AP Bio Chapter 4 and 5
If a toxin such as bacterial toxin destroys ribosomes, what cellular activity will be affected first?
protein synthesis
eukaryote
organalles, plant cell, animal cells
Nucleolus
site of ribosmal subunit sunthesis
Organelle works to detoxify cells and is found in large number in organs such as liver and kidneys
smooth endoplasmic reticulum
The function of the plasma membrane is to
a serve as a highly selective barrier, allows cells to accumulate materials and energy
Its advantages for cells to be small because
a small cell has a small volume relative to surface area, thereby increasing efficient transport
smallest unit that can carry out all activities we associate with life is
cells
If a plant cells are immersed in distilled water the resulting movement of water into the cells is called
conduction
One function of peroxisomes involves the process of
detoxification
What is the primary role of Lysosomes?
digest food, clean up and recycle and digest broken organelles
Gap junctions
form channels that allow communications between the cytoplasm of adjacent animal cells
plasmodesmata
form channels that allow communications between the cytoplasm of adjacent plant cells
one strategy that allows larger cells to have an effective surface area to volume ratio is
having thin, finger-like projections
3 macromolecules that are components of the plasma membrane
lipids-the protection cell transport proteins-cell transport allowing bigger molecules through the membrane carbohydrates-identification cell to cell signaling
prokaryote
no orgnalles, bacteria and fungi
What is composed of two layers of phospholipids associated with proteins integrated within or attached to these layers?
plasma membrane
The process in which cells convert and amplify an extra cellular signal into an intracellular signal
signal transduction
Cell signaling process
synthesis and release if signaling molecules,transport to target cells, response by the cell, termination of signaling
the smooth endoplasimic reticulum
synthesizes lipids
Membranes facilitate
the formation of energy-yielding gradients, act as barriers to ions, acting as important "work branches" within cells, maintaining
