External intercostals. Internal intercostals. External abdominal oblique. Internal abdominal oblique Transversus abdominis Rectus abdominis. Diaphragm. Internal intercostals. External abdominal oblique. Internal abdominal oblique Transversus abdominis Rectus abdominis. â  Figure 16.14 The muscles involved in breathing. The principal muscles of inspiration are shown on the left, and those of expiration are shown on the right.
Definition: An Arrhenius base is a substance that when added to water increases the number of OH-ions in the water.Arrhenius bases follow the reaction:efinition: An Arrhenius base is a substance that when added to water increases the number of OH-ions in the water.
According to Svante Arrhenius acids are compounds which, when dissolved in water produce hydrogen ions (H +), bases are compounds which, when dissolved in water produce hydroxide ions (OH -).The strength of an acid or a base is the relative number of hydroxide and hydrogen ions measured by the pH scale.Thus, the pH is âthe negative of the common logarithm of the hydronium ion concentration of a solutionâ [(6), p.485].Acids described by Arrhenius are ionizable hydrogen atoms which when combined with water form a hydronium ion (H 3 O +). In aqueous solutions all hydrogen ions are hydronium ions.hus, the pH is âthe negative of the common logarithm of the hydronium ion concentration of a solutionâ [(6), p.485]. Acids described by Arrhenius are ionizable hydrogen atoms which when combined with water form a hydronium ion (H 3 O +). In aqueous solutions all hydrogen ions are hydronium ions.