Explanation:
A)Image A represents a peptide hormone that interacts with a receptor, and image B represents a steroid hormone that interacts with the cell’s DNA
The endocrine system involves chemical signalling via the secretion of molecules called hormones into extracellular fluid.
- Steroid hormones are lipophilic, and readily diffuse across cell membranes. They bind to receptors in the interior of the cell to form a complex which regulates gene expression.
- Peptide hormones however,are hydrophilic, and thus cannot readily diffuse across the membrane. They remain outside the cell, binding to receptors which then activate secondary messenger signalling and a subsequent cellular response.
Further Explanation:
Hormones bind to chemical receptors in order to cause specific changes in target cells, these lead to changes in the body's internal environment called homeostasis. It includes the thyroid, parathyroid, pituitary, pineal and adrenal glands along with other regions.
The bone, adipose tissue, heart, pancreas and liver are a few of the regions of the body which show endocrine function. The brain, or control center functions to receive and process the information from the receptor. Effectors receive the control center's command and elicits a response in the form of a feedback loop, that may oppose or enhance the stimulus.
Cells in a multicellular organism become specialized for particular tasks and communicate with one another in order to maintain homeostasis. Within the human body these are known as hormone cascades, where several complex steps occur- the tissues signal to one another with the use of hormones released by the endocrine system. The regulation (increase and decrease) of these secretions is achieved by negative feedback loops, where the release of certain substances during a cascade in turn halts the secretion of hormones at earlier stages.
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Correct answer: Habitat Destruction
Habitat destruction affect the entire habits functionally and it is unable to support the species present in that particular region. The main cause of species extinction all over the world is habitat destruction.
Humans are known to cause extinction of the species by creating pollution, overhunting, by introducing invasive species into the ecosystem etc
Answer:
Aquaculture and fishing are different from each other in many aspects.
Explanation:
Aquaculture can be defined as the process of cultivation of both the aquatic plants and animals, where as Fishing can be defined as catching or harvesting different fishes only. Aquaculture can be of two types- Marine water and fresh water aquaculture. Aquaculture increased the production of food for the consumption of human and also increase the national import level. Fisheries generally deals with catching and selling fishes. Main point that can be noted is- pearls can be gained only through the process of aquaculture not through fishing.
Answer: Nucleus
Eukaryote means that the cell contains a nucleus.
Answer:Your answer is b
Explanation:
Had anatomy last year. Hope it helps
