Week 1 Quiz 2 – Chapter 2 & 3 Practice Flashcards
the term ___ refers to a membrane that allows some things to pass through it, but not others
selectively permeable
the number of particles of a solute in a solution is described by its ___.
The ability of a solution to affect the fluid volume in a cell is referred to as its ___
osmolarity
tonicity
T or F:
microvilli and cilia differ in their function, but have the same internal structure
false
a protein that is bound to a carbohydrate is called a ___
glycoprotein
T or F:
a crystal of calcium phosphate in the cytoplasm of a cells should be classified as an inclusion
true
water flows thru a selectively permeable membrane in a process called ___,
but water molecules cross the membrane more easily thru channels of transmembrane proteins called ___.
osmosis
aquaporins
T or F:
ribosomes are made of proteins and RNA
true
proteins that do not protrude into the phospholipid bilayer, but adhere to the surface of the plasma membrane, are called ___.
peripheral proteins
T or F:
in most cells, the nucleus is the largest organelle
true
T or F:
a cell’s second messengers serve to transport material thru cellular membranes
false
___ provide motility to a sperm cell, and ___ act as sensory “antennae” in many cells, and ___ increase a cell’s surface area.
flagella
cilia
microvilli
the fluid outside of a cell is called ___
extracellular fluid
the sodium-potassium (Na+/K+) pump transports both sodium and potassium ___ their concentration gradients in a process called ___.
up
active transport
___ is the process in which ___ forces water and small solutes, such as salts, through narrow clefts b/n capillary cells
filtration
hydrostatic pressure
what do facilitated diffusion and active transport have in common?
both are examples are carrier-mediated transport
