Question 18M.3.HL.TZ2.23
| Date | May 2018 | Marks available | [Maximum mark: 6] | Reference code | 18M.3.HL.TZ2.23 |
| Level | HL | Paper | 3 | Time zone | TZ2 |
| Command term | Compare and contrast | Question number | 23 | Adapted from | N/A |
Compare and contrast steroid and peptide hormone action.
[6]
a. both «peptide and steroid hormones» act on target organs/cells
b. both «peptide and steroid hormones» travel through blood
c. the effect of both «peptide and steroid hormones» lasts for a longer time «than neurotransmitters»
OR
both are effective at very low concentrations
d. example of each type of hormone
e. steroid hormones enter cell/cross plasma membrane while peptide hormones do not
f. steroid hormones join receptor in cytoplasm while peptide hormones join receptor on membrane
g. steroid hormone-receptor complex travels to nucleus whereas peptide hormone-receptor triggers a cascade reaction/second messenger
h. steroid hormones activate genes while peptide hormones activate enzymes
i. peptide hormone requires ATP, steroid hormone does not
Award [5 max] if no similarities are presented.
