The difference would be that impervious structures and surfaces generally do not allow molecules and compound to be transferred across. It is generally impossible to get something through an impervious surface. This isn't true, however, for pervious surfaces.
Student A is correct in the definition and purpose of translation.
17 - True, neurons are the most significant or basic unit for transferring nervous signals throughout the body. Nerves which are linked act as wires for connection. The brain wouldn't be able to send or receive signals if there were no neurons
18 - False, hormones are just chemical molecules or messengers that are sent towards tissues or organs through the bloodstream to help regulate the growth or metabolism through homeostasis process
19 - True, axons are the longest part of a neuron which helps for neurotransmission process throughout the whole nerve to the end of the motor neuron
From the options, the true statements about glycocalyx are : ( 1 ) and ( 3 )
- All animal cell have a glycocalyx ( 1 )
- The glycocalyx helps one cell adhere to another ( 3 )
Glycocalyx is a layer of macromolecules attached to the cell membrane of cells. they perform several functions like protecting the cell from the entrance of pathogens and also providing a medium for cell to cell interaction.
Glycocalyx are found in cells of living organisms, and they are made up of glycosaminoglycans, proteoglycans and glycoproteins as well. hence they are not comprised mostly of proteins.
Hence we can conclude that the true statements about glycocalyx are : All animal cell have a glycocalyx and the glycocalyx helps one cell adhere to another
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