle to axon terminal membrane. This leads to release of neurotransmitter (Acetylcholine) in synaptic cleft.
2. Acetylcholine binds to its receptor on motor end plate. This leads to depolarisation of motor end plate. This leads to influx of calcium ion within muscle cell. Calcium now binds to troponin and this causes displacement of tropomyosin from active site of actin. Myosin now bind to active site of actin by utilisation of ATP, this leads to cross bridge formation (between actin and myosin). This leads to muscle contraction.
If you found this answer helpful then please rate it. Comment if you have any problems in understanding this answer.
Add Answer to:
One neuron stimulates a skeletal muscle: what does it happen at
the neuron termination? 2. And...
True or False: The striations in skeletal muscle are formed by the arrangement of thick and...
True or False: The striations in skeletal muscle are formed by the arrangement of thick and thin filaments. 2. True or False: In skeletal muscle cells, the sarcoplasmic reticulum is continuous with the sarcolemma. 3. The interval between two Z lines is called a ________________. 4. At a neuromuscular junction, the space between the plasma membrane of the synaptic terminal and the motor end plate is the __________________. 5. An action potential (electric impulse) is transferred from a...
what is the energy source used for muscle contraction? how does recruitment of motor units work?...
what is the energy source used for muscle contraction? how does recruitment of motor units work? do all muscle fibers in a motor unit contract every time the somatic motor neuron stimulates it?
Question 16 (1 point) What is the best description of a tetanic contraction in a skeletal...
Question 16 (1 point) What is the best description of a tetanic contraction in a skeletal muscle cell? A single action potential in the motor neuron causes a sustained contraction Multiple action potentials in the motor neuron cause a sustained contraction. The action potential in the muscle cell is prolonged to last as long as the contraction Repeated action potentials from the motor neuron summate into a sustained depolarization of the motor end plate, causing a sustained contraction ( A...
Neuron Signaling and Muscle Contraction 1) “Dissect” the various parts of an action potential by describing...
Neuron Signaling and Muscle Contraction 1) “Dissect” the various parts of an action potential by describing the status (active or nonactive) of the voltage-gated sodium channel, voltage-gated potassium channel, sodium/potassium pump, and overall voltage and/ or voltage range (in millivolts, or mV) for each of the following. A) Resting membrane (prior to the initiation of an action potential) B) just before threshold to just after threshold (Depolarization) C) Rising phase of the action potential D) Falling phase of the action...
homwork help The average skeletal muscle cell's latent period is ___ the contraction/relaxation phase. o A...
homwork help
The average skeletal muscle cell's latent period is ___ the contraction/relaxation phase. o A much shorter than o B about as long as O C much longer than Unanswered Question 49 The latent period represents A the phase of crossbridge formation 0 B the phase of calcium re-uptake by the SR the delay between action potential stimulus arrival and calcium release from the SR D the phase of myosin head release from the actin filament
11. The figure below shows tension recorded in two different skeletal muscles: a control (solid line), and one that was...
11. The figure below shows tension recorded in two different skeletal muscles: a control (solid line), and one that was injected with caffeine (dashed line). Arrows show the arrival of action s loc potentials at both muscles ming of stimulus, contraction and relaxation phases are the same). We know that caffeine n channels. Based on this data, please identify which ion channels are affected, explain why tension builds faster in the injected muscle, and identify the mechanism used to build...
Question 60 2 out of 2 points The neurotransmitter that produces muscle contraction in skeletal muscle...
Question 60 2 out of 2 points The neurotransmitter that produces muscle contraction in skeletal muscle is In cardiac muscle, the calcium required for muscle contraction primarily comes from the sarcoplasmic reticulum. Question 712 out of 2 points The three tunics of the eye are
13. During skeletal musele contraction, whet substance does the sarcoplasmic reticulum store and release? A. acetyicholine...
13. During skeletal musele contraction, whet substance does the sarcoplasmic reticulum store and release? A. acetyicholine B. sodium D. calcium 34. What stimalates the sarcoplasmic reticulum (SR) to release this chemical? A. the voltage change from the muscular action potential traveling down the transverse (1) tubules B. the binding of acetylcholine to ligand-gated channels in the transverse tubules C. direct stimulus from the neural action potential D, the binding of myosin to actin 35. Transverse (T) tubales are extensions of...
In experimental situations, how does skeletal muscle length determine the force of contraction? Why, in life,...
In experimental situations, how does skeletal muscle length determine the force of contraction? Why, in life, is this muscle length versus active tension relationship not seen?
Question 23 of 35 > Select the statement that describes recruitment in muscle contraction. More motor...
Question 23 of 35 > Select the statement that describes recruitment in muscle contraction. More motor neurons and larger motor units are activated to stimulate a greater number of muscle fibers for a stronger muscle contraction. Neurotransmitters from the synaptic terminal of a motor neuron stimulate an action potential in the muscle fiber. O An increasing number of motor neurons are connected to the muscle fiber as a muscle grows and becomes stronger. The contraction of muscle fibers in one...
Question 16 (1 point) What is the best description of a tetanic contraction in a skeletal muscle cell? A single action potential in the motor neuron causes a sustained contraction Multiple action potentials in the motor neuron cause a sustained contraction. The action potential in the muscle cell is prolonged to last as long as the contraction Repeated action potentials from the motor neuron summate into a sustained depolarization of the motor end plate, causing a sustained contraction ( A...
homwork help
The average skeletal muscle cell's latent period is ___ the contraction/relaxation phase. o A much shorter than o B about as long as O C much longer than Unanswered Question 49 The latent period represents A the phase of crossbridge formation 0 B the phase of calcium re-uptake by the SR the delay between action potential stimulus arrival and calcium release from the SR D the phase of myosin head release from the actin filament
11. The figure below shows tension recorded in two different skeletal muscles: a control (solid line), and one that was injected with caffeine (dashed line). Arrows show the arrival of action s loc potentials at both muscles ming of stimulus, contraction and relaxation phases are the same). We know that caffeine n channels. Based on this data, please identify which ion channels are affected, explain why tension builds faster in the injected muscle, and identify the mechanism used to build...
Question 60 2 out of 2 points The neurotransmitter that produces muscle contraction in skeletal muscle is In cardiac muscle, the calcium required for muscle contraction primarily comes from the sarcoplasmic reticulum. Question 712 out of 2 points The three tunics of the eye are
13. During skeletal musele contraction, whet substance does the sarcoplasmic reticulum store and release? A. acetyicholine B. sodium D. calcium 34. What stimalates the sarcoplasmic reticulum (SR) to release this chemical? A. the voltage change from the muscular action potential traveling down the transverse (1) tubules B. the binding of acetylcholine to ligand-gated channels in the transverse tubules C. direct stimulus from the neural action potential D, the binding of myosin to actin 35. Transverse (T) tubales are extensions of...
Question 23 of 35 > Select the statement that describes recruitment in muscle contraction. More motor neurons and larger motor units are activated to stimulate a greater number of muscle fibers for a stronger muscle contraction. Neurotransmitters from the synaptic terminal of a motor neuron stimulate an action potential in the muscle fiber. O An increasing number of motor neurons are connected to the muscle fiber as a muscle grows and becomes stronger. The contraction of muscle fibers in one...
Most questions answered within 3 hours.
-
Would the color red look different if you were immersed in water
rather than in air?
asked 2 minutes ago -
A steel piping is to be produced by centrifugal casting. The
length is 3.5 meters and...
asked 5 minutes ago -
3...
The following information was taken from Indriks Company’s cash
budget for the month of July:...
asked 17 minutes ago -
Country Company had the following partially completed payroll
register:
Partial payroll register:
Earnings
Withholdings
Salaries
Beginning...
asked 21 minutes ago -
I
have to separate 5 ions into 5 different test tubes
-> I CAN’T MAKE THE...
asked 31 minutes ago -
Juanita took a business trip from Houston to New York. She
worked for 4 days, then...
asked 30 minutes ago -
4. If we had
assumed the q for the calorimeter to be zero, would this have...
asked 39 minutes ago -
The following table reports real income per person for several
different economies in the years 1960...
asked 37 minutes ago -
Since the Great Recession, the trade deficit has been
decreasing
staying about the same
increasing
none...
asked 37 minutes ago -
A rigid tank contains 1.60 moles of an ideal gas. Determine the
number of moles of...
asked 41 minutes ago -
There are four different math books, six statistics and two
physics books which should be accommodated...
asked 57 minutes ago -
QUESTION 17
The Age Discrimination in Employment Act prohibits specific
employers from discriminating against persons who...
asked 57 minutes ago