Extra things from Exam mistakes

Features of mammals

Body covered in fur

Producing milk to feed the young

Warm blooded

What cells secrete Insulin?

Beta cells in the pancreas

What does insulin do?

Regulates blood sugar. For example, when there is too much glucose, it moves it into cells to store for energy, or the liver stores extra glucose

What are the functions of type I and type II pneymocytes

Type I are thin and have a large surface area, so they carry out gas exchange

Type II secrete a fluid called surfactant, which makes walls more moist and reduces surface tension

Outline the processes occurring during interphase in the cell cycle

• growth / increase in cell size

• Production of more organelles

• DNA replication

• Protein synthesis → necessary proteins for operations required

What is a feature of phloem sieve tubes?

No nucleus

What are features of xylem cells?

Lignified walls and no cytoplasm

What is the purpose of lime water in an aerobic respiration experiment?

It shows any carbon dioxide present

What is the reason the pot was covered with a plastic bag?

To prevent microbes which break down materials in the soil from releasing CO2

What is the difference between control and control variable?

A control is a seperate group in the experiment used as a baseline for comparison

A control variable is a factor in the experiment which is kept constant during the changing independent variable