Biology Ch 4 and 5

The purpose of cellular respiration is the production of _____.

ATP

Your intestine is lined with individual cells. No fluids leak between these cells from the gut into your body. Why?

The intestinal cells are bound together by tight junctions

Peroxisomes are organelles that are involved in the _____

breakdown of fatty acids

Basal bodies are most closely associated with which of the following cell components?

cilia

What are the inner folds of the mitochondria called?

cristae

Where would you expect to find contractile proteins in a cell?

cytoskeleton

Cilia and flagella move due to energy provided by the enzymatic breakdown of ATP by _____

dynein arms

Which of the following structures is directly involved in the passage of electrical signals between cells as, for example, in the vertebrate heart?

gap junctions

Mitochondria and chloroplasts are similar in that they both _____; they are different in that chloroplasts, but not mitochondria, _____.

have a double membrane ... carry out photosynthesis

Primary ciliary dyskinesia is a genetic disorder in which the cilia of the respiratory tract become immobile. As a result, these individuals suffer respiratory illnesses. This is because the cells _____.

lack dynein arms

The protein actin is a component of a(n) _____

microfilament

Integrins are proteins that are responsible for integrating changes that are occurring outside and inside the cell. They are able to do this because of _____.

microfilaments

The general function of _____ is the breakdown of substances.

peroxisomes

Dye injected into a plant cell might be able to enter an adjacent cell through a(n) _____.

plasmodesma

The cell junctions in plant cells that provide channels between adjacent cells are generally _____

plasmodesma

You would expect a cell with an extensive Golgi apparatus to _____.

secrete a lot of material

Membrane proteins are synthesized by ribosomes that are attached to _____

the endoplasmic reticulum