In normal skeletal muscle tissue, binding of acetylcholine to its receptors at the neuromuscular junction results in:

1 answer:

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<span>Answer: Opening of Na+ and K+ Explanation: Acetycholine binding opens Na+ and K+ ion channels in the receptors that allow simultaneous passage of Naâş into the muscle fiber and Kâş out of the muscle fiber. More Naâş ions enter than Kâş ions exit, which produces a local change in the membrane potential called the end plate potential. Binding of acetycholine to receptor proteins opens Na+ and K+ channels resulting in jump in resting membrane potential(RMP) from -90mV to +75mV forming an end-plate potential (EPP).</span>

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In addition to helping the environment, renewable resources—such as solar power and hydroelectricity—may also provide an economi

Jobisdone [24]

Answer:

Option A

Explanation:

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Hence, option A is correct.

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What phenotypic ratio would you expect as a result of a test cross between a dihybrid organism and one that is homozygous recess

Artyom0805 [142]

Answer:

¼ or 25% will be dihybrid organisms, ¼ will be heterozygous at first locus and recessive homozygous at other locus , ¼ of them will be recessive homozygous at first locus and heterozygous at other locus, and ¼ of them will be homozygous recessive for alleles at two independent loci.

Explanation:

A dihybrid organism is one that is heterozygous at two different genetic loci. So if we name one gene with D and other gene with R, dihybrid organism will have genotype DdRr.

If we cross that organism with the one that is homozygous recessive for alleles at two independent loci ddrr:

P: DdRr x ddrr