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Class 8 Practice – Level 3 – Set 2 – Reaching the Age of Adolescence
Total questions: 15
1.
The endocrine system regulates puberty through a series of feedback loops. Which feedback mechanism is involved in regulating the release of sex hormones during adolescence?
Positive feedback only
Negative feedback only
Both positive and negative feedback
No feedback mechanism involved
None
2.
Which of the following is an example of a psychological change during adolescence influenced by hormonal changes?
Increased muscle strength
Growth of facial hair
Development of social independence
Widening of hips
None
3.
In males, testosterone stimulates the production of a specific protein in muscles, aiding growth. Which protein is primarily responsible for muscle growth during puberty?
Albumin
Hemoglobin
Myosin
Keratin
None
4.
Which hormone produced by the pituitary gland is essential for both the growth of follicles in females and spermatogenesis in males?
Adrenaline
Insulin
Cortisol
Follicle-stimulating hormone (FSH)
None
5.
During the luteal phase of the menstrual cycle, which hormone increases to prepare the uterus for possible implantation?
Estrogen
Thyroxine
Progesterone
Insulin
None
6.
Certain genetic disorders can influence the reproductive system. Which condition occurs due to the absence of an X chromosome in females, resulting in 45 chromosomes instead of 46?
Turner syndrome
Down syndrome
Klinefelter syndrome
Marfan syndrome
None
7.
Which hormone is involved in regulating circadian rhythms and is crucial for maintaining healthy sleep patterns during adolescence?
Insulin
Melatonin
Thyroxine
Adrenaline
None
8.
In frogs, thyroxine initiates the process of metamorphosis. Which organ produces thyroxine?
Adrenal gland
Thyroid gland
Pituitary gland
Pancreas
None
9.
Which of the following lifestyle factors has the greatest negative impact on reproductive health in adolescents?
High-protein diet
Regular exercise
Sleep deprivation
Increased hydration
None
10.
Adolescents experience changes in skin texture and the onset of acne. Which hormone is primarily responsible for increased oil production in the skin during puberty?
Cortisol
Estrogen
Growth hormone
Androgens
None
11.
Which neurotransmitter's activity increases during adolescence, affecting reward and risk-taking behavior?
Dopamine
Melatonin
Serotonin
Acetylcholine
None
12.
Why do boys experience a deepening of the voice during puberty?
Increase in testosterone causing the larynx to enlarge
Development of facial muscles
Increase in growth hormone
Changes in the nasal cavity
None
13.
In females, the follicle-stimulating hormone (FSH) and luteinizing hormone (LH) work together to regulate ovulation. What triggers the peak release of LH during the menstrual cycle?
Increased progesterone
Declining FSH levels
High estrogen levels
Increased cortisol
None
14.
How does the body prepare for possible pregnancy in the second half of the menstrual cycle if fertilization occurs?
By releasing FSH continuously
By maintaining high levels of progesterone
By initiating a second ovulation
By stopping blood flow to the uterus
None
15.
During adolescence, metabolic rate changes due to increased activity of which gland that regulates overall metabolism?
Pineal gland
Pancreas
Thyroid gland
Parathyroid gland
None
1 out of 15
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