Neural basis of responses to sex pheromones, Biology

Assignment Help:

Neural Basis of Responses to Sex Pheromones

The ability of insects to detect and discriminate between a variety of pheromones with great sensitivity depends on the presence of specific neural structures in the neuropile of the male antennal lobes. The female antennal lobe lacks these structures. The electrophysiological signals resulting from interaction between pheromonal molecules and antennal olfactory receptors are passed via the olfactory nerve to the specific part of the brain containing specific neural circuitary to decode complex pheromonal signals.

The brain then translates pheromonal information into the act of directional locomotion or orientational responses. There are pheromones that act more slowly and have longer lasting effects. For example, if a newly fertilised female mouse is caged with a strange male, the odor of that male will terminate pregnancy. The pheromone responsible comes from the urine of the male. It is received by the olfactory receptors of the female and triggers activity in the hypothalamus which directs the pituitary to release a hormone that reduces the steroid hormone output of the ovaries. The uterus does not receive adequate hormones for implantation of foetus and the pregnancy aborts.


Related Discussions:- Neural basis of responses to sex pheromones

Animal kingdom, classification of phylum protozoa upto groups

classification of phylum protozoa upto groups

Define method for radiographic evaluation of the outcome, Method for Radiog...

Method for Radiographic evaluation of the outcome or RCT Ørstavik and associates suggest the use of the periapical index (PAI) for radiographic evaluation of the outcome of roo

Using autonomous transactions, Using Autonomous Transactions   The tra...

Using Autonomous Transactions   The transaction is a sequence of SQL statements that does a logical unit of work. Frequently, one transaction starts the other. In several appl

Bacterial food poisoning, Bacterial food poisoning Food poisoning is a...

Bacterial food poisoning Food poisoning is an acute gastro-enteritis or intestinal disorder resulting from the ingestion of foods contaminated with either living microorganism

Respiratory chain to produce atp, Decreasing power is available in a cell b...

Decreasing power is available in a cell both as NADPH and NADH but these have quite distinct roles. NADH is oxidized by the respiratory chain to produce ATP by oxidative phosphoryl

Explain about the family and social history - assessment, Explain about the...

Explain about the Family and Social History - Assessment  Recent studies suggest that genetic variation plays an important role in etiology of learning problems. Hence, the col

Explain about the vitamin a - fat soluble vitamins, Explain about the Vitam...

Explain about the Vitamin A? Vitamin A, one of the fat soluble vitamins, refers to a sub-group of retinoid that possess the biological activity of all-trans-retinol. The term '

Project for seminar, Ask question #Minimum 100 words acceptethe best topics...

Ask question #Minimum 100 words acceptethe best topics for seminAR d#

Explain the transportation of vitamin a, Explain the Transportation of Vita...

Explain the Transportation of Vitamin A? The chylomicra and retinal-binding protein play an important role in the transport of retiuol. This chylomicra complex enters the lymp

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd