Explanation:
<em><u>A substance that enters into and is altered in the course of a chemical reaction.</u></em>
<em><u>hope </u></em><em><u>are </u></em><em><u>you </u></em><em><u>understand</u></em>
Bacitracin blocks the transport of nag and nam across the cytoplasmic membrane to the cell wall. Like other antimicrobials that block cell wall synthesis, this would result in weak cell walls and cell lysis. Antimicrobilas that act by inhibiting cell wall synthesis include beta-lactams, vancomycin and cycloserine and isoniazid and ethambutol among others. They prevent bacteria from increasing amount of peptidoglycan, they have no effect on existing peptodoglycan layer and therefore are effective only for growing cells.
To signal hunger, the physiological need for food, the digestive tract sends messages to the hypothalamus by way of hormones and nerves.
Peristalsis refers to the action of the involuntary muscle of the digestive track
Peristalsis involve a series of wave like muscle contraction that moves food to different processing station in the digestive tracts and it begins in the esophagus when bolus of food is swallowed. It involve involuntary movement of the longitudinal and circular muscle.
