Respiration
Difference between aerobic and anaerobic respiration
Which organ excretes urea
Kidneys
Which part of the eye controls the amount of light entering
The iris
Define a drug
It affects chemical reactions, altering how the body works
What is the function of testes
To produce sperm and testerone
Name the substance that builds up muscles during anaerobic respiration
Name 1 of the 2 substances excreted by the lungs
CO2 or water vapor
What is reflex action
Automatic, fast, involuntary response to stimulus
Which drug in cigarettes is addictive
Nicotine
What is fertilisation
The fusion of male and female gametes to form a zygote
Write the word equation for aerobic respiration
Glucose + oxygen -> carbon dioxide + water + (energy)
What is the role of nephron
Filters blood and produces urine
State the function of synapse
Pass impulse from one neuron to the next using neurotransmitter
How does alcohol affect reaction time
You get drunk<
State the one difference between sexual and asexual production
Variation in sexual (two parents)
identical in asexual (one parent)
Which organelle is responsible for respiration in cells
Mitochondria
Why is excretion important for survive
removes toxic substance and maintains the body's chemical balance
Which hormone controls the blood sugar levels
Insuline
Explain the effects of heroin on the nervous system
It reduces communication and slows the process of brain
Name two methods of birth control
Birth control, contraception, condom, surgery
Why does breathing rate remain high after vigorous exercise
To repay the oxygen debt (to break down lactic acid)
How does sweating help in both excretion and temperature regulation
It removes urea, salts and water. It absorbs heat and cools the body when it evaporates
Compare the nervous system and the endocrine system
Nervous: electrical impulses, very fast, short-lived
Endocrine: hormones, slower, longer-lasting
Distinguish between medicinal and recreational drugs
Medical drugs are used to treat diseases
Recreational drugs are taken for enjoyments
It transfers oxygen, nutrients, antibodies and removes CO2 and waste