The cell membrane is dscribed as a fluid mosaic. Protiens have a degree of mobility within the lipid bilayer.
The first and second setnence are true. The second is relevant to the first.
which particle can penetrate cell membranes easily?
lipid soluble, transport protein present
For a cell to engage in active transport processes it requires
mitochondria, appropriate fuel, ATP, and enzymes
Which is inconsistent with the others??
Phagocytosis...the others all had to do with diffusion, filtration, osmosis, and facilitated diffusion
Which can transport substances uphill again the concentration gradient ?
serve as repositories for some receptors, provide route for all transport into a cell, and relay signals into cells
Which statement is true for cytoplasm ?
it lis located outside the nucleus, provides support for the organelles and is mostly water
The retinoblastoma (Rb) protein?
is a brake in teh progress of the cell cycle , binds to gene regulatory proteins, and slows cell proliferation
A major function of connective tissue is ?
support and binding
Which are charateristics of epithelial tissue?
protection and secretion
Increase cyptoplasmic calcium??
decreases permability at the junctional complex
coordinate activities of cells within tissues and hold cells together
The eight specialized cellular functions are:
mocement, conductivity, metabolic, absorption, secretion, excretion, respiration, reproduction, and communication
What is ATP??
it functions as an energy transferring molecule. Energy is stored by molecules of carbs, lipids, and protein which when catabolized transefer energy to ATP
What is oxidative phophorlation?
it occurs in the mitochondria and is the mechanism by which the energy produced from the carbs, fats, and proteins is transferred to ATP.
The four basic types of tissue?
epithelial, muscle, nerve, and connective tissue
What is neural tissue?
is is composed of highly specialized cells called neurons that recieve and transmit electrical impulses rapidly across junctions called synapses
What is the purpose of epithelial tissue?
it covers mos the the internal and external surfaces of the body. It also protects, absorps, and excretes
What is the purpose of connective tissue?
It binds and connects various tissues and organs together, supporting them in their locations and serving as storage sites for excess nutrients.
What is the purpose of muscle cells?
it is composed of long, thin, highly contractile cells or fibers called myocytes. Muscle tissue that is attached to bone enables voluntary movement. In the internal organs it enables involuntary movement such as the heart