Intercalated discs and pacemaker cells are characteristic of ________ tissue.

The effects of aging on the skin include 

2.2.4 Michelle en Dawie het toe beker 3 met blou lakmoespapier asook rooi lakmoespapier getoets. Watter resultate kan hulle verwag? (2)

2.1.5 What is the name of the non-metal in group 1? (2)

2.1.1 What is the name of the element in group 2, period 4? (2)

Dehydration can cause ________.

2.2.2 They then tested the solution in beaker 1 with blue litmus paper. It turned red. Which substance is in cup 1? (2)

  INSTRUCTIONS: 1 The answers you provide to the question paper, must be your own, original work. No copying from any source is allowed. No marks will be awarded for work that is copied. 2 Use the mark allocation as a guide to how much information is required in your answers. 3 Answer all the questions – do not leave any blank.

Peristalsis _______.

2.1.3 What is the atomic number of the above element? (2)