Cell Organelles Nucleus Its function is to control the cell’s activities and retain the chromosomes. The nucleus is bound by a double membrane‚ the nuclear envelope. The nuclear envelope has pores in it to allow the transport of mRNA. The cytoplasm like material is called nucleoplasm which contains chromatin (coils of DNA and histone proteins)‚ it is chromatin that condenses to form chromosomes during cell division. Within the nucleus is a small spherical body called the nucleolus which
Free Cell Endoplasmic reticulum Organelle
Worksheet - Acids‚ Bases and Salts 1. I am pure water. When heated my pH (increases‚ decreases)‚ because more of my water molecules dissociate. 2. I am a 0.020 M solution of weak acid‚ HA. If I only dissociate to the extent of 1.50%‚ what is the value of my Ka? 3. I am a 0.20 M solution of hydrocyanic acid‚ HCN‚ with a Ka of 4.93 x 10¯ 10 . What is my pH? 4. I am a buffer made from 0.10 M acetic acid and 0.15 M sodium acetate. If the Ka for acetic acid is 1.77 x 10¯ 5 ‚ what is my pH? 5. I am
Premium Acid Acid dissociation constant Acetic acid
composed of just one of these substances". Bile is a greenish-brown liquid produced in the liver then stored in the gallbladder which is use to digest fat. Bile contains water‚ cholesterol‚ fat‚ bile salts‚ proteins and a waste product call bilirubin. If the bile has too much cholesterol ‚ bile salt‚ or bilirubin‚ they hardens into stones. There are two types of Gallstones. The first and more common type is known as the Cholesterol Stone‚ which accounts for 80 percent of all cases of Gallstones
Premium Liver Hepatology Cholesterol
increases in complexity? A) ecosystem‚ population‚ organ system‚ cell‚ community‚ molecule‚ organ‚ organism‚ tissue B) cell‚ molecule‚ organ system‚ organ‚ population‚ tissue‚ organism‚ ecosystem‚ community C) organism‚ organ system‚ tissue‚ population‚ organ‚ community‚ cell‚ ecosystem‚ molecule D) molecule‚ cell‚ tissue‚ organ‚ organ system‚ organism‚ population‚ community‚ ecosystem E) ecosystem‚ molecule‚ cell‚ tissue‚ organism‚ organ system‚ organ‚ community Answer: D Topic:
Premium Cell Bacteria Protein
Although many people go through extreme hardship during war‚ they can find things to love that gives them the endurance to pull through. The novel Salt to the Sea by Ruta Sepetys‚ details the story of a group of refugees that are desperately trying to escape the encroaching Russian army who are brutally pillaging‚ raping‚ and massacring everything in their path‚ by getting to the ship the Wilhelm Gustloff. The Wilhelm Gustloff is attacked by a Russian submarine and sinks and only four out of the
Premium Marriage Family Woman
Planning Exercise Aim To investigate the effect of phosphate on cell division in root tips. Background knowledge Phosphate ions (macronutrients) are needed large amounts by plants. They are required for root growth. For the root tips cells to divide‚ mitosis has to occur. Phosphate is needed for production of ATP which provides energy for mitosis to occur. DNA replication occurs during interphase of the cell cycle. DNA is made up of nitrogen containing base‚ pentose sugar and phosphate group
Premium DNA Cell cycle Mitosis
Various types of Fuel Cells and their working By : Divykant Vishwakarma 03996404910 EEE 2nd shift S.No. 14 Fuel Cell A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent. Hydrogen is the most common fuel‚ but hydrocarbons such as natural gas and alcohols like methanol are sometimes used. Fuel cells are different from batteries in that they require a constant source of fuel and oxygen/air
Premium Fuel cell
Site Plan | I. Neurons/nerve cells A neuron is a cell specialized to conduct electrochemical impulses called nerve impulses or action potentials. Neuron is the main cellular component of the nervous system‚ a specialized type of cell that integrates electrochemical activity of the other neurons that are connected to it and that propagates that integrated activity to other neurons. They are the basic information processing structures in the CNS.
Premium Neuron Action potential
plants‚ changing the water that is given to plants can have an effect on a plants growth. In general‚ watering with different liquids has been bad for plants and has damaged their growth. For instance‚ adding salt or sugar to plants can change the growth of a plant. In general‚ salt usually hurts a plant. According to djrice69‚ a poster on Flowerhorn USA‚ an online forum‚ there is already a concentration of salt in the soil. When more salt is
Premium Water
CELL INJURY: CAUSES OF CELL INJURY‚ MECHANISMS OF REVERSIBLE AND IRREVERSIBLE CELL INJURY. CELL INJURY. Causes of cell injury range from gross mechanical external causes to mild endogenous causes as genetic lack of enzymes etc. Virtually all forms of tissue injuries start with molecular or structural alterations in cells. Under normal conditions‚ the cells are in: ❖ homeostastatic „steady“ state Normal cell is confined to relatively narrow range of functions and structure by
Premium Apoptosis