e) during the post-embryonic development of a moth. ) Describe the concentrations of ecdysone before the animal moults and propose a hypothesis on the role of this hormone. ) Describe the concentrations of juvenile hormone during post-embryonic development and propose a hypothesis on the role of this hormone.

Q: n mosquitoes, (i) Moult inhibiting hormone (MIH) or Juvenile hormone which is most effective. Why?…

A: The molt-inhibiting hormone (MIH) is a neurohormone which exerts an inhibitory effect on the…

Q: Lateral inhibition and induction are key processes in embryonic development. Discuss two different…

A: Lateral Inhibition is the process in which a particular neuron is being stimulated and it's…

Q: Define The LIS1 protein, whichregulates dynein, is required for brain development.

A: Lissencephaly is related to brain disorders, this disease leads to sporadic mutations in the gene…

Q: Epinephrine secretion: a) activates adenylate cyclase in liver and muscle cells. b) activates…

A: Epinephrine is the hormone secreted by the adrenal medulla. It increases the cAMP level in muscle,…

Q: The nervous system sends chemical signals to other distant cells in the form of a) Action potentials…

A: A neuron conveying a message (i.e., a presynaptic neuron) delivers a chemical called a…

Q: 40. Administration of prednisone for long periods causes atrophy of which of the following endocrine…

A: Prednisone is a glucocorticoid medication mostly used to suppress the immune system and decrease…

Q: 2. Researchers have discovered significant changes in the gene of some protein, which is a substrate…

A: Insulin is an anabolic peptide hormone secreted by B-cells of the pancreas. It plays a major role in…

Q: 76. During an in vitro experiment, it is found that glucocorticoids inhibit the growth of all neural…

A: Answer is option (A) Acetylcholine release from sympathetic fibres.

Q: 13) when testing the ability of a frog’s skeletal leg muscle to move, which chemical would be best?…

A: Neurotransmitters are chemicals that are responsible for transmitting signals between nerve cells,…

Q: of the following labeled sites of the pituitary gland? Neural ectoderm Rathke's pouch A) ->>> B) C)

A: The endocrine system comprises feedback loops of the hormones released by endocrine glands. The…

Q: What is a chemical substance that is released from a cell and has a local effect on the same cell…

A: The correct option is B . Paracrine  chemical signal .  Unlike Autocrine chemical signalling , the…

Q: 10. Which of the following is a calcium release channel? A)Ryanodine receptor B)Tropomyosin C)DHP…

A: A calcium channel can be defined as an ion channel that is selectively permeable to the calcium…

Q: 11) Postpartum estrus (PPE) is the period of receptivity immediately following parturition (giving…

A: Postpartum estrus (PPE) or Estrus is defined as “the periodic state of excitement in the female of…

Q: Match the following questions solve

A: We can say that Hormones are chemical messenger molecules. Endocrine hormones are released by the…

Q: Often, two hormones have opposite (antagonistic) effects on the same target organs. For example,…

A: Hormones are the signaling molecules that are synthesized by glands and are transported to the…

Q: Identify A in the following reaction. A was converted in one step to blattellaquinone, the sex…

A: Pheromones are a mixture of some compounds which are similar in closely related species. It is…

Q: 28)    Which of the following hormones does NOT stimulate production of BPG? a)    Epinephrine b)…

A: Hormonal control is the use of hormones to regulate physiological processes in the body. Hormones…

Q: Endocrine downregulation ... a) ... occurs in target cells that respond to hormones that are…

A: Hormones are chemical messengers secreted by endocrine glands. Hormones are released directly into…

Q: drug that binds at the same site as the neurotransmitter and prevents the neurotransmitter from…

A: Drugs mediate the effect by being an agonist or an antagonist. Agonists help to mediate a particular…

Q: Pick the neurohormone from the list below a) Thyroxine b)growth hormone c) prolactin d) antidiuretic…

A: Neurohormone - Any hormone generated and released into the bloodstream by neuroendocrine cells (also…

Q: 10. Proinsulin, stored in secretory vesicles in the B-cells of pancreatic islets, is converted to…

A: Proinsulin is a single chain pancreatic polypeptide precursor of the hormone insulin which results…

Q: Pumps deliver insulin through: a) A tube inserted under skin b) A pod attached to body c) Both a and…

A: Insuline is a pancreatic hormone secreated by beta cells of pancreas which play important role in…

Q: What is the importance of PRF (prolactin-releasing factors) in humans?

A: The hormone is known as the chemical messenger of the biological organism. It is secreted from an…

Q: Which of the following hormones activates cytoplasmic and nuclear receptors? a.) Epinephrine b.)…

A: Hormones are chemical messenger that are involved in cell signaling and released from the endocrine…

Q: 32. During a study of insulin response, a healthy nonobese 24-year-old woman consumes four pancakes…

A: When subjected to a prolonged period of starvation, the level of glucose in the blood falls. This…

Q: )What tissue regulates both the adenohypophysis and the neurohypophysis?  Does this tissue regulate…

A: Apologies. We only answer one question at a time. we will answer the question 1  as the exact one…

Q: 7) What hormone is produced during long-term stress? a) FSH b) LH c) ACTH d) norepinephrine

A: A hormone is a chemical substance produced and secreted by glands in the endocrine system that…

Q: Parathyroid glands produce a hormone that O a) stimulates the formation of white blood cells O b)…

A: The endocrine system is one of the major systems of the human body that aids in the production,…

Q: 32. Through our expertise in biochemical manipulation, we found a way to alter the G protein-coupled…

A: The g protein coupled receptor are the receptor which are present in the cell membrane and passes…

Q: 27. An experiment is done to study the pituitary adrenal axis. A transsphenoidal hypophysectomy is…

A: Transsphenoidal hypophysectomy: Transsphenoidal hypophysectomy is a surgical procedure to remove or…

Q: 78. The various types of endocrine glands all have extensive Golgi Apparatus.  Which of the…

A: Cellular functions are continuously regulated and coordinated by the release of different…

Q: 13) Protein filaments in the cell bodies of acetylcholine-producing neurons is a hallmark…

A: Acetylcholine is a neurotransmitter involved in function of  processing the memory and learning.

Q: 75 Sympathetic neurons require nerve growth factor (NGF) derived from their targets for normal…

A: In eukaryotic cells, the cytoskeleton plays an important role in maintaining the structure of the…

Q: Sperm whales have a specialized spermaceti organ in their head cavities filled with wax cetyl…

A: Every species is different from another due to some special characters. This is the reason behind…

Q: Name the structure that produces progesterone.

A: The corpus luteum is a yellow hormone-secreting body.  It is formed by the ovum, which is not…

Q: Define the following terms:a. prenylationb. steroidc. digitalisd. lipoproteine. apolipoprotein

A: Steroid is the type of lipids that is involved in the production of the hormone in the human body.

Q: 7. Organophosphates, which are found in a lot of insecticides, block the activity of…

A: Acetylcholinesterase is the primary cholinesterase in the body. It is an enzyme that catalyzes the…

Q: Insulin dependent diabetes is caused by the degeneration of beta cells due to a _________.a) gene b)…

A: Insulin-dependent diabetes is otherwise known as Type 1 diabetes (T1D). This medical condition is…

Q: Which of the following types of molecules can be a hormone? a) Phospholipids b) Fatty acid…

A: The biochemical substances synthesized and secreted by endocrine gland or specialised cells are…

Q: What secondary structures are prevalent in Estrogen Receptor?

A: Estrogen receptors are transcription factors activated by ligands that regulate gene expression by…

Q: phomicrograph synthesizes and secretes which of the following hormones? (A) thyroid-stimulating…

A: In the neck, there is presence of parathyroid gland which is situated behind the thyroid gland. The…

Q: Match each hormone to its correct classification. Choices are used >1 times or not at all. A)…

A: Hormones are chemical messenger molecules. Endocrine hormones are released by the endocrine glands…

Marine Evolution

Marine habitat is less explored, and hence, its biological diversity is far less known. The marine habitats are not constant due to their shifting nature, while the terrestrial habitats are more stable. Marine biology is the science that deals with the study of diverse marine species, their interactions, and behavioral characteristics.