Cells called receptors detect stimuli (changes in the environment).
State some receptors and the stimuli they detect.

Draw a labelled diagram of a light receptor cell

Describe a simple reflex action

what is an effector ?

how is the amount of water in the body controlled?

How is ion content controlled ?

Why is it important to control body temperature and how is it done?

Why must blood sugar be controlled and is it done

What are hormones and how are they transported around the body

Describe the function of the 3 main hormones in the menstrual cycle

Describe how oral contraceptives can prevent pregnancy

Describe the problems with early birth control pills and how they have been improved

describe how IVF works

How do hormones control phototropism and gravitropism

Why do roots grow down ? (gravitropism)

why do shoots grow up ?

Explain why shoots grow towards the light ?

give 3 uses of plant hormones by farmers

name 3 stimuli which affect humans

what is a reflex and why are they important

what are the differences in action between nerves and hormones

describe issues with IVF

describe the issues with the contraceptive pill

How long is the menstrual cycle and when approximately does ovulation occur

draw a picture of the reflex arc