Ch. 7 Study Questions
What is the relationship between diffusion and osmosis?
In both diffusion and osmosis molecules move from an area of higher concentration to an area flower concentrstion.
Explain the relationship among cell specialization, multicellular organisms, and homeostatis
The cells of multicellular organisms become specialized for particular tasks and communicate with one another to maintain homeostasis
How are prokaryotic and eukaryotic cells alike? How do they differ?
alike: contain DNA Differ: prokaryotic cells do not separate their genetic material with a nucleus. Eukaryotic cells seperate their genetic material using the nucleus
The nucleus includes all of the following structures except A) cytoplasm B) DNA C) a nuclear envelope D) nucleolus
A) cytoplasm
Cell membranes consist mainly of A) lipid bilayers B) protein pumps C) carbohydrates D) protiens
A) lipid bilayers
The difference between prokaryotic and eukaryotic cells involves the presence of A) a nucleus B) genetic material in the form of DNA C) chloroplasts D) a cell membrane
A) nucleus
A tissue is composed of a group of A) similar cells B) related organelles C) organ systems D) related organs
A) similar cells
What is the difference between passive transport and active transport?
Active transport requires energy and passive transport does not
Despite differences in size and shape, at some point all cells have DNA and a A) cell wall B) cell membrane C) mitochondria D) nucleus
B) cell membrane
Animal cells have all of the following except A) mitochondria B) chloroplast C) a nucleus D) membrane
B) chloroplast
Which process always involves the movement of materials from inside the cells to outside the cell? A) phagocytosis B) exocytosis C) Endocytosis D) osmosis
B) exocytosis
The organelles that break down lipids, carbohydrates, and proteins into small molecules that can be used by the cell are called A) vacuoles B) lysosomes C) ribosomes D) microfilaments
B) lysosomes
What distinguishes a eukaryotic cell from a prokaryotic cell is the presence of A) cell wall B) nucleus C) DNA D) ribosomes
B) nucleus
Which of the following is true of all single-celled organisms? A) they are all prokaryotes B) they are all bacteria C) they all reproduce D) they all have a nucleus
B) they are all bacteria
The human brain is example of a(n) A)cell B) tissue C) organ D) organ system
B) tissue
In eukaryotic cells,chromosomes carrying genetic information and found in the A) ribosomes B) lysosomes C) nucleus D) cell membrane
C) nucleus
A substance that moves by passive transport tends to move A) away from the area of equilibrium B) away from the area where it is less concentrated C) away from the area where it is more concentrated D) toward the area where it is more concentrated
C) way from the area where it is more concentrated
Which of the following is an example of active transport? A) facilitated diffusion B) osmosis C) diffusion D) endocytosis
D) endocytosis
The movement of water molecules across a selectively permeable membrane is known as A) exocytosis B) phagocytosis C) endocytosis D) osmosis
D) osmosis
Which cell structures are sometimes found attached to the endoplasmic reticulu? A) chloroplasts B) nuclei C) mitochondria D) ribosomes
D) ribosomes
In many cells, the structure that controls the cells activities is the A) cell membrane B) organelles C) nucleolus D) nucleus
D)nucleus
Describe the process of diffusion with a detailed description of equilibrium
Diffusion is the process by which particles move from an area of high concentration to an area of lower concentration. Equilibrium is reached one the concentration of the substance on both sides of the cell membrane is the same. Even when equilibrium is reached, particles of a solution continue moving across the membrane in both directions.
What is the function of a ribosome?
Produce proteins by following coded instructions that come from DNA
Describe the role of the Golgi apparatus
The Golgi apparatus modifies, sports, and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell
Describe the relationship between cells, organs, tissues, and organ systems
The specialized cells of multicellular organisms are organized into tissues, then into organs, and finally into organ systems
By definition, what is the only substance that undergoes osmosis?
Water
