Science
What is the equation for photosyntnesis?
Carbon dioxide + water → gloucose + oxygen
Where does photosynthesis take place?
Chloroplasts
Is photosynthesis a endothermic or exothermic reaction?
Endothermic
What affects the rate of photosynthesis?
The concentration of carbon dioxide.
What is the compensation point?
The rate of photosynetnesis equals the rate of respiration.
What word means change in enviroment?
Stimulus
Give 2 examples of effectors?
Glands and muscles.
What type of neuron carries electrical impulses towards the central nervous system?
Sensory neurone.
What are 3 examples of conditions controlled by homeostasis in the body?
Blood glucose concentration, body temperature and water levels.
What is included in the CNS?
The peripheral nervous system.
What is the order during a nervous response?
Stimulus → receptor → coordinator → effector → response.
Name 3 types of neurones?
Sensory, relay and motor.
What moves the synapse?
Chemical messenger.
What do receptors in the eye detect?
Light
What insulates some axons?
Carbon fibre.
What organ does a reflex arc miss out?
Spinal cord.
How do neurotansmitters move across a synapse?
Diffusion
Why do hormones take so long to react?
They have to traval through the blood stream to targeted organs.
What system release hormones?
The endocrine system.
Which gland is located at the base of the neck?
Thyroid gland.
How can type 2 diabetes be caused?
Lack of exercise and a poor diet
Which hormones are produced in the male and reproductive female organ?
Testosterone and oestrogen.
Which hormones are produced in the ovaries?
Oestrogen and progesterone.
How long does the menstrual cycle take?
28 days.
What changes happen to boys during puberty?
Voice breaks, body becomes more muscular and the body produces sperm.
What do oestrogen and progesterone do in the menstrual cycle?
Maintaining me uterus lining. Stimulate the release of the egg.
What are some non-hormonal methods of contraception irreversible?
Surgical methods such as sterilisation, cannot be reversed in the future.