Answer:
Nucleus
Explanation:
I know this I've learnt it just today lol. Red Blood Cells don't have a nucleus.
Cell wall is the outer permeable covering in all pants and almost all prokaryotes ! cell wall are mainly made up of cellulose , sometime by chitin!!
<span>one limitation of the linnaean classification system is that it
based on physical characteristics alone</span>
Glomerular filtration describe the movement of substances from the filtrate to the peritubular capillaries.
Glomerular filtration is filtration of the filtrate from the fine capillaries of the glomerulus which filters out large molecules and proteins to stay in the blood vessel allowing water, smaller molecules, waste and fluid to pass through. The passed out molecules and water is then passed into Peritubular capillaries.
A Glomerular filtration rate (GFR) of greater than 60mm hg or equal to it is considered normal.
It is also an important parameter which determines how well the kidney is working in the body.
Glomerular filtration is the first step of the filtration of the blood which produces urine by passing through the wine capillaries of the blood.
GFR is affected by the BMI, age and gender of the human body.
The capacity of absorption of salt and water is determined by the GFR.
Learn more about Glomerulus here, brainly.com/question/1560706
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Answer:
"As a molecule moves through the plasma membrane it passes through <em>a hydrophilic layer of phospholipid heads then a hydrophobic layer of phospholipid tails and then another hydrophilic layer of phospholipid heads".</em>
Explanation:
Biological membranes are formed by two lipidic layers, proteins, and glucans.
Lipids characterize for being amphipathic molecules, which means that they have both a hydrophilic portion and a hydrophobic portion at the same time. These molecules have a lipidic head that corresponds to a negatively charged phosphate group, which is the polar and hydrophilic portion. They also have two lipidic tails that correspond to the hydrocarbon chains -the apolar and hydrophobic portion- of the fatty acids that esterify glycerol.
Membrane lipids are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells, while their hydrophobic tails are against each other, constituting the internal part of the membrane.
Through this lipidic bilayer, some molecules can move from one side of the cell to the other, which happens because of concentration differences. When this occurs, molecules must pass through the hydrophilic layer of phospholipid heads then through the hydrophobic layer of phospholipid tails and then again through another hydrophilic layer of phospholipid heads.