Ch 3 Mastering A&P

Ribosomes are found __________

in the cytosol and on the rough endoplasmic reticulum

Pinocytosis is a type of__________

endocytosis

Match the structure with its function: Microtubules of the cytoskeleton

Determine the overall shape of the cell as well as distribution of cellular organelles

The sodium-potassium pump helps to maintain the concentration gradients for sodium and potassium ions across the plasma membrane. Select the true statement regarding the sodium-potassium pump.

For each molecule of ATP used, the pump moves three positively charged sodium ions out of the cell

Correctly match the term and definition: Cilia

Motile cellular extensions found in large numbers in some epithelial cells

Match the term with its definition: Osmotic pressure

The force that solutes have to attract water

Which of the following is true with regard to membrane potential?

Transient opening of gated Na+ and K+ channels in the plasma membrane is a normal means of activating neurons and muscle cells.

Crenation takes place when a cell is placed in __________

a hypertonic solution

What histological structure immediately surrounds a central canal in compact bone?

bone lamellae

The resting membrane potential is mainly determined by

the concentration gradient of K+ and the differential permeability of the plasma membrane to K+ and other ions

The underlying cause of Tay-Sachs disease is __________.

the lysosomes lack an enzyme needed to break down a specific glycolipid in nerve cell membranes