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Explain in short detail; Transport Nutrients (including O2), wastes ( including CO2), hormones, stem cells, heart. Regulation pH homeostasis and the body fluid distribution. Protection, body defense and immunity. Every cell need nutrient for transport in the circulatory system.

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Sixta Kovacek
Sixta KovacekLv2
28 Sep 2019

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Related questions

Explain why cells need to receive nutrients (explain what nutrientsare and give examples)
Explain why cells need to receive and send messages (brieflyexplain how cells of the body communicate and why it is importantfor cells to communicate).
Explain why cells need to get rid of wastes (For example: CO2 is aby-product of cell respiration. In cell respiration cells breakapart glucose so they can build ATP, the fuel cells need to do cellwork and CO2 is a by-product. Too much CO2 causes body fluids tobecome acidic. Acidic means that there is a high level of reactiveprotons (H+) and this can interfere with the normal chemicalreactions that cells need to carry out).

Transferrin, also known as TF, is an iron binding blood plasma glycoprotien, which controls the level of free iron in biological fluids. In humans, TF consists of a single polypeptide chain containing 679 amino acids and has a molecular weigh of about 76,500 Daltons. The protein is composed of both alpha helices and beta pleated sheet. liver is the main site of TF synthesis but other tissue and organs, including the brian, also produce this protein which is secreted by cells for transport via the circulatory system. the main role of TF is transport iron from the small intestine to all reproducing cell in the body. TF plays a key role in areas where red blood cell production and active cell divsion occur.

Is this protein synthesized by bound or free ribsome? Explain your answer.

3. In an aqueous environment, the phospholipids of a membrane____.

a) are arranged in a single layer

b) are arranged in a bilayer with the polar heads of each layerlocated at the surface

c) are arranged in a bilayer with the fatty acid tails locatedat the surface

d) are arranged in a bilayer but the phospholipids have nospecific orientation

e) dissolve

4. which of the following molecules demonstrate dual solubilitycharacteristics

a) sterols only

b) proteins only

c) phospholipids only

d) sterols and phospholipids

e) sterols, phospholipids, and proteins

5. The "mosaic" part of the fluid mosaic model refers to themembrane ____.

a) proteins

b) phospholipids

c) cholesterol

d) functions

e) layers

9. Transport of a molecule across a cell membrane by facilitateddiffusion ____.

a) does not exhibit specificity for a particular type ofmolecule

b) requires the input of energy

c) depends on a concentration gradient

d) goes against the concentration gradient

e) allows non-polar uncharged molecules to diffuse across amembrane

13. A transport system in which transport of an ion in onedirection provides the energy for active transport in the oppositedirection is known as ____.

a) primary active transport

b) active diffusion

c) secondary active transport

d) cotransport

e) osmosis

14. Cells undergo exocytosis ____.

a) to pump protons down a concentration gradient

b) when replicating

c) to secrete protein and wastes from the cell

d) to ingest nutrients

e) as a means of cellular protection

15. What is the molecular basis of familialhypercholestremia?

a) HDL enters cells using a specific receptor on the cellsurface

b) LDL enters cells using a specific receptor on the cellsurface

c) HDL exits cells using a specific receptor on the cellsurface

d) LDL exits cells using a specific receptor on the cellsurface

e) receptor-mediated exocytosis

16. Carrier molecules are utilized for ____.

a) active transport only

b) passive transport only

c) both active and passive transport

d) osmosis

e) transport of all types of molecules

17. All of the following are functions of integral membraneproteins EXCEPT ____.

a) transport of polar molecules

b) reception of chemical signals form other cells

c) cell division

d) recognition of other cells as being "like"

e) cell-cell binding

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