* CHAHAL’s CSR INITIATIVE * Chahal Academy: A Socially Responsible Institute.
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Reproduction and Embryo development covers the biological processes of gamete formation, fertilization, and the subsequent growth of an embryo into a fetus.
Correct Answer:
(C) In the fourth week of its development
About 4-5 weeks after fertilization, when the heart first begins to beat, the sound of the little heart is too soft to hear. In 4 weeks, the heart typically beats between 105 to 121 times per minute.
Ques: 2
Match the hormones in List-I with items in List-II and select the correct answer using the codes given below:
List-I List-II
Adrenaline 1. Anger, fear, danger
Estrogen 2. Attracting partners through sense of smell
Insulin 3. Females
Pheromones 4. Glucose
Correct Answer:
(C) 1342
Adrenaline - Anger, fear, danger
Estrogen - Females
Insulin - Glucose
Pheromones - Attracting partners through the sense of smell
Ques: 3
With reference to the human body, consider the following statements:
The production of somatotropin goes up when a person exercises.
Men's testes produce progesterone.
Women's adrenal glands secrete testosterone.
Stress causes the adrenals to release very less amount of cortisol than usual.
Which of these statements are correct?
Correct Answer:
(B) 1, 2 and 3
Growth hormone (GH), also known as somatotropin, is a peptide hormone that stimulates growth, cell production and regeneration in human and other animals. The production of somatotropin goes up when a person exercises. Progesterone is primarily a female sex hormone, but it is produced in small amount within men. Progesterone is produced in the ovaries, adrenal glands, testes and brain, and in the placenta during pregnancy. Testosterone is a naturally occurring sex hormone that is produced in a men’s testicles. Small amount of testosterone is also produced in a woman’s ovaries and adrenal glands. Cortisol is produced in humans by the zona fasciculata of the adrenal cortex within the adrenal gland. Its release is increased in response to stress and low blood- glucose concentration.