Answer:
The correct answer is option A- oligodendrocytes.
Explanation:
The insulation property of the neurons (axons) of the nervous system is provided by the fat-containing cells which wrap around the axons.
This wrapped structure is known as the "myelin sheath" in which fat provides the insulation to the neurons which increases the impulse conduction through neurons. The "oligodendrocytes" present in the CNS forms the myelin sheath which provides insulation to the neurons.
Thus, option A- oligodendrocytes are the correct answer.
Answer:
Calcium
Explanation:
Calcium is an important element present in the organisms body. The calcium can acts as an important messenger molecule and helps in the process of muscle contraction.
The concentration of calcium ions in the myoplasm leads to the development of force necessary for the movement of actin and myosin molecule. The calcium ions cling the cross bridge formation during muscle contraction.
Thus, the correct answer is option (b).
Capillaries. Capillaries absorb oxygen from inhaled air into the bloodstream and release carbon dioxide for exhalation. They are tiny vessels that branch out from arterioles to form networks around body cells.
Answer: During a steady state each ion's driving force is O mv
Explanation:
When a cell is considered to be in steady state it means that the concentration ions and molecules within the cell is constant. As a result, a system at equilibrium is also considered to be at a steady state.
When in steady state, the membrane potential experiences no net change which is why the resting potential is an example of a steady state.
However during a steady state, each ion's driving force is not 0 mv.
Answer:
Tt and tt
Explanation:
Dominant alleles are written with capital letters.
Recessive alleles are written with lowercase letters.
When an allele is <u>dominant</u>, the individual only needs <u>one</u> copy of it in order for the trait it codes to be expressed.
When an allele is <u>recessive</u>, the individual needs to have<u> two </u>copies of it in order for the trait it codes to be expressed.
Given the gene T/t, which determines the ability to taste PTC, there are 3 possible genotypes for a person:
- TT, homozygous taster.
- Tt, heterozygous taster
- tt, homozygous non-taster
The cross between a heterozygous taster with a non-taster would be:
<h2>
Tt x tt</h2>
