Biology, 11.12.2019 17:31 fespinoza019
Which of the following is the correct sequence that describes the excitation and contraction of a skeletal muscle fiber?
1. tropomyosin shifts and unblocks the cross-bridge binding sites.
2. calcium is released and binds to the troponin complex.
3. transverse tubules depolarize the sarcoplasmic reticulum.
4. the thin filaments are ratcheted across the thick filaments by the heads of the myosin molecules using energy from atp.
5. an action potential in a motor neuron causes the axon to release acetylcholine, which depolarizes the muscle cell membrane.
Answers: 2
Biology, 22.06.2019 04:30
This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment
Answers: 1
Biology, 22.06.2019 16:30
Urgent in guinea pigs, black fur (b) is dominant over white fur (b). cross a heterozygous (hybrid) black guinea pig with a homozygous (purebred) white guinea pig. complete a punnett square, identify the genotype(s), phenotype(s), and probability (% and fraction) that the offspring will be black and white?
Answers: 1
Biology, 22.06.2019 17:10
Question 17 (1 point) where does penicillin come from? a. it is a chemical that man invented b. it is a fungus c. it is a toxin made by other bacteria d. it was discovered in archaebacteria
Answers: 1
Which of the following is the correct sequence that describes the excitation and contraction of a sk...
History, 17.07.2019 21:30
Mathematics, 17.07.2019 21:30
History, 17.07.2019 21:30
Mathematics, 17.07.2019 21:30
Physics, 17.07.2019 21:30
Business, 17.07.2019 21:30
Health, 17.07.2019 21:30
Mathematics, 17.07.2019 21:30
Computers and Technology, 17.07.2019 21:30
Mathematics, 17.07.2019 21:30
Chemistry, 17.07.2019 21:30