Biology, 07.12.2021 03:50 mommer2019
The relaxation of skeletal muscle fibers and the skeletal muscle, itself, begins with the motor neuron, which stops releasing its chemical signal, ACh, into the synapse at the neuromuscular junction. The muscle fiber will repolarize. What is the next step in relaxation? A) The actin-binding sites on the thin filaments are reshielded. B) ATP-driven pumps move Ca++ out of the sarcoplasmic reticulum. C) Troponin and tropomyosin revert back to their original positions on the actin fibers. D) The gates in the sarcoplasmic reticulum where Ca++ was being released are closed.
Answers: 3
Biology, 22.06.2019 08:30
Which of the following is a true statement? a. individuals evolve to have adaptations. b. individuals have adaptations that can change over time. c. individuals have traits that may or may not make them successful at reproduction. d. populations cant evolve, only individual organisms.
Answers: 1
Biology, 22.06.2019 09:20
Match the following items 1. rr 2. rr 3. identical alleles 4. unlike alleles 5. rr ()homozygous, recessive ()homozygous definition ()heterozygous, dominant cell ()heterozygous definition () homozygous, dominant cell
Answers: 2
Biology, 23.06.2019 00:30
Npiranha, fish with large teeth represent the dominant trait. because the dominant trait masks the recessive trait, in a population of 1,000 piranhas, all with large teeth, we could expect about the next generation of fish to have small teeth.
Answers: 1
Biology, 23.06.2019 01:30
After dinner with his brother, charles darwin looked through a book by thomas robert malthus, who believed that humanity, if unchecked, could double its population size in 25 years . why then , wasn't the earth overrun with humans at this point ? how does this relate to the stoning of the darwin's carriage?
Answers: 1
The relaxation of skeletal muscle fibers and the skeletal muscle, itself, begins with the motor neur...
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