Why does co-contraction (contraction of all motor neurons at the same time) lead to paralysis and not to excessive movement?
Why does co-contraction (contraction of all motor neurons at the same time) lead to paralysis and...
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 3 1 pts Many nerves, for example, motor neurons used in muscle contraction, are wrapped in myelin, a sheath of repeated units of lipid bilayers and proteins. The effect of myelin is to reduce the amount of ions leaking out the membrane, which therefore reduces the degree of amplification of a signal required during de- and repolarization, and, hence, increases the voltage signal speed. With regard to our model circuit, a myelinated axon simply can be represented by an...
7. Are all prokaryotic genes expressed all of the time? Why or why not? How does the cell know which genes to express and when?
1. In the left ventricle, why does isovolumetric (isometric) contraction occur during the first phase of ventricular systole? A. The bicuspid valve needs time to sit before the ventricle can eject blood. B. Ventricular pressure is greater than atrial pressure so the ventricle cannot eject blood. C. The ventricle is still filling with blood and therefore cannot eject blood during this time. D. Aortic pressure is higher than ventricular pressure and the ventricle must pressurize the blood to open the...
Define the all-or-none principle. (1 mark) The same student remarked that at 180 mV stimulus, it is expected that 100 g mass is lifted by the muscle fibre. Do you agree or disagree? Why or why not? (1 mark) Use the following information to answer the next four questions. Muscle Contraction In an experiment, the strength of a neural stimulus and the resulting muscle contraction are compared. A single motor neuron that synapses with one muscle fibre is observed in...
Not all leaders lead in the same way, and even then a leader may switch leadership styles based on the situation. Identify and describe three different leadership styles. In addition, for each leadership style give a specific example of a situation in which that style is appropriate, and explain why.
Why does the failure to adjust the poverty line for regional differences in living costs lead to an understatement of poverty in some states and an overstatement of poverty in others? please make answer readable as this question has been answered before but I am unable to read the hand writing. Thank you for your time.
by expiremnt when we drop aluminum pin and magnatic pin from the same point. why does the aluminum reaches the ground faster than imagnatic? (hint: it has to do with the net force) Why when we drop A into the tube it goes fast while if we drop B it takes much more time "Explain it"
Why are so few companies able to use adaptation, aggregation, and arbitrage all at the same time? Can you think of a company that uses (or comes close to using these strategies simultaneously)?
Problem 92. A) Why do pulses that enter an optical fiber at the same time but at different angles, exit the fiber at dif- ferent times? B) Would a pulse in an optical fiber spread if the wave speed was the same for all frequency components? Briefly justify your answer. Problem 93. Do some internet research and then answer the following questions. A) What are the carrier frequencies and bandwidths associated with the 802.11ac wireless internet (WiFi) standard? B) What...