What is the smallest functional unit of skeletal
muscle? Explain why it is the smallest
functional unit and what happens to it during muscle
contraction.
What is the smallest functional unit of skeletal muscle? Explain why it is the smallest functional...
Why are there different types of skeletal muscle phenotypes, and what are the functional/physiological differences between them?
7. Electrical and contractile events of muscle are related, and their timing is sequential. Explain these pictures - what happens during the lag? Twitch Omv- action potential Skeletal -90 mV contraction cardiac - relaxation phase contraction phase delay Action potential teau phase Muscle contraction Muscle contraction MV or muscle contraction MV or musde contraction 100 300 100 200 200 Time (ma) Time (ma)
Question 50 1 pts What happens during a tetanic contraction in skeletal muscle? Twitches sum together, creating a strong contraction Action potentials sum together, leading to a strong contraction The muscle is stretched and reflexively contracts strongly Ca2+ influxes in SR, which leads to a strong contraction Question 49 1 pts In smooth muscle, phosphorylation of leads to contraction. Dihydropyradine Receptor Tropomyosin Myosin light chain Calmodulin O Troponin
Question Completion Status: QUESTION 2 Different in smooth muscle compared to skeletal muscle a. Sarcoplasm reticulum is missing b .calcium is not required c. Sarcoplasm reticulum is less developed d. sarcolemma is missing QUESTION 3 Magnesium plays key role in deep tissue contraction, answer true false for this question a. true b. false c.not sure de silly question QUESTION 4 Clear evidence of sarcomere (when looking under microscope) in a. Cardiac muscle smooth muscle skeletal muscled . A and QUESTIONS...
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?
(a) Explain the physiological mechanism of excitation-contraction coupling in skeletal muscle. (b) Draw links between excitation-contraction coupling, EMG, and dynamometry.
EXERCISE 10 REVIEW QUESTIONS Introduction to Skeletal Muscle 1. What is the structural basis for the alternating light and dark striations in skeletal muscle fibers! 2. Describe the band(s). line(s), androne() that are found in a single sarcomer QUESTIONS 3-9: Identify the labeled structures in the following diagram. EXERCISE 10 Introduction to Skeletal Muscle 16 w the two figures below and compare the condition of the sarcomere at rest and after contraction Sarcomere at rest i band A band (b)...
What is the name of the functional contracting unit of the muscle?
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
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...