Arrange the following list of biochemical events in the corr

Arrange the following list of biochemical events in the correct sequence.

A) Cross-Bridge bends slightly, pulling on the Actin Filament

B) An impulse is conducted along the sarcolemma and then deep into the muscle fiber by the T tubule

C) The Calcium Pump quickly begins moving Calcium ions back into the Sarcoplasmic Reticulum

D) Acetylcholine, stored in synaptic vesicles is released into the synaptic cleft and diffuses across it

E) The sarcoplasmic reticulum releases calcium ions which diffuse into the sarcoplasm around the myofibril and bind to troponin

F) Myosin cross bridges bind to Actin

G) Sarcomere shortens and skeletal muscle fiber contracts

H) The troponin-tropomyosin complex moves exposing active sites on Actin

I) A motor neuron transmits an impulse down its axon to its terminal end

J) Acetylcholine binds to Receptors (Proteins) on the Sarcolemma at the Motor End Plate

K) Skeletal muscle fiber relaxes

L) Acetylcholinesterase decomposes Acetylcholine at the neuromuscular junction

Solution

correct sequence:-

(L)Acetylcholineesterase decomposes Acetylcholine at the neauromuscular junction.

(K)Skeletal muscle fiber relaxes

(A)Cross-Bridge bend slightly,pulling on the Actin Filament

(F)Myosin cross bridges bind to Actin

(G)Sacromere shortens ans skeletal muscle fiber contrasts

(D)Acetylcholine,stored in synaptic vescicles is released into synaptic cleft and diffuses across it

(C)The calcium pump quickly begins moving calcium ions back into the sacroplasmic Reticulum

(J)Acetylcholin binds to receptors(proteins) on the sarcolemma at the motor end plate

(L)Acetylcholinesterase decomposes Acetylcholine at the neuromuscular juntion

(B)An impulse is conducted along the sarcolemma and then deep into the muscle fiber by the T-tubule

(E)The sarcoplasmic reticulum releases calcium ions which diffuse into the sarcoplasm around the myofibril and bind to troponin

(H)The troponin-tropomyosin complex moves exposing active sites on Actin

Explanation:-

The motor neurons stimulate the muscle cells to contract at neuromuscular juction.The motor neuron then transmits an impulse and the skeletal muscle fibers relaxes or contracts.Then the cross bidge is bent and attached to the Actin filament by pulling it.Later the Myosin cross bidges bind to Actin.The action of sacromere is to shorten and as a result the muscle fibers contrast.The synaptic vesciciles contains Acetylcholine which is released into the synaptic cleft and diffuses across it.The calcium pumps quickly begins moving calcium ions back into the Sacroplasmic reticulum Where the Acetylcholine binds to receptors on the sarcolemma at the motor end plate.The Acetylcholine is decomposed by Acetylcholinesterase at neauromuscular junction.The Sarcoplasmic reticulum releases calcium ions which diffuse into the sarcoplasm around the myofibril and bind to troponin.