cell phys quiz Flashcards
some human cells have cilia, which:
sweep materials across the cell surface
the function of proteins in cell membranes is to:
form pores or channels, form receptor sites for hormones, and to be carrier enzymes
the cell organelle that synthesizes carbohydrates and secretes cell products is the:
Golgi apparatus
the cell organelle that transports materials within a cell is the:
endoplasmic reticulum
the cell organelles that break down damaged or misfolded proteins are the:
proteasomes
the mitochondria are cell organelles that:
are the site of cell respiration
the nucleus is the control center of the cell because it contains:
DNA in the chromosomes
chromosomes are made of ____ and are found in the _____ of cells
DNA/nucleus
facilitated diffusion depends on:
transporters that are part of the cell membrane
the process of facilitated diffusion is important to:
enable most body cells to take in glucose
the process of filtration is important to:
form tissue fluid and bring nutrients to tissues
the process of filtration is also important to:
form urine in the kidneys
the movement of molecules from an area of greater concentration to an area of lesser concentration is called:
diffusion
the energy for diffusion is provided by:
the free energy, or natural movement of molecules
the movement of molecules from an area of lesser concentration to an area of greater concentration is called:
active transport
the process of active transport is important to:
enable cells of the kidneys to reabsorb small proteins
the process of osmosis involves:
the diffusion of water through a membrane
the process of osmosis is important to:
permit the kidneys to reabsorb water
before mitosis can take place, what must happen?
DNA replication must create two sets of chromosomes
human cells that seem to be unable to undergo extensive mitosis are:
muscle and nerve cells
meiosis takes place in the:
ovaries or testes
in protein synthesis, a function of ribosomes is to:
form peptide bonds between amino acids
the movement of water and dissolved materials through a membrane from an area of high pressure to an area of low pressure is called:
filtration
the energy for the process of filtration is provided by:
blood pressure in the capillaries
the process of active transport is important to:
enable cells of the small intestine to absorb glucose and amino acids
the sodium pumps of nerve cells rely on the process of:
active transport
