Human Physiology Chapter 3 Part 1
E
A liposome is A) only an additive to creams and lotions. B) only a drug-delivery vehicle. C) only a type of lipid. D) only a structural component of cell membranes. E) an additive to creams and lotions and a drug-delivery vehicle.
C
An immunoliposome is a liposome that A) suppresses the immune system. B) stimulates the immune system. C) can recognize cancer cells. D) None of the answers are correct.
C
Cell membranes are said to be A) impermeable barrier. B) freely permeable barrier. C) selectively permeable barrier. D) only permeable to water soluble molecules. E) None of the answers are correct.
D
Each of the following statements concerning mitochondria is true except one. Identify the exception. A) The mitochondrial cristae form the inner membrane forming separate compartments. B) The matrix of the mitochondria contains metabolic enzymes involved in energy production. C) The intermembrane space plays an important role in mitochondrial ATP production. D) The mitochondria contain no DNA or RNA. E) The mitochondria produce most of a cell's ATP
D
In humans, only ________ cells have flagella. A) respiratory tract lining B) intestine lining C) stomach lining D) sperm E) uterine tube lining
E
Intermediate filaments A) provide the cell with strength. B) stabilize the position of organelles. C) transport materials within the cytoplasm. D) form the neurofilaments in nerve cells. E) All of the answers are correct.
E
Ribosomal RNA is formed by A) the endoplasmic reticulum. B) Golgi complexes. C) lysosomes. D) mitochondria. E) nucleoli.
C
Tay-Sachs is a disease caused by having ineffective A) mitochondria. B) Golgi bodies. C) lysosomes. D) rough endoplasmic reticulum. E) smooth endoplasmic reticulum.
B
The lumen of a hollow organ such as the stomach is considered to be part of the ________ environment. A) internal B) external
B
The space that is surrounded by the tissue wall of hollow organs is known as the A) peritoneal cavity. B) lumen. C) extracellular space. D) epidural space. E) tract.
A
The thickest protein fibers from the following group are A) microtubules. B) neurofilaments. C) microfilaments. D) myosin molecules. E) keratin filaments.
C
The watery medium that surrounds a cell is known as A) cytosol. B) protoplasm. C) extracellular fluid. D) cytoplasm. E) plasma.
E
What is/are the major role(s) of the phospholipid bilayer in the cellular membrane? A) the absorption of fats only B) the formation of a barrier that is selectively permeable to lipid-soluble molecules only C) to provide a framework for membrane proteins only D) to carry water-soluble molecules through a hydrophobic environment only E) the formation of a barrier that is a selective for lipid-soluble molecules and to provide a framework for membrane proteins
B
When cancer develops in one tissue and spreads to another via the blood or the lymph, the cancer is said to have undergone what process? A) differentiation B) metastasis C) cytokinesis D) mutation
E
Which of the following is NOT a function of membrane proteins? A) respond to extracellular molecules B) creating junctions between cells C) act as transport molecules for various solutes D) anchor or stabilize the cell membrane E) produce energy
D
Which of the following is NOT a membrane lipid? A) sphingolipids B) cholesterol C) phospholipids D) All are membrane lipids.
A
Which of the following is an example of a membranous organelle? A) lysosome B) cilia C) centriole D) ribosome E) cytoskeleton
A
Which of the following terms is NOT used to define the structure that separates the contents of a human cell from its surrounding medium? A) a cell wall B) a cell membrane C) plasma membrane D) plasmalemma E) All of the answers are correct.
A
Which proteins assist in the movement of vesicles along microtubules? A) kinesins B) mitochondria C) rough endoplasmic reticulum D) ribosomes E) Golgi complex
D
Which structure is a lipid bilayer that controls which objects can leave or enter the cell? A) endoplasmic reticulum B) Golgi apparatus C) nucleus D) plasma membrane E) ribosome
