8.3-8.4 bio review
the cell membrane contains channels and pumps that help move materials from one side to the other. what are these channels and pumps made of
proteins
which of the following is a function of the cell membrane
regulates the movement of materials into and out of the cell
in the human digestive system, the stomach, pancreas, and intestines work together. Which of the following is an example of a tissue in the digestive system
smooth muscle that lines the stomach
the model shows a substance crossing a cell membrane which of the following describes the process
the model shows the process of diffusion because solute particles are moving from an area of high concentration to an area of low concentration
multicellular organisms contain organ systems. which of the following BEST describes the organs in an organ system
the organs in an organ system work together to perform a specific function
An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes
water to move into the cell
a cell is placed in an isotonic solution. How does the cell maintain homeostasis in this environment
water will move across the cell membrane in both directions because the concentrations of solute particles inside and outside the cell are the same
an organ system is a group of organs that
work together to perform a specific function
which of the following is an example of an organ
heart
which term describes the relatively constant internal physical conditions of an organism
homeostasis
Diffusion occurs because
molecules constantly move and collide with each other
the diffusion of water across a selectively permeable membrane is called
osmosis
A group of similar cells that perform a particular function is called
a tissue
the cells of unicellular organisms are
able to carry out all of the functions necessary for life
Which means of particle transport is shown in Figure 7-4 above?
active transport
Which means of particle transport requires input of energy from the cell?
active transport
which of the following structures serves as the cell's boundary from its environment
cell membrane
which of the following activities is NOT a way that unicellular organisms maintain homeostasis
cell specialization
Which list represents the levels of organization in a multicellular organism from the simplest level to the most complex level?
cell, tissue, organ, organ system
During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will
continue to move across the membrane in both directions
Which means of particle transport is shown in Figure 7-5 above?
endocytosis
