C. Define these terms.
1. Endocrine gland
2. Chemical messenger
3. Tropic hormones
4. Stress
5. Puberty
6. Adolescence
Answers
Answer:
1. The endocrine system is a chemical messenger system comprising feedback loops of the hormones released by internal glands of an organism directly into the circulatory system, regulating distant target organs. In humans, the major endocrine glands are the thyroid gland and the adrenal glands.
2. A chemical messenger is any compound that serves to transmit a message. A chemical messenger may refer to: Hormone, Long range chemical messenger. Neurotransmitter, communicates to adjacent cells. Neuropeptide, a protein sequence which acts as a hormone or neurotransmitter.
3. Tropic hormones are hormones that have other endocrine glands as their target. Most tropic hormones are produced and secreted by the anterior pituitary.
4. Stress is a feeling of emotional or physical tension. It can come from any event or thought that makes you feel frustrated, angry, or nervous. Stress is your body's reaction to a challenge or demand. In short bursts, stress can be positive, such as when it helps you avoid danger or meet a deadline.
5. Puberty is the process of physical changes through which a child's body matures into an adult body capable of sexual reproduction. It is initiated by hormonal signals from the brain to the gonads: the ovaries in a girl, the testes in a boy.
6. Adolescence, transitional phase of growth and development between childhood and adulthood. The World Health Organization (WHO) defines an adolescent as any person between ages 10 and 19. This age range falls within WHO's definition of young people, which refers to individuals between ages 10 and 24.
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