State the importance of including vitamins in our diet.

Suggest one limitation of the information about vitamins shown on this label.

Distinguish between gastric juice and pancreatic juice using the table.

Describe the mode of action of steroid hormones.

Many animals, including humans, maintain strongly acidic conditions in part of their digestive systems. Explain two benefits of this to the animal.

are essential for health / cannot be synthesized by humans

Vitamin D is altered from a precursor.

does not mention whether the information is based on adults/children/age

OR

only two vitamins are shown/no quantities given for vitamins

OR

it does not take into consideration sex / pregnancy / activity levels

Accept other valid correct limitation.

Each row must be a distinction

a. steroid hormones enter cell / steroid hormones can pass through cell membranes 

b. steroid hormones bind to receptor in the cytoplasm 

c. the receptor-hormone complex interacts directly with genes/regulates gene expression 

d. example (e.g. oestrogen, testosterone, progesterone) 

a. provides ideal pH for stomach enzyme activity 

b. (acidic conditions) denature proteins /start breakdown of other organic substances 

c. (acidic conditions) convert pepsinogen (inactive) into pepsin 

d. (acidic conditions) destroy pathogens in ingested food