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Chemical Coordination & Integration in One Shot (NCERT) Video Lecture | Biology Class 11 - NEET
FAQs on Chemical Coordination & Integration in One Shot (NCERT) Video Lecture - Biology Class 11 - NEET
| 1. What is chemical coordination and integration? |  |
Ans. Chemical coordination and integration refer to the communication and regulation of various physiological processes in the body through chemical substances called hormones. These hormones are secreted by specialized glands and travel through the bloodstream to target organs or tissues, where they exert their effects and help in maintaining homeostasis.
| 2. What are the major glands involved in chemical coordination? | |
Ans. The major glands involved in chemical coordination are the endocrine glands. These include the pituitary gland, thyroid gland, parathyroid glands, adrenal glands, pancreas, ovaries (in females), and testes (in males). Each gland secretes specific hormones that play vital roles in regulating various bodily functions.
| 3. How do hormones exert their effects on target organs? | |
Ans. Hormones exert their effects on target organs through a process called signal transduction. Once a hormone is released into the bloodstream, it binds to specific receptor molecules located on the surface or within the target cells. This binding triggers a series of biochemical reactions within the cells, leading to the desired physiological response.
| 4. What is the role of the hypothalamus in chemical coordination and integration? | |
Ans. The hypothalamus plays a crucial role in chemical coordination and integration. It acts as a link between the nervous system and the endocrine system by controlling the release of hormones from the pituitary gland. It also regulates various bodily functions such as body temperature, hunger, thirst, sleep, and emotions.
| 5. How does the feedback mechanism maintain hormone levels in the body? | |
Ans. The feedback mechanism plays a vital role in maintaining hormone levels in the body. It involves a loop of communication between the endocrine glands, target organs, and the hypothalamus. When hormone levels deviate from the desired range, the hypothalamus sends signals to either increase or decrease hormone production. Once the hormone levels return to normal, the hypothalamus stops sending these signals, thereby maintaining hormonal balance.
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