feed-and-breed

Examples of feed-and-breed in the following topics:

• Control of Autonomic Nervous System Function

  • The medulla's main functions are to control the cardiac, respiratory, and vasomotor centers, to mediate autonomic, involuntary functions, such as breathing, heart rate, and blood pressure, and to regulate reflex actions such as coughing, sneezing, vomiting, and swallowing.
  • The hypothalamus acts to integrate autonomic functions and receives autonomic regulatory feedback from the limbic system to do so.
  • The ANS is classically divided into two subdivisions, the sympathetic division and the parasympathetic division.
  • PSNS input to the ANS is responsible for the stimulation of feed-and-breed and rest-and-digest responses, as opposed to the fight-or-flight response initiated by the SNS.
  • The medulla is a subregion of the brainstem and is a major control center for the autonomic nervous system.

• Divisions of the Autonomic Nervous System

  • Sympathetic and parasympathetic divisions typically function in opposition to each other.
  • Many think of sympathetic as fight or flight and parasympathetic as rest and digest or feed and breed.
  • Some functions of the SNS include diverting blood flow away from the gastrointestinal (GI) tract and skin via vasoconstriction, enhancing blood flow to skeletal muscles and the lungs, dilating the bronchioles of the lung to allow for greater oxygen exchange, and increasing heart rate.
  • The PSNS typically functions in contrast to the SNS by dilating the blood vessels leading to the GI tract, causing constriction of the pupil and contraction of the ciliary muscle to the lens to enable closer vision, and stimulating salivary gland secretion, in keeping with the rest and digest functions.
  • Distinguish between the parasympathetic and sympathetic subsystems of the autonomic nervous system

• Autonomic Interactions

  • Sympathetic and parasympathetic divisions typically function in opposition to each other.
  • Consider sympathetic as fight or flight and parasympathetic as rest and digest or feed and breed.
  • The SNS promotes a fight-or-flight response, corresponds with arousal and energy generation, and performs the following functions:
  • Dilates pupils and relaxes the ciliary muscle to the lens, allowing more light to enter the eye and far vision.
  • Conversely, the PSNS promotes a rest-and-digest response, and promotes the following functions:

• Selective Breeding

  • Selective breeding is a field concerned with testing hypotheses and theories of evolution by using controlled experiments.
  • Selective breeding of plants and animals has led to varieties that differ dramatically from their original wild-type ancestors.
  • Examples are the cabbage varieties, maize, or the large number of different dog breeds .
  • This Chihuahua mix and Great Dane show the wide range of dog breed sizes created using artificial selection, or selective breeding.
  • Illustrate how controlled experiments have allowed human beings to selectively breed domesticated plants and animals.

• Sponge Communities

  • Sponge reefs serve an important ecological function as habitat, breeding and nursery areas for fish and invertebrates.
  • Sponge reefs serve an important ecological function as habitat, breeding, and nursery areas for fish and invertebrates .
  • The sponge's response is to stop feeding.
  • It will try to resume feeding after 20-30 minutes, but will stop again if the irritation is still present.
  • The reefs are composed of mounds called "bioherms" that are up to 21 m high, and sheets called "biostromes" that are 2-10 m thick, and may be many km wide.

• RSS Feeds

  • A given RSS source is usually called a feed, and the user's subscription interface is called a feed reader or feed aggregator.
  • RSS Bandit and the eponymous Feedreader are two open source RSS readers, for example.
  • First, the feed reading software is chosen by the subscriber and is the same for all the feeds that subscriber monitors — in fact, this is the major selling point of RSS: that the subscriber chooses one interface to use for all their feeds, so each feed can concentrate just on delivering content.
  • You click on the button, and from then on, your feed reader (which may well be an applet embedded in your home page) automatically updates whenever there's news from the site.
  • But at a minimum, the project should offer one RSS feed on the front page, for sending out major announcements such as releases and security alerts.

• Mendelian Crosses

  • Mendel's crosses involved mating two true-breeding organisms that had different traits to produce new generations of pea plants.
  • Mendel performed crosses, which involved mating two true-breeding individuals that have different traits .
  • He then collected and grew the seeds from the F1 plants to produce the F2, or second filial, generation.
  • Mendel's experiments extended beyond the F2 generation to the F3 and F4 generations, and so on, but it was the ratio of characteristics in the P0−F1−F2 generations that were the most intriguing and became the basis for Mendel's postulates.
  • In one of his experiments on inheritance patterns, Mendel crossed plants that were true-breeding for violet flower color with plants true-breeding for white flower color (the P generation).

• Mendel’s Model System

  • Pea plants have both male and female parts and can easily be grown in large numbers.
  • The result is highly inbred, or "true-breeding," pea plants.
  • Now the sperm and eggs come from different parent plants.
  • In this and all the other pea plant traits Mendel followed, one form of the trait was "dominant" over another so it masked the presence of the other "recessive" form in the first generation after cross-breeding two homozygous plants..
  • By experimenting with true-breeding pea plants, Mendel avoided the appearance of unexpected (recombinant) traits in offspring that might occur if the plants were not true breeding.

• Planktonic Food Webs

  • Plankton communities are divided into broad categories of producer, consumer, and recycler groups.
  • Plankton communities are divided into broad categories of producer, consumer and recycler groups.
  • The growth of phytoplankton populations is dependent on light levels and nutrient availability.
  • Zooplankton are the initial prey item for almost all fish larvae as they switch from their yolk sacs to external feeding.
  • Natural factors (e.g., current variations) and man-made factors (e.g. river dams) can strongly affect zooplankton, which can in turn strongly affect larval survival, and therefore breeding success.

• Planktonic Communities

  • They provide a crucial source of food to many large aquatic organisms, such as fish and whales.
  • Zooplankton (from Greek zoon, or animal), small protozoans or metazoans (e.g. crustaceans and other animals) that feed on other plankton and telonemia.
  • Some of the eggs and larvae of larger animals, such as fish, crustaceans, and annelids, are included here.
  • Zooplankton are the initial prey item for almost all fish larvae as they switch from their yolk sacs to external feeding.
  • Natural factors (e.g., current variations) and man-made factors (e.g. river dams) can strongly affect zooplankton, which can in turn strongly affect larval survival and therefore breeding success.