WAEC-HEALTH-SCIENCE-ANSWERS
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WAEC-HEALTH-SCIENCE-ANSWERS
HEALTH-SCI-OBJ
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Completed.
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Section B
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(8ai)
(i)First pubertal change: enlargement of the testicles

(ii)Penis enlargement: begins approximately 1 year after the testicles begin enlarging

(iii)Appearance of pubic hair: 13.5 years old

(iv)Nocturnal emissions (or “wet dreams”): 14 years old

(v)Hair under the arms and on the face, voice change, and acne: 15 years old

(8aii)
(i)First pubertal change: breast development

(ii)Pubic hair development: shortly after breast development

(iii)Hair under the arms: 12 years old

(iv)Menstrual periods: 10 to 16.5 years old

(v)body shape will change. For example, her hips will widen.

(8bi)
(i)Using tobacco
(ii)Obesity
(iii)Alcohol
(iv)Viral infections, such as human papillomavirus (HPV)
(v)Exposure to radiation

(8bii)
(i)Eating a healthy diet
(ii)Protecting the skin from Sun
(iii)Get immunized (HPV & HEPATITIS VACCINES)
(iv)Finding precancerous conditions early.
(v)Avoid alcohol and Maintain a healthy weight and be physically active.
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(7a)
Tabulate.
(i)
Cell; Muscle cell
Location; Walls of the heart
Function; Contract the heart to pump blood

(ii)
Cell; Nerve cell
Location; Skin surface
Function; Sensitivity

(iii)
Cell; Reproductive cell
Location; Fallopian tube
Function; Waits for sperm in order to fuse to form a zygote

(7b)
(i) Leukaemia
(ii) Heart attack
(iii) Atherosclerosis
(iv) Cardiac Ischemia
(v) Mitral valve regurgitation

(7ci)
Environment: The sum of your total surroundings- your family, where you grew up, where you live now, and all of your experiences.
-Your environment also includes the people in your life as well as your culture.

(7cii)
Heredity: all the traits and properties that are passed along biologically from both parents to child.
-You inherit physical traits such as the color of your hair and eyes, shape of your nose and ears, as well as your body type and size.

(7cii)
Life Style ; Your Life style includes your family and other people you come into contact daily. a person who is surrounded by individuals who show love, support, strength, and things you do and your way of life .
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(9ai)
pulmonary circulation: The pulmonary circulation is the portion of the circulatory system which carries deoxygenated blood away from the right ventricle, to the lungs, and returns oxygenated blood to the left atrium and ventricle of the heart.

(9aii)
Systemic circulation: Systemic circulation carries oxygenated blood from the left ventricle, through the arteries, to the capillaries in the tissues of the body.

(9b)
(i) Peptic Ulcer Disease
(ii) Constipation
(iii) Gallstones
(iv) Gastroesophageal Reflux Disease
(v) Inflammatory Bowel Disease

(9c)
(i) Conduction
(ii) Convection
(iii) Radiation
(iv) Evaporation

(9di)
(i) Streams
(ii) Rivers
(iii) Wells

(9dii)
(i) Screening
(ii) Coagulation
(iii) Filtration
(iv) Disinfection
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Section A
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(5)
(i) Financial support.
(ii) Multi-service agencies.
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(6)
Excretion is the removal of substances from plants, animals and other living organisms. In humans, the skin, lungs and kidneys are excretory organs.
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(3)
(i)Prevent bone damage
(ii)Protect some internal organ
(iii)Ensure the bone move smoothly in the joint
(iv)It can cushion and deaden load
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(4)
(i)Eat a balanced diet.
(ii)Get regular exercise.
(iii)Drink more water.
(iv)Cut down on caffeine.
(v)Get good sleep
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(1a)
(i)failure to thrive
(ii)refusal of foods
(iii)allergies and intolerances
(iv)iron deficiency anemia
(v)vitamin D deficiency.

(1bi)
hydrophobic amino acids
(1bii)
iron and zinc
(1biii)
Hydrogen Condition – Nickel catalyst
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(2a)
Hormones are chemical messengers that are secreted directly into the blood, which carries them to organs and tissues of the body to exert their functions.

(2b)
(i)it help in preventing people from transmitting diseases to people and family.
(ii)It helps in separating patients from others to prevent transmission to healthy people.

(2c)
(i)The flu.
(ii)The common cold.
(iii)Chickenpox.
(iv)Measles.