Online Test — Endocrine System and Reproduction
35 Questions • 15 min • Chapter MCQ
15:00
Question 1 of 35
Chemical messengers released by endocrine glands into the blood are called:
Enzymes
Hormones
Vitamins
Nerves
Explanation: Hormones are the chemical messengers made by endocrine glands.
Question 2 of 35
Endocrine glands are called "ductless" because they release hormones:
Through tubes
Directly into the blood
Into the gut
Onto the skin
Explanation: Endocrine glands pour hormones directly into the blood, without ducts.
Question 3 of 35
The "master gland" that controls other endocrine glands is the:
Thyroid
Pituitary
Adrenal
Pancreas
Explanation: The pituitary gland controls several other glands and makes growth hormone.
Question 4 of 35
The hormone released during fear or danger ("fight-or-flight") is:
Insulin
Adrenaline
Thyroxine
Oestrogen
Explanation: Adrenaline, from the adrenal glands, prepares the body for emergencies.
Question 5 of 35
Insulin and glucagon, which control blood glucose, are made by the:
Thyroid
Pancreas
Pituitary
Testes
Explanation: The pancreas (islets of Langerhans) makes insulin and glucagon.
Question 6 of 35
A system in which the body detects a change and acts to correct it is a:
Feedback mechanism
Reflex arc
Blood group
Synapse
Explanation: A feedback mechanism detects a change and corrects it to keep conditions steady.
Question 7 of 35
In negative feedback, the body's response to a change:
Opposes the change
Increases the change
Has no effect
Stops the heart
Explanation: In negative feedback the response works against (opposes) the change.
Question 8 of 35
When blood glucose is too high, the pancreas releases:
Glucagon
Insulin
Adrenaline
Thyroxine
Explanation: Insulin lowers a high blood-glucose level.
Question 9 of 35
When blood glucose is too low, it is raised by the hormone:
Insulin
Glucagon
Oestrogen
Growth hormone
Explanation: Glucagon raises a low blood-glucose level by releasing stored glucose.
Question 10 of 35
A condition in which blood glucose stays too high due to insulin problems is:
Goitre
Diabetes
Anaemia
Scurvy
Explanation: Diabetes results when insulin is lacking or not used properly.
Question 11 of 35
The male gamete and female gamete are, respectively, the:
Egg and sperm
Sperm and egg
Sperm and sperm
Egg and egg
Explanation: The male gamete is the sperm; the female gamete is the egg (ovum).
Question 12 of 35
Sperms and the hormone testosterone are produced by the:
Ovaries
Testes
Uterus
Kidneys
Explanation: The testes (male gonads) make sperms and testosterone.
Question 13 of 35
In the male, sperms are carried from the testes by the:
Fallopian tube
Vas deferens
Ureter
Oviduct
Explanation: The vas deferens carries sperms from the testes toward the urethra.
Question 14 of 35
The female gonads that produce eggs and hormones are the:
Testes
Ovaries
Uterus
Bladder
Explanation: The ovaries produce eggs and the hormones oestrogen and progesterone.
Question 15 of 35
The organ in which a baby develops is the:
Ovary
Fallopian tube
Uterus
Urethra
Explanation: The uterus (womb) is where the baby develops.
Question 16 of 35
The menstrual cycle lasts, on average, about:
7 days
14 days
28 days
90 days
Explanation: The menstrual cycle is on average about 28 days long.
Question 17 of 35
The release of a mature egg from the ovary is called:
Menstruation
Ovulation
Fertilisation
Implantation
Explanation: Ovulation is the release of the mature egg, around day 14.
Question 18 of 35
During menstruation, what is shed from the body?
A mature egg
The thickened uterus lining
A sperm
The ovary
Explanation: In menstruation, the thickened lining of the uterus is shed.
Question 19 of 35
A surge of which hormone triggers ovulation?
Insulin
LH (luteinising hormone)
Adrenaline
Thyroxine
Explanation: A surge of LH from the pituitary triggers ovulation.
Question 20 of 35
Which hormone helps build up the lining of the uterus?
Oestrogen
Glucagon
Adrenaline
FSH only
Explanation: Oestrogen from the ovary helps build up and thicken the uterus lining.
Question 21 of 35
Fertilisation is the fusion of a sperm with a(n):
Zygote
Egg (ovum)
Embryo
Foetus
Explanation: Fertilisation is the joining of a sperm and an egg.
Question 22 of 35
The single cell formed when a sperm joins an egg is the:
Embryo
Foetus
Zygote
Follicle
Explanation: The fused sperm and egg form a single cell called the zygote.
Question 23 of 35
In humans, fertilisation normally takes place in the:
Uterus
Fallopian tube
Ovary
Vagina
Explanation: Fertilisation usually occurs in the fallopian tube.
Question 24 of 35
The attachment of the embryo to the lining of the uterus is called:
Ovulation
Implantation
Menstruation
Fertilisation
Explanation: Implantation is the embryo attaching to the uterus lining.
Question 25 of 35
The organ that supplies the developing baby with food and oxygen is the:
Placenta
Ovary
Kidney
Liver
Explanation: The placenta supplies food and oxygen and removes the baby's wastes.
Question 26 of 35
The stage of life between childhood and adulthood is called:
Infancy
Adolescence
Old age
Embryo stage
Explanation: Adolescence is the period between childhood and adulthood.
Question 27 of 35
The physical changes that mark the start of adolescence are together called:
Puberty
Digestion
Excretion
Reflex
Explanation: Puberty is the set of physical changes that begin adolescence.
Question 28 of 35
Which of these is a secondary sexual character in girls?
Deep voice
Breast development
Facial hair
Larger feet only
Explanation: Breast development is a secondary sexual character in girls.
Question 29 of 35
The changes of puberty are mainly brought about by:
Digestive juices
Sex hormones
Bile
Saliva
Explanation: Sex hormones (testosterone; oestrogen and progesterone) cause puberty's changes.
Question 30 of 35
Which is the healthiest way to deal with worries during adolescence?
Keep them hidden always
Talk to trusted adults
Stop eating
Avoid all sleep
Explanation: Talking to trusted adults (parents, teachers) is a healthy way to cope.
Question 31 of 35
Reproductive health is best supported by:
Skipping meals
A balanced diet and good hygiene
Avoiding all sleep
Hiding all questions
Explanation: Good diet, hygiene, rest, and asking trusted adults support reproductive health.
Question 32 of 35
AIDS is caused by a virus called:
HIV
Goitre
Insulin
Bacteria only
Explanation: AIDS is caused by the virus HIV.
Question 33 of 35
HIV/AIDS spreads through:
Hugging and sharing food
Ordinary daily contact
Not through ordinary contact like handshakes or sharing food
Studying together
Explanation: HIV does not spread through ordinary everyday contact.
Question 34 of 35
If a touch or situation makes you feel uncomfortable or scared, you should:
Keep it secret
Move away and tell a trusted adult
Ignore it forever
Blame yourself
Explanation: You should move away, say no, and tell a trusted adult at once.
Question 35 of 35
In India, the national child helpline number a child can call for help is:
100
1098
1100
555
Explanation: 1098 is the national child helpline number in India.