Cells and Tissues Unit: Understanding Human Cell Description and Primary Tissues

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How many cells are there in the adult human body?

100 million
1 billion
37,000,000,000,000 (correct)
10,000

What is a common feature of most cells?

They are all visible without a microscope
They all have the same shape
They all have different internal structures called organelles (correct)
They all function in exactly the same way

Which unit is considered one of the hardest in the course?

General Biology
Human Anatomy
Cells and Tissues (correct)
Genetics

What are organelles in a cell similar to?

Organs in the human body (C) Signup and view all the answers

How big is a human cell typically?

0.025mm (D) Signup and view all the answers

What is the approximate number of cells in an adult human body based on the text?

$3.7 \times 10^{12}$ (C) Signup and view all the answers

What is the classification based on the number of layers of cells in epithelial tissue?

Simple (C) Signup and view all the answers

Which type of epithelial tissue looks like it has multiple layers but all cells are actually attached to the basement membrane?

Pseudostratified Columnar (B) Signup and view all the answers

What is the function of cilia in ciliated epithelial tissues?

Assists in material movement around the cell (C) Signup and view all the answers

Which type of tissue has a top layer used to name the entire tissue?

Stratified Squamous (A) Signup and view all the answers

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 (C) Signup and view all the answers

Which type of epithelial tissue has cilia on its free surface?

Ciliated Pseudostratified Columnar (B) Signup and view all the answers

What is the main cause of jaundice?

Accumulation of bile in the skin (B) Signup and view all the answers

Which layer of the skin contains sensory receptors?

Papillary layer (C) Signup and view all the answers

What is the function of sebaceous glands?

Produce oil to keep skin and hair soft (C) Signup and view all the answers

Which layer of the skin contains larger blood vessels, hair follicles, and glands?

Reticular layer (C) Signup and view all the answers

What inhibits bacteria in sweat glands?

Low pH (acidic) (B) Signup and view all the answers

In which individuals is jaundice common due to immature livers?

Newborns (A) Signup and view all the answers

What is the function of epithelial tissue?

To protect the body from damage/infection (A) Signup and view all the answers

How many chromosomes do humans have?

46 chromosomes (D) Signup and view all the answers

What is the main information encoded by genes?

Blueprints for proteins (A) Signup and view all the answers

What type of cell doesn't have a specific function other than to divide?

Stem cell (C) Signup and view all the answers

What gives us all unique characteristics according to the text?

The slight differences between actual gene information (A) Signup and view all the answers

How many primary tissue types are mentioned in the text?

Four (D) Signup and view all the answers

What is the main function of the stratum corneum in the epidermis?

Protecting underlying tissues (D) Signup and view all the answers

How are the cells in the stratum corneum different from other skin cells?

They are flat, dead, and filled with keratin (C) Signup and view all the answers

What is the approximate number of skin cells lost per day by an individual?

1 billion cells/day (A) Signup and view all the answers

Which pigment is the main determinant of skin color?

Melanin (C) Signup and view all the answers

Where are melanocytes located in the epidermis?

Stratum basale (B) Signup and view all the answers

What stimulates the over-production of melanin in the skin?

Sunlight exposure and hormones like ACTH (A) Signup and view all the answers