Essay about The Human Cell

Submitted By be169
Words: 663
Pages: 3
Open Document
The Human Cell
In this assignment I am going to outline the functions of the main cell components within the human cell.
Cell Membrane
The cell membrane is a protective layer that decides what can enter and leave the cell, it only allows certain substances in and out. It is a phosphor lipid bi layer that surrounds the cytoplasm of the cell. Only small uncharged molecules can pass through the membrane and this is done through a process called diffusion, protein molecules allow substances to pass in and out. Oxygen, Carbon dioxide and fat soluble drugs are some of the small molecules that can pass through the membrane. The structure of the cell membrane is made up of phosphor-lipids which are arranged in two layers which are called bi-layers.
Nucleus
The nucleus is the largest structure inside the cell; it contains DNA which holds genetic information. Almost all of the cells activities are controlled by the nucleus as it provide instructions for protein synthesis. The structure of the nucleus membrane is similar to the structure of the cell membrane but it also contains gaps that allow nucleic acids and proteins to pass through. There are three main parts to the nucleus; the nuclear envelope, chromatin and chromosomes and the nucleoli.
Cytoplasm
The cytoplasm refers to anything inside the cell boundary and outside the nucleus. The cytoplasm is a fluid like material that is similar in consistency to that of gel meaning it can flow slowly throughout the cell. Many chemical reactions take place within the Cytoplasm. The term for the reactions that take place in the cytoplasm is metabolism. The cytoplasm contains various organelles that all have different functions and are essential for the survival of the cell.
Rough Endoplasmic Reticulum
The rough endoplasmic reticulum have ribosomes on their membrane, these ribosomes synthesise proteins.
Smooth Endoplasmic Reticulum
There are no ribosomes on the smooth endoplasmic reticulum which means they are not involved with protein synthesis. The SER carries out many different functions but primarily, the SER is responsible for the making and breaking down of fats.

Golgi apparatus
The Golgi apparatus is a number of fluid filled disk shaped sacs that are stacked and bound by a membrane. The Golgi apparatus sorts, process and packages protein in order to deliver it to other organelles. The Golgi apparatus also produces lysosomes.
Mitochondria
Mitochondria are sausage shaped when looked at under a microscope. They are the main power of the cells as they produce most of the energy that the cell requires in
Show More

Related Documents: Essay about The Human Cell

Human Bio - Stem Cells Essay

stem cells? They are cells that have the ability to produce different types of body cells. Not specialised for particular roles, capable of repeated division by mitosis. Given right conditions, they can differentiate into specialised cells. Replication of cells many times over = profileration 2 Where are stem cells found in the body? In most body tissues - Adult tissue, embryos formed during blastocyst phase of embryological development - eg liver, skin, nerves. 3 Totipotent - A stem cell which…

Words 694 - Pages 3

The General Features of Human Cells Essay

The adaptation of cells to their functions,their size, and shape 1.THE GENERAL FEATURES OF HUMAN CELLS The cell is the structural functional unit of all known living organisms it is the smallest unit of an organism that is classified as a living and is often called the building block of life .Like ourselves, the individual cell that forms our bodies can grow reproduce, process, information, respond to stimuli and carry out an amazing array of chemical reactions ,as the twenty first century…

Words 1735 - Pages 7

human blood cell report Essay

Materials: Prepared blood smear slide (Human thin blood film Games stain), Microscope Procedure: Find a section of blood cells using the 4X and the 10X lens. Examine the blood smear slide under the highest magnification. Note the diameter of the field of view with the 40X lens. Locate an oval erythrocyte. Estimate the diameter of the erythrocyte using the field of view at 40X objective. Locate a leukocyte. Estimate the diameter of an average leukocyte. using the diameter of an erythrocyte…

Words 639 - Pages 3

The Importance Of Cells In The Human Circulatory System

not sufficient to meet demand, so many have evolved a circulatory system, which consists of blood, blood vessels and a heart. Blood is composed of cells and plasma, and is used to transport metabolites, waste products, gases, hormones, and other materials around the body. Most of the cells in the blood are erythrocytes; they are also called red blood cells because they contain hemoglobin, a red respiratory pigment. Hemoglobin is composed of four identical heme groups and four protein (globin) chains;…

Words 734 - Pages 3

The Use Of Human Stem Cell And Drug Research

In using stem cells there are several potential important uses. Human stem cells application can be used for cell-based therapies, and for testing new drugs. There are some differences between Human stem cells and embryonic stem cells. Human stem cells as their name suggest are derived from Adult stem cells are somatic, which means they are found in the body, not the embryo. These stem cells can only develop into the cell types of their original tissue. [1] While embryonic stem cells are derived from…

Words 577 - Pages 3

The Structure And Functions Of Four Of The Main Human Cells

the main human cells; Erythrocytes, Monocyte (white blood cell), Nerve cell (neuron) and Stem cell. According to the endosymbiotic theory by Lynn Margulis eukaryotic cells develop from a combination of unnucleated bacteria which previously survived autonomously. Mitochondria and chloroplasts are two of the main organelles of eukaryotic cells which are descendants of bacteria that once existed. Curley,R. (01 December 2006). This report will explain the ultra structural features of each cell and adaption…

Words 1118 - Pages 5

Stem Cell Research With Human Embryos Essay

Stem Cell Research With Human Embryos Your Name Aultman College ENG 105 Hybrid, College Composition I 10520 Ms. Lyn Sabino Date Stem Cell Research With Human Embryos Abstract In vitro fertilization (IVF) cycles often include ovarian stimulation to produce multiple mature oocytes and, therefore, multiple embryos for transfer, although often only 1 to 2 are used, but never more than 4. Cryopreservation can increase a patients chance to have other IVF procedures in the future. However, patients…

Words 1952 - Pages 8

Cloning: Cloning and Human Liver Cell Essay

the potential of the stem cell, harvesting it and seizing its power is only natural. However, they are difficult to amass and gather them up into one place due to their unavailability during a human’s lifespan. Stem cells are mostly found in bone marrow in an adult. Outside of that, they are found within an embryo as well as inside an umbilical cord for a few days following birth. Over the last 30 years, stem cells have been cloned through a technique called somatic cell nucleic transfer (SCNT). This…

Words 1367 - Pages 6

"Repoductive Cloning vs. Therapeutic Cloning" Human being or stem cells Essay

think of human cloning, they often think of an identical copy of a human being but there are two kinds of human cloning. Human cloning (also known as reproductive cloning) is the manufacturing of a genetically identical copy of a human. In contrast to the goal of reproductive cloning, therapeutic cloning is the cloning of human cells (stem cells) or human tissue. Therapeutic cloning is a phrase for a procedure known as somatic cell nuclear transfer. (Murnaghan 2014) The ethics of human cloning is…

Words 820 - Pages 4

Pluripotent Stem Cells

Pluripotent Stem Cell Induction of Pluripotent stem cells is one of the most controversial topics that many Biology scientists want to discover. In the article titled “Induction of Pluripotent Stem Cells from Adult Human Fibroblasts by Defined Factors,” scientists do the research on how to develop the pluripotent stem cells from somatic cells (Takahashi et al. 2007). Induction of Pluripotent Stem cells is the process that reprograms human somatic cells into pluripotent stem cells so that they may…

Words 765 - Pages 4