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
paper is to define stress and how it effects the body ’s physiological systems. This paper will include the normal functions and organs involved in the following five physiological systems‚ cardiovascular‚ gastrointestinal‚ respiratory‚ immune and musculoskeletal. This paper will also include a description of a chronic illness associated with each physiological system and how the illness is affected by stress. Stress means different things to different people and stress effects people in different
Premium Blood Heart Immune system
Christine Otieno Estimating Osmolarity of plant Cells(potato and celery)by percentage change in weight Using different sucrose concentrations Introduction The purpose of this experiment was to estimate Osmolality of plants cells i.e. Potato and celery by converting the observed change of weight in different sucrose concentrations. The hypothesis assumes that the solute concentration of the plant samples would be indirectly proportional to the weight; there would be decrease
Premium Chemistry Concentration Solution
Name: ______________________________________ Date: ________________________ Student Exploration: Osmosis Vocabulary: cell membrane‚ concentration‚ diffusion‚ dynamic equilibrium‚ osmosis‚ semipermeable membrane‚ solute‚ solvent Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Suppose you were trapped on a desert island with no sources of fresh water. Should you drink water from the ocean? Explain why or why not. _________________________________________________________________________
Premium Osmosis Concentration
The term oxidative stress has been often used to indicate the outcome of oxidative damage to biologically relevant macromolecules such as: nucleic acids‚ proteins‚ lipids and carbohydrates. This occurs when oxidative stress-related molecules‚ produced in the extracellular environment or within the cell exceed cellular antioxidant defenses (Cadenas‚ 1989). Molecular oxygen can easily accept unpaired electrons giving rise to a group of partially reduced species‚ generally termed ROS. The ROS include:
Premium Immune system Oxygen DNA
STRESS AT WORK Introduction | Methods of Coping & Cure | Information | Related Links | Self Help [pic] Symptoms Causes Coping Skills Burnout Stress at work is a relatively new phenomenon of modern lifestyles. The nature of work has gone through drastic changes over the last century and it is still changing at whirlwind speed. They have touched almost all professions‚ starting from an artist to a surgeon‚ or a commercial pilot to a sales executive. With change comes stress
Premium Stress Occupational health psychology Anxiety
Review Sheet Exercise 1 Cell Transport Mechanisms and Permeability Activity 1: Simulating Dialysis (Simple Diffusion) • Describe two variables that affect the rate of diffusion: Two variables that affect the rate of diffusion are size and concentration gradient. The molecular size vs the MWCO size of the membrane can either increase‚ decrease‚ or prevent diffusion. The greater the concentration gradient the greater the diffusion rate due to molecules moving from areas of higher concentration
Free Diffusion Molecular diffusion Osmosis
generalized eukaryotic plant cell. Indicate the ways in which a nonphotosynthetic prokaryotic cell would differ in structure from this generalized eukaryotic plant cell. Plants are unique among the eukaryotes. The interiors of plant cells‚ like all eukaryotic cells‚ contain numerous organelles‚ which are membrane bounded structures that close off compartments within which multiple biochemical processes can proceed simultaneously and independently. The cell membrane of the plant cell has a phospholipid bilayer
Premium Eukaryote Cell Organelle
ANNA UNIVERSITY: CHENNAI – 600 025 B.E/B.Tech Degree Practical Examinations Oct / Nov – 2012 EC2209 - Data Structures and Object Oriented Programming Lab B.E Electronics and Communication Engineering Regulations - 2008 Time: 3 Hours 1 a Maximum Marks: 100 Write complex class to represent a complex number as an attribute and overload + operator to add two complex numbers as a member function. Test the program with proper inputs from main function. 50 Write a C++ program to sort
Premium
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