What is a cell GCSE biology?
What is a cell GCSE biology?
Animal cells Animals are made up of cells. These cells are eukaryotic . This means they have a nucleus and other structures which are surrounded by membranes . A jelly-like material that contains dissolved nutrients and salts and structures called organelles. It is where many of the chemical reactions happen.
What is a tissue GCSE?
Description. Specialised cells grouped together with the same function are described as tissues. Muscles cells are given as an example. An organ is described as a group of tissues with the same function.
What is a nerve cell BBC Bitesize?
Nerve cells transmit electrical signals. They are well suited to their function because: They are thin, and can be more than 1 metre long. This means they can carry messages up and down the body over large distances.
What is the function of the cell membrane GCSE?
Cell structures and their functions
|Cell membrane||Its structure is permeable to some substances but not to others. It therefore controls the movement of substances in and out of the cell.|
|Mitochondria||Organelles that contain the enzymes for respiration, and where most energy is released in respiration.|
Which is bigger tissue or organ?
The levels of organization in the human body consist of cells, tissues, organs, organ systems and finally the organism. The smallest unit of organization is the cell. The next largest unit is tissue; then organs, then the organ system. Finally the organism, is the largest unit of organization.
What are the four basic types of tissues in the human body?
There are 4 basic types of tissue: connective tissue, epithelial tissue, muscle tissue, and nervous tissue. Connective tissue supports other tissues and binds them together (bone, blood, and lymph tissues). Epithelial tissue provides a covering (skin, the linings of the various passages inside the body).
What are the functions of the cell body?
Functions of the Cell Body. They make all the energy the cell needs to carry out its function. Neurons need energy to send and receive signals from other neurons. Microtubules are long chains of protein that the cells use to transport materials. The soma is the starting point for these protein highways in the cell.
How big are the cells in the human body?
How big are cells? Cells can vary greatly in size. You need a microscope to see most human cells. Red blood cells are some of the smallest cells in the human body. These have a diameter of 0.008 mm, meaning a line of 125 red blood cells is only 1 mm long.
What makes up the surface of a cell?
The unique proteins on the surface of a cell, that are recognised by the immune system as ‘self’ or ‘non-self’. Gas made through the action of microorganisms on the remains of living organisms. The membrane around a cell which controls what moves in and out of the cell.
How are cells different from tissues and organs?
Cells, tissues and organs Structure Description Organelle Cell structure that is specialised to ca Cell Basic structural and functional unit of Tissue Group of cells with similar structures, Organ Structure made up of a group of tissues,