Does Caffeine Affect the Heart Rate of Daphnia? Introduction This experiment deals with the affects of caffeine on the heart rate of daphnia. The following includes information about daphnia and caffeine. Daphnia, also commonly called water fleas are small aquatic crustaceans. They are about 0.3 mm long which is about the size of this dot ( . )
Planarians and earthworms are different species, therefore, they have many differences. To start with, the worms live in different locations. Planarians live in ponds, streams, and oceans, while earthworms live in moist soil. This might surprise you, but where they live is an advantage and disadvantage. It’s an advantage because the worms can get what they need to survive, like food and oxygen.
When the body is dehydrated, ADH is released, causing the collecting ducts to become more permeable. Therefore more water is reabsorbed and more concentrated urine is excreted. Red blood cells contain haemoglobin. Haemoglobin is a globular protein, in which
Caffeine more specifically belongs to the Xanthine family or alkaloids. Xanthines are known for their use as stimulants. They stimulate the Central Nervous System in turn causing heightened alertness and increased energy. Additionally, caffeine, falling under the Xanthine family, is also known to act as a diuretic, increases heart rate, and raises blood pressure. Due to these classifications and symptoms it is important to moderate the amount of caffeine ingested.
Hormones, which are chemical messengers, transfer information from one gland to another for important body functions. When the receptor is stimulated, the cell responds to the hormone in specific ways. Endocrine hormones are secreted into the bloodstream, while exocrine hormones are secreted into a duct and go through paracrine signaling. Hormones have many different effects on the body such as mood swings, metabolism regulation, control of the reproductive system, hunger cravings and many others. The glands which are involved in the endocrine system
They caught their prey by means of a swift bite which transfer the fast-acting venom. This venom will killing the victim and also breaking down the tissues to aid digestion. This species can grow up to 2.75metreswhich perhaps the longest species of the sea snake in the marine ecosystem. They are usually give birth to the fully-developed live young which are small in number. Morphologically, they have the rounded or pointed tips scales on the thickest part of the body.
The medical term for High Blood Pressure is Hypertension. In this reading you will learn the types of Blood Pressure, the causes of High Blood Pressure and the cure for High blood Pressure. There are two types of Blood Pressures an individual has. Systolic blood pressure and Diastolic blood pressure. Systolic pressure is the force of blood in the arteries as the heart beats.
The Effect of Caffeine on the Heart Rate of Daphnia Introduction In humans, caffeine acts as a stimulant drug, causing an increased heart rate. At high levels of consumption, caffeine has been linked to restlessness, increased stress and blood pressure. We decided to experiment on the effects of caffeine on daphnia and to see whether the same effects apply to their heart rate as they do to humans. Hypothesis As you increase the concentration of caffeine, the daphnia’s heart rate will also increase Ethical issues with using invertebrates We chose to use daphnia in our experiment, mainly for the practicality that they are transparent, so we were able to visibly see their heart clearly, making the experiment easy to be carried out. We also used them because they don’t have very complex nervous systems like other larger animals, meaning they don’t feel as much pain as some animals, such as dogs.
Glutamate is a chemical substance in the body which binds to Ionotropic glutamate N-methyl-D-aspartate (NMDA) receptors constantly. This regular binding regulates neuronal excitability throughout the nervous system and is also directly responsible for the regulation of muscle tone in humans. An increase in NMDA receptor activity may lead to central sensitization in certain types of neuropathic pain. It is not known exactly how glutamate binds to its primary site; however it’s said that glutamate receptor antagonists are structurally similar to glutamate. And on the NMDA receptor site there exists an Allosteric site which is what glutamate interacts with initially.
(http://www.sharks-world.com/tiger_shark/) The tiger sharks digestive system isn’t that complex. The quelled, which is a tube its food passes through, takes the food into the stomach. As digestion starts the food goes into the intestines. The food that is absorbed by the intestines goes into the liver and nutrients get absorbed. Tiger sharks actually eat whatever they can find.