30 Questions
How many cells are there in the adult human body?
37,000,000,000,000
What is a common feature of most cells?
They all have different internal structures called organelles
Which unit is considered one of the hardest in the course?
Cells and Tissues
What are organelles in a cell similar to?
Organs in the human body
How big is a human cell typically?
0.025mm
What is the approximate number of cells in an adult human body based on the text?
$3.7 \times 10^{12}$
What is the classification based on the number of layers of cells in epithelial tissue?
Simple
Which type of epithelial tissue looks like it has multiple layers but all cells are actually attached to the basement membrane?
Pseudostratified Columnar
What is the function of cilia in ciliated epithelial tissues?
Assists in material movement around the cell
Which type of tissue has a top layer used to name the entire tissue?
Stratified Squamous
What is the classification of epithelial tissue with more than one layer where only the deepest layer is attached to the basement membrane?
Stratified Cuboidal
Which type of epithelial tissue has cilia on its free surface?
Ciliated Pseudostratified Columnar
What is the main cause of jaundice?
Accumulation of bile in the skin
Which layer of the skin contains sensory receptors?
Papillary layer
What is the function of sebaceous glands?
Produce oil to keep skin and hair soft
Which layer of the skin contains larger blood vessels, hair follicles, and glands?
Reticular layer
What inhibits bacteria in sweat glands?
Low pH (acidic)
In which individuals is jaundice common due to immature livers?
Newborns
What is the function of epithelial tissue?
To protect the body from damage/infection
How many chromosomes do humans have?
46 chromosomes
What is the main information encoded by genes?
Blueprints for proteins
What type of cell doesn't have a specific function other than to divide?
Stem cell
What gives us all unique characteristics according to the text?
The slight differences between actual gene information
How many primary tissue types are mentioned in the text?
Four
What is the main function of the stratum corneum in the epidermis?
Protecting underlying tissues
How are the cells in the stratum corneum different from other skin cells?
They are flat, dead, and filled with keratin
What is the approximate number of skin cells lost per day by an individual?
1 billion cells/day
Which pigment is the main determinant of skin color?
Melanin
Where are melanocytes located in the epidermis?
Stratum basale
What stimulates the over-production of melanin in the skin?
Sunlight exposure and hormones like ACTH
Learn about human cells, primary cell types, primary tissue types, skin layers, and glands in this challenging but rewarding unit. Topics include full description of a human cell, differences between primary cell types, types of cells in primary tissue types, and features of skin layers and glands.
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