Answer:
The correct answer is -
the independent variable - if fertilizer added or not,
the dependant variable - the height of the plant and
the standardized variable - 200ml water
Explanation:
In this study, the student wanted to see the effect of the fertilizer on the growth of the plant so the independent variable is the treatment of the fertilizer as manipulated or the independent variable is the factor which is affected or changed purposely during an experiment while other variables remain constant.
The dependent variable is the factor that is based or depends on the independent variable and measured to see the effect which is the height of the plants in this case.
The standardized or the control variable is the variable that remains constant throughout the experiment, 200 ml water treatment is the control variable in this experiment.
Answer:
depolarization leading to action potentials
Explanation:
The voltage-gated Na+ channels are responsible for rapid depolarization phase of the action potential. Action potential generation require depolarization of neuronal membrane which is acquired by influx of sodium ions through voltage gated sodium ion channels. If the Na+ channels are blocked, there will be no influx of sodium ions to cause depolarization hence action potential will not be generated.
Answer:
When red blood cells are placed inside pure water they normally swell up and eventually explode. Red blood cells in pure water swell up because the pure water enter in the red blood cells by mean of osmosis. The water molecules are able to enter the red blood cells because the salt concentration inside the red blood cells is more than that of the pure water.
As water continue to move inside the cells, the cell swell up and eventually burst because the internal pressure inside the cell is greater than the external pressure, therefore the cell membrane become ruptured and eventually burst.
Answer: Red blood cell count is a diagnostic blood test used to determine the amount of red blood cells an individual has.
Percentage of reticulocytes refers to the amount of immature red blood cells one has.
Hemoglobin is the protein component of red blood cells responsible for carrying oxygen.
Hematocrit is the proportion of red blood cells in the total volume of blood.
Mean corpuscular volume refers to the mean volume of red cells within an organism.
Mean corpuscular hemoglobin concentration refers the intracellular hemoglobin count.
Explanation: Anemia is a condition that is characterized by a reduced total hemoglobin count or number of red blood cells. Anemia can be classified according to various factors that include pathophysiology, that is the factors surrounding the onset of the condition or by cell size, which refers to mean corpuscular volume (MCV) or by the amount hemoglobin, which is referred to as the mean corpuscular hemoglobin (MCH). The diagnosis of anemia is dependent on red blood cell counts which encompass reticulocyte, platelets and leukocyte counts. Critical blood counts that look at MCV and MCH are a disgnostic feature for the various types of the condition. A high reticulocytes percentage is often associated with anemia.
Studying cells helps us to construct better medicines and vaccines, which is beneficial to understanding life.
