Chap 4/5

Question 1

What are the four main types of tissues in the human body?

Answer 1

• Epithelial tissue
• Connective tissue
• Muscle tissue
• Nervous tissue

These tissues perform different functions and have distinct characteristics.

Question 2

What is the primary function of epithelial tissue?

Answer 2

Covers surfaces and lines organs

Epithelial tissue acts as a barrier and is involved in absorption, secretion, and sensation.

Question 3

What are some examples of connective tissue?

Answer 3

• Blood
• Bone
• Cartilage
• Adipose

Connective tissue provides support and structure to other tissues and organs.

Question 4

What is the role of muscle tissue?

Answer 4

Movement

Muscle tissue is responsible for the movement of the body and its parts.

Question 5

What type of tissue is responsible for communication in the body?

Answer 5

Nervous tissue

Nervous tissue includes neurons that transmit signals throughout the body.

Question 6

What distinguishes endocrine glands from exocrine glands?

Answer 6

• Endocrine glands: Secrete hormones directly into the bloodstream
• Exocrine glands: Secrete substances through ducts

Examples include the thyroid (endocrine) and sweat glands (exocrine).

Question 7

What is the outermost layer of the epidermis called?

Answer 7

Stratum corneum

This layer consists of dead keratinized cells that serve as a barrier against pathogens.

Question 8

What is the function of the stratum granulosum?

Answer 8

Produces keratohyalin; contributes to water resistance

This layer plays a key role in the skin’s barrier function.

Question 9

What does the stratum spinosum provide?

Answer 9

Strength and flexibility

This layer contains desmosomes that help maintain the integrity of the skin.

Question 10

What is the deepest layer of the epidermis and what does it contain?

Answer 10

Stratum basale; contains melanocytes and stem cells

This layer is the site of cell division and contributes to skin pigmentation.

Question 11