The functions of which cell structure are described in this list?

a. the plasma membrane

b. a mitochondria

c. a lysosome

d. the endoplasmic reticulum

Eukaryotic Cell organelles

Explanation:

A .Plasma membrane:It is made up of phospholipid bilayer with embeded proteins.It protects the various cellular organelles from its exterior envirnnmentt.It is selectively permeable in nature..Due to its nature,the organic molecules,oxygen,water,other nutrients moves in and out through this membrane.The waste materials such CO2 and NH3 exits from this passage.

B. A Mitochondira.It is often called as the energy reservoir of a cell..Its a site of cellular  respiration.In Eukaryotes the respiratory pathways are either aerobic or anaerobic respiration depends upon the nature of a species.The number of mitochondria varies depends the energy requirements to a cell.The mitochondria is membrane bound organelle double inner and outer membrane.These layers are made up of phospholipid bilayers and proteins.The inner is folded called cristae.The regions within the cristae is called mitochondrial matrix here the citric acid cycle .Krebs cycle,glycolysis takes place In over all cycles 38 ATP is generated.

C.A lysosomes: It is absent in plant cells but present in animals cell also termed as waste disposal. Enzymes of lysosomes helps in the breakdown of proteins ,lipids  ,polysaccharides ,nucleic acids and damaged organelles.The lysosomes breaks down macromolecules and contains plenty of enzymes.

D.Endoplasmic reticulum: It’s a flattened sac like structure within the cytoplasm of a cell. It performs various functions but more specifically it synthesizes and modifies and transport proteins. There are two types of ER rough Er and smoothER .The RER synthesize proteins transports by the ribosomes.and the SER synthesize lipids.

If you meant muscular system instead of modular system, then they function by working together.

The skeletal system offers structure & a place for the muscles to grab onto. Without a frame for the muscles to attach and pull on, we could not be able to move.

Imagine if we didn't have bones, we'd be an awkward sack of skin, muscle and bodily fluids & we would probably have to wiggle like worms to move. Thankfully, we don't have to worry about that!

Hope this was helpful!