Frog Dissection Manual 1. 2. Place the frog on the dissecting pan. Do not pin it down. Use these descriptions and the picture to identify each of the following external structures. A. Head – the anterior end of the frog extending to and including the eardrums mouth – the large opening at the anterior end of the head made up of a maxilla and mandible maxilla – the upper jaw bone mandible – the lower jaw bone external nares (i.e. nostrils) – two small openings on the dorsal surface of the
Premium Jaw Liver Maxilla
Neurophysiology of Nerve Impulses ACTIVITY 1 The Resting Membrane Potential 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. If the extracellular K+ increases then the concentration of intracellular K+ will decrease causing a decrease in the steepness of the concentration gradient and fewer K+ ions would be drawn out. 2. Explain why increasing extracellular K+ causes the membrane potential to change to a less negative
Premium Action potential
Pithing and Muscle Preparation. The method for pithing the frog and preparing the frog gastrocnemius muscle will be described by the instructor. The object of the pithing operation is to destroy specified parts of the central nervous system. In this case the frog is pithed as a means of immobilization and anaesthesia. Generally‚ pithing the spinal cord only is adequate. To skin the frog leg‚ cut the skin all around the upper end of the leg. Pull the skin down the leg‚ freeing it from
Premium Knee Tendon Central nervous system
B. Internal: The dissectors: o used hands to turn frog ventral side up‚ head anterior‚ hind limbs posterior o used forceps to lift fold of skin directly anterior to hind limbs o used scissors to make small superficial cut o inserted scissors into cut and continued superficially anterior medial through mandible o used scissors to make 2 lateral superficial cuts just anterior to hind limbs on either side of medial cut and stopped before reaching dorsal surface o
Premium Heart Abdomen
Taylor Dudley "White Frog" Mr. Murray Tuesday‚ October 21 White Frog “White Frog” is one of those remarkable movies that connects intensely with audiences who have experienced “feeling different” or being an outcast or not fitting into the popular crowd. The movie was about a popular‚ high schooled Chaz Young is the light of several people’s lives. None more than that of little bro Nick‚ whose painful social awkwardness has shut him off from nearly everyone else. Nick has a disease called Asperger
Premium Homosexuality Gender
Frog Embryology The Egg The frog egg is a huge cell; its volume is over 1.6 million times larger than a normal frog cell. During embryonic development‚ the egg will be converted into a tadpole containing millions of cells but containing the same amount of organic matter. * The upper hemisphere of the egg — the animal pole — is dark. * The lower hemisphere — the vegetal pole — is light. * When deposited in the water and ready for fertilization‚ the haploid egg is at metaphase of meiosis
Premium Developmental biology Embryo Animal
EED 280 – Standards‚ Observation‚ Assessment: 0 - 8 (37317) Chap 3: How Standardized Tests are Used‚ Designed‚ and Selected 1. What is a standardized test? Describe different types of standardized tests. they are psychological test that measure abilities achievements aptitude interest attitude values and personality characteristic . personality test: measures a person’s tendency to behave
Premium Psychometrics Normal distribution Standard deviation
Once upon a time there was a frog who croaked away in Bingle Bog. Every night from dusk to dawn‚ he croaked on and on. Other little animals around loathed his voice but they were left with no choice. The crass cacophony; a very loud and unpleasant noise blared out from the sumac tree. At whose foot the frog sang till the break of dawn. The stones‚ prayers‚ sticks‚ insults‚ complaints and bricks could not silence the frog’s determination to display his heart’s great pride and joy. One
Premium Human voice English-language films
plethora of trees which cover the tropical floor of the Andes mountains. There is one animal‚ the glass frog‚ that is native to this country and has a unique physical characteristic. Glass frogs have made their home in the forests of Ecuador and Peru and feature a translucent underside which makes their internal organs visible. They live remarkable two-phase lives‚ hopping from tadpole to frog. But there is an issue that has developed in the region of Ecuador relating to these unique creatures
Premium Frog Andes
Background: As members of the class Amphibia‚ frogs may live some of their adult lives on land‚ but they must return to water to reproduce. Eggs are laid and fertilized in water. On the outside of the frog’s head are two external nares‚ or nostrils; two tympani‚ or eardrums; and two eyes‚ each of which has three lids. The third lid‚ called the nictitating membrane‚ is transparent. Inside the mouth are two internal nares‚ or openings into the nostrils; two vomerine teeth in the middle of the roof
Premium Heart Blood Frog