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A&P Chaper 3


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The three principal parts of the cell are the _____, _____, & _____.
plasma membrane, cytoplasm, nucleus
The fluid portion of cytoplasm is the _____.
The basic structural unit of the plasma membrane is the _______. a. lipid
b. integral protein
c. cholesterol molecule
d. peripheral protein
e. glycoprotein-glycolipid complex
a. lipid
Integral proteins can function in the cell membrane in all the following ways except ______.
a. as a channel
b. as a transporter
c. as a receptor
d. as an exocytosis vesicle e. as a cell-identify marker
d. as an exocytosis vesicle
A cell would lose water volume & shrink if placed in _________. a. a hypertonic solution b. a hypotonic solution c. an isotonic solution d. a hydrophobic solution e. an ionic solution
a. a hypertonic solution
Which of the following statements regarding the nucleus are true? 1. Nucleoli within the nucleus are the sites of ribosome synthesis 2. Most of the cell's hereditary units, called genes, are located within the nucleus 3. The nuclear membrane is a solid,
True Statements: 1, 2, & 5
Somatic cell division resulting in identical daughter cells.
Reproductive cell division that reduces the number of chromosomes by half
microtubular structures extending from the plasma membrane & involved in the movement of materials along the cell's surface
modifies, sorts, packages, & transports molecules synthesized in the rough ER
Golgi complex
Mitochondria are called the powerhouses of the cell because their main function is
A. generating ATP
B. homeostasis
C. hydrolysis
D. motility
a. generating ATP
The movement of water across a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration is called
A. diffusion
B. osmosis
C. endocytosis
D. facilitated diffusion
Which of the following would be most likely to enter a cell by endocytosis?
A. fatty acids
B. lipid-soluble hormones such as estrogen
C. calcium ions
D. viruses such as HIV
d. viruses such as HIV
Microtubules are located in the
A. endoplasmic reticulum
B. cytoplasm and cilia
C. Golgi complex
D. nucleus
B. cytoplasm and cilia
The molecules that make up most of the plasma membrane are
A. proteins
B. cholesterol
C. glycoproteins
D. phospholipids
D. phospholipids
Which type of membrane protein attaches to specific hormones such as insulin?
A. ligand
B. receptor
C. channel
D. anchor
B. receptor
Ions pass across the plasma membrane
A. by dissolving in the phospholipid bilayer
B. because of their small size
C. through channels
D. because they are all water soluble
C. through channels
In primary active transport
A. glucose is moved across membranes with sodium ions
B. energy derived from ATP directly moves a substance across a membrane
C. symports and antiports are involved
D. sodium ions leak across the mem
B. energy derived from ATP directly moves a substance across a membrane
A pump protein moves sodium and potassium ions across the membrane by
A. changing shape
B. rotating
C. flip-flopping
D. breaking down into a smaller molecule
A. changing shape
Receptor-mediated endocytosis involves
A. ligands and specific proteins on the cell surface
B. osmosis
C. movement of tiny droplets of water out of the cell
D. active transport of glucose
A. ligands and specific proteins on the cell surface
In exocytosis, _______ unite with the plasma membrane and release their contents to the outside of the cell.
A. phagosomes
B. secretory vesicles
C. endosomes
D. pinocytic vesicles
B. secretory vesicles
Chemically, the cytosol is 75 - 90 percent
A. water
B. protein
C. phospholipid
D. sodium ions
A. water
Numerous short projections from the surface of cells of the respiratory tract are called
A. flagella
B. microtubules
C. cilia
D. hydrophilic head
c. cilia
A neoplasm that does not metastasize is called a
A. malignant tumor
B. benign tumor
C. carcinogen
D. carcinoma
B. benign tumor

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