Ions are atoms which have a missing electron or an extra one. This is what gives the ion its positive or negative electrical charge. Isotopes are atoms which contain a different number of neutrons.
Answer:
80 mm Hg
Explanation:
Immediately prior to ventricular systole, pressure in the aorta is about 80 mm Hg. This can be explained by the Frank-Starling Law which states that the stroke volume of the left ventricle will increase as the left ventricular volume increases due to the myocyte stretch which tends to cause a more forceful systolic contraction. This applies in the case that all of the other factors remain the same during that time.
Answer:
Facilitate diffusion describes the movement of glucose into the cell using Glut-4 transporters.
Explanation:
Glut-4 transporter benolgs the family of carrier proteins that helps in the uptake of glucose by the cell mediated by the action of insulin hormone.
The binding of insuin to its receptors signals the movement of glut-4 transporter from the interior of the cell to cell surface.After reaching the cell surface glut-4 proteins binds to the glucose molecule and then undergo Conformational change to deliver those glucose molecules inside the target cell.
The four parts of evolution are variation, inheritance, selection, and time.
The three ingredients of natural selection are variation, consequences, and heritability.
Explanation:
Parts of evolution:
- Variation denotes the uniqueness in genetic makeup which leads to physical differences among different species and within species. Like in a species of butterflies, variations in body size, color, feathers can be observed.
- Inheritance refers to the genetic material passed from the parents to the offsprings. These are specific phenotypes like color of skin or hair, shape of nose etc.
- Selection includes inheritance and acquiring of certain phenotypes to adapt and survive better, reproduce offsprings. These new offsprings in turn produce new offspring with those phenotypes and result in the entire population.
- Time decides about the various changes and adaptations in species. Certain evolutions like that of whale happened millions of years ago; however, the numerous viruses have evolved recently.
In natural selection,
- Variation is the change in the individual traits.
- Consequences are adaptation of certain traits by individuals which makes them to be better to survive and reproduce
- Heritability refers to the resemblance of the offspring to their parents.
