Exam 3: Cellular Form and Function

In the glycocalyx,__________ act like identification tags that enable the body to distinguish its own cells from foreign and diseased cells.

Which of these brings nonspecific material into a cell?

Na⁺-K⁺ ATPase is a countertransport antiport carrier,which always requires energy.

Cells were first discovered when a scientist named __________ observed cell walls in cork under a microscope.

A receptor protein in the plasma membrane will not bind to just any chemical in the extracellular fluid,but only to certain ones.This property is called _________.

A patient was severely dehydrated,losing a large amount of fluid.The patient was given intravenous fluids of normal saline.Normal saline is ________ to your blood cells and is about __________ NaCl.

The plasma membrane of cells lining the small intestine has __________,which are specialized for absorption of nutrients.

The plasma membrane is mostly made of molecules that have hydrophilic heads and hydrophobic tails.These molecules are called _________.

Water flows through a selectively permeable membrane in a process called __________,but water molecules cross the membrane more easily through channels of transmembrane proteins called __________.

Both the nucleus and the mitochondrion are surrounded by a two layer membrane.

Cellular membranes are permeable to _________,but impermeable to ___________.

_____________ is the process in which ____________ forces water and small solutes,such as salts,through narrow clefts between capillary cells.

The sodium-glucose transport protein (SGLT)is one example of an active transport process involving a uniport carrier.

A crystal of calcium phosphate in the cytoplasm of a cell should be classified as an inclusion.

The greater the concentration gradient,the faster the diffusion rate.

__________ provide motility to a sperm cell,__________ act as sensory "antennae" in many cells,and ____________ increase a cell's surface area.

Most transmembrane proteins have ___________ regions facing the intra- and extracellular fluid,and __________ regions embedded in the phospholipid bilayer.

Which of the following gives a cell structural support,determines the shape of a cell,and directs the movement of substances through a cell?

The term _____________ refers to a membrane that allows some things to pass through it,but not others.

The most abundant molecules in the plasma membrane are __________.