Biology Chp. 4, 5, 10

active transport

Which of the following processes can move a solute against its concentration gradient?

The endosymbiosis hypothesis process that

A small cell divided inside a larger cell to the benefit of both cells.

Using the data from the graphs and what you know about membranes and metabolic pathways, predict which of the following is the likely reason why actions of aquaporins in a membrane can change so rapidly.

Aquaporins are inserted into the membrane as needed.

exocytosis

Certain cells that line the stomach synthesize a digestive enzyme and secrete it into the stomach. This enzyme is a protein. Which of the following processes could be responsible for its secretion?

Cilia is different from Flagella in that

Cilia are typically more numerous and shorter than Flagella.

Which of these statements describes what occurs in facilitated diffusion?

Facilitated diffusion of solutes occurs through protein pores in the membrane.

Collegan

Is the most prevalent glycoprotein in the extracellular matrix

Macrophages are white blood cells that roam the body searching for invading microbes. Inside macrophage vacuoles these invaders are destroyed. How do the microbes get inside the macrophages?

Microbes are engulfed into the macrophage via phagocytosis.

Which of the following is true about cytoskeleton

The cytoskeleton is composed of three types of fibers microfilament, microtubules, and intermediate filaments. Cytoskeleton play an important role in amoeboid motion, and the cytoskeleton helps to support your cells.

Biologists use the fluid mosaic model to describe membrane structure.

The diverse proteins found in and attached to membranes perform many important functions. The framework of a membrane is a bilayer of phospholipids with their hydrophilic heads facing the aqueous environment inside and outside of the cell and their hydrophobic tails clustered in the center. Because membranes are fluid, membrane proteins and phospholipids can drift about in the membrane. Submit

Endoplasmic Reticulum (ER), plasma membrane, Golgi apparatus

The endomembrane system includes all of the following organelles.

Integrins

The extracellular matrix attached to cells via glycoproteins may then bind to Integrins in the plasma membrane.

cellular respiration

The function of mitochondria is

receptor-mediated endocytosis Submit

Which of the following enables a cell to pick up and concentrate a specific kind of molecule?

The concentration of solutes in a red blood cell is about 2%. Sucrose cannot pass through the membrane, but water and urea can. Osmosis would cause red blood cells to shrink the most when immersed in which of the following solutions?

a hypertonic sucrose solution

In this diagram of the plasma membranes of two adjoining cells, identify the protein indicated by the white arrow, including its function.

a receptor protein that binds with a signaling molecule and relays the message into the cell by activating other molecules inside the cell. Signaling proteins are part of signal transduction pathways that transmit external chemical signals into the cell.

Aquaporins

allow water to cross the plasma membrane via facilitated diffusion.

ATP synthesis decreases

cyanide inhibits mitochondrial function; as a result, the rate of

When two aqueous solutions that differ in solute concentration are placed on either side of a semipermeable membrane and osmosis is allowed to take place, the water will

exhibit a net movement to the side with lower free water concentration

which of the following components is external to the plasma membrane?

extracellular matrix

A plant cell placed in a(n) __________________________ will lose water and plasmolyze.

hypertonic solution

There is a net diffusion of water out of an animal cell when it is placed in a(n

hypertonic solution

The ideal osmotic environment for a plant cell is a(n)

hypotonic environment.

An animal cell placed in a(n)___________________ will gain water, swell, and possibly burst.

hypotonic solution

The ideal osmotic environment for an animal cell is a(n)

isotonic enviornment

A plant cell surrounded by a(n)__________________ will be flaccid (limp).

isotonic solution

Break down fatty acids

peroxisomes are organelles that are involved in the

Osmosis is often viewed incorrectly as a process driven directly by differences in solute concentration across a selectively permeable membrane. What really drives osmosis?

the difference in water concentration across a selectively permeable membrane

You are working on a team that is designing a new drug. For this drug to work, it must enter the cytoplasm of specific target cells. Which of the following would be a factor that determines whether the molecule selectively enters the target cells?

the similarity of the drug molecule to other molecules that are transported into the target cells.