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- this is the question
the drawing below illustrates a small portion of molecules that make up a cell membrane. what is the primary function of the phospholipidid in the cell membrane?

○ prevent the passage of certain molecules into the cell

Explanation:

Critical components of cell membranes are phospholipid bilayers. The lipid bilayer serves to prevent molecules and ions from entering and leaving the cell.

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answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation:

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.