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What is the first phase after a stimulus in a muscle contraction?
The first phase after a stimulus in a muscle contraction is excitation-contraction coupling. This involves the transmission of the action potential along the sarcolemma and the release of calcium ions from the sarcoplasmic reticulum.
Do all cardiac muscle fibers all contract at the same time?
No. The heart muscle contracts in sections, first the top (atrium) then the bottom (ventricle). But when it is working properly, the heart muscle fibers contract together in large groups.
What result would be expected if an additional stimulus equal in intensity to the first were applied to the muscle at the 60 millisecond time point?
the muscle would increase in tension to a level greater than that measured at the beginning of phase C.
What came first a stimulus or a response?
A stimulus comes first before a response. A stimulus is any event or situation that evokes a response from an organism. The response is the reaction or behavior that is produced in reaction to the stimulus.
What are 3 physical changes that take place when a skeletal muscle contracts?
When a skeletal muscle contracts, three key physical changes occur: First, the sarcomeres, the basic units of muscle fibers, shorten as the actin and myosin filaments slide past each other. Second, the muscle belly thickens and becomes more rigid due to increased tension. Lastly, there is a noticeable decrease in the overall length of the muscle as it pulls on the bones it is attached to, resulting in joint movement.
What works in pairs to pull your bones in different directions?
They are the muscles. Muscles contract in pairs to move the parts across the joint. One muscle contract with more power. The opposite muscle contracts with less power and get stretched over to allow the first muscle to act.
What works in pairs to pull your your bones in different directions?
They are the muscles. Muscles contract in pairs to move the parts across the joint. One muscle contract with more power. The opposite muscle contracts with less power and get stretched over to allow the first muscle to act.
What body part works in pairs to pull your bones in different directions?
They are the muscles. Muscles contract in pairs to move the parts across the joint. One muscle contract with more power. The opposite muscle contracts with less power and get stretched over to allow the first muscle to act.
What are the very first of the three steps basic to all sensory systems?
1. Recieve stimulus 2. Transform stimulus 3. Deliver stimulus
How many first round NFL draft picks get guaranteed contracts?
No contracts are guaranteed.
What are the first and last elements in a spinal reflex?
The first element in a spinal reflex is the sensory receptor, which detects a stimulus. The last element is the effector, which carries out a response to the stimulus.
Which theory predicts when you will first notice a faint stimulus presented amid competing background stimulation?
Signal detection theory predicts when you will first notice a faint stimulus presented amid competing background stimulation. This theory focuses on the decision-making process involved in detecting a stimulus and takes into account both the sensitivity of the individual to the stimulus and the level of background noise or interference.
