The watery component of the cytoplasm is called
a. colloidal gel
b. extracellular fluid
c. interstitial fluid
d. protoplasm
e. cytosol
Which of the following is not a function of membrane proteins?
cell nutrient
Components of the cytoskeleton may include all of the following, except
microsomes
Which of the following statements regarding ribosomes is false?
synthesis of the phospholipids
and cholesterol
Which of the following statements about simple epithelia is false?
cover surfaces subjected to mechanical or
chemical stress
The process of forming mRNA is called ?
transcription
Dead skin cells are shed in thin sheets because they are held together by "spots" of proteoglycans reinforced by intermediate filaments. Such strong intercellular connections are called?
desmosomes
The skin swells and puckers during a long bath. This suggests that bath water is a(n) ________ fluid. ?
hypotonic
Which of the following cytoskeleton components moves the chromosomes during cell division?
microtubules
Osseous tissue is also called ?
bone
Mitosis is to somatic cells as meiosis is to ________ cells?
reproductive
The extracellular fluid in most tissues is called the ________ fluid?
interstitial
Cells that store fat are called?
adipocytes
A solution that contains a lower osmotic pressure than the cytoplasm of a cell is called?
hypotonic
Types of skin cancers include?
basal cell carcinoma and malignant melanoma
The stage in a cell's life cycle in which the cell performs its normal functions and prepares for division is called?
interphase
Intercalated discs and striations are characteristic of ________ tissue.?
cardiac
The three types of protein fibers in connective tissue are?
collagen, reticular, and elastic.
Close examination of an organ reveals a lining of several layers of cells. The layers do not contain any blood vessels and one surface of the cells is open to the internal cavity of the organ. This tissue is probably?
epithelium
Simple cuboidal epithelium is found?
forming the kidney tubules.
Epithelial cells lining the internal passageways of the digestive tract usually have ________ at their free surface?
microvilli
Watery perspiration is an example of a(n) ________ secretion?
merocrine
Thin skin contains ________ layer(s) and thick skin contains ________ layers. ?
4; 5
Imagine two rigid chambers separated by a rigid membrane that is freely permeable to water but impermeable to glucose. Side 1 contains a 10 percent glucose solution and side 2 contains pure water. At equilibrium, what will be the situation?
The hydrostatic pressure will be higher in side 1.
All of the following are true of the hypodermis except it ?
...
________ are permanent alterations in a cell's DNA that affect the nucleotide sequence of one or more genes?
mutations
The components of ribosomes are synthesized by ?
nucleoli
________ sweat glands are widely distributed across the body surface, ________ glands are located wherever hair follicles exist, and ________ sweat glands are found only in a few areas. ?
Merocrine, sebaceous, apocrine
When activated, lysosomes function in ?
digestion of foreign material
The genetically programmed death of cells is called?
apoptosis.
Cell membranes are said to be ________ because they allow some substances to pass but not others. ?
selectively permeable
________ attach skeletal muscles to bones, and ________ connect one bone to another?
tendons, ligaments
Most of the ATP required to power cellular operations is produced in the?
mitochondria
________ is when a vesicle fuses to the plasma membrane and discharges its contents to the extracellular environment?
exocytosis
The most dangerous type of skin cancer is termed ?
malignant melanoma
Earwax is produced by ________ glands?
ceruminous
The epithelia that line body cavities and blood vessels are classified as ?
simple squamous
A molecule of ________ contains all the codons needed to produce a particular polypeptide?
mRNA
The body's most delicate type of epithelium is the ________ epithelium?
simple squamous
Specific proteins are manufactured through the interaction of ________ and ________. ?
multiple enzymes, three types of RNA
Functions of the plasma membrane include all of the following except ?
thermal insulation
A surgical incision parallel to the lines of cleavage?
closes and heals with relatively little scarring
Before the mRNA transcribed from a gene can be used to translate into a protein, it must be?
edited to remove introns and transported into the cytoplasm
Glands that discharge an oily secretion into hair follicles are ________ glands. ?
sebaceous
The movement of oxygen from an area of high concentration to an area of low concentration is an example of ?
diffusion
Vitamin ________ is formed in the skin when it is exposed to sunlight?
D
Which of the following connective tissue cells produces collagen?
fibroblasts
________ cells are all of the cells of the body except the reproductive cells (sperm and oocytes). ?
Somatic
All of the following are characteristics of the epidermis except that it is ?
vascularized
The process of protein formation directed by mRNA is called ?
translation
Facilitated diffusion differs from ordinary diffusion in that ?
the rate of molecular movement is limited by the number of available carrier molecules