BIOD 151 Module 7 Exam Review 2026 | Verified Q&A |
Graded A+
1. A contusion is an injury that occurs when:
A flap of skin is torn away from the body.
Blood vessels beneath the skin are broken.
The skin is rubbed across a rough surface.
A small or large vein has been lacerated.
2. If a person has a deficiency in keratin production, what effect might this have
on their hair?
Hair may grow faster and thicker.
Hair may become weak and brittle.
Hair may become more elastic and resilient.
Hair may change color to a lighter shade.
3. What is a contusion?
none of the above
Is an injury to a ligament and is often caused by a wrench or twist
is an injury to the soft tissue often produced by a blunt force such
as a kick, fall, or blow.
is an injury to a muscle or tendon, and is often caused by overuse,
force, or stretching.
4. What substance do fibroblasts primarily secrete in the skin?
Elastin
, Collagen
Keratin
Melanin
5. Describe the role of the epidermis in protecting the body.
The epidermis absorbs nutrients from the environment.
The epidermis acts as a barrier to protect underlying tissues from
environmental damage and pathogens.
The epidermis produces hormones for skin health.
The epidermis regulates body temperature through sweat production.
6. If a patient has a deep cut that heals with a noticeable scar, what factors
might influence the appearance and texture of that scar?
Factors such as the depth of the injury, the individual's healing
process, and the location of the scar can influence its appearance
and texture.
The type of bandage used has no effect on the scar.
The color of the patient's skin is the only factor that influences scar
texture.
Only the age of the patient affects the scar's appearance.
7. Describe the significance of the nail matrix in nail growth and health.
The nail matrix protects the nail from infections.
The nail matrix is crucial for nail growth as it contains the cells that
produce new nail tissue.
The nail matrix is responsible for the color of the nail.
, The nail matrix helps in the sensation of touch.
8. Describe the composition of nails and explain why they are considered dead
cells.
Nails consist of melanin, which gives them color.
Nails are primarily made of collagen, which provides flexibility.
Nails are composed of keratin, a tough protein, and are considered
dead cells because they lack blood supply and nerve endings.
Nails are made of living cells that constantly divide and grow.
9. What substance are nails primarily made of?
Melanin
Keratin
Elastin
Collagen
10. What substance from the blood accumulates to form a clot?
White blood cells
Macrophages
Red blood cells
Platelets
11. What is the primary component of the hypodermis?
Nervous tissue
Adipose tissue
Graded A+
1. A contusion is an injury that occurs when:
A flap of skin is torn away from the body.
Blood vessels beneath the skin are broken.
The skin is rubbed across a rough surface.
A small or large vein has been lacerated.
2. If a person has a deficiency in keratin production, what effect might this have
on their hair?
Hair may grow faster and thicker.
Hair may become weak and brittle.
Hair may become more elastic and resilient.
Hair may change color to a lighter shade.
3. What is a contusion?
none of the above
Is an injury to a ligament and is often caused by a wrench or twist
is an injury to the soft tissue often produced by a blunt force such
as a kick, fall, or blow.
is an injury to a muscle or tendon, and is often caused by overuse,
force, or stretching.
4. What substance do fibroblasts primarily secrete in the skin?
Elastin
, Collagen
Keratin
Melanin
5. Describe the role of the epidermis in protecting the body.
The epidermis absorbs nutrients from the environment.
The epidermis acts as a barrier to protect underlying tissues from
environmental damage and pathogens.
The epidermis produces hormones for skin health.
The epidermis regulates body temperature through sweat production.
6. If a patient has a deep cut that heals with a noticeable scar, what factors
might influence the appearance and texture of that scar?
Factors such as the depth of the injury, the individual's healing
process, and the location of the scar can influence its appearance
and texture.
The type of bandage used has no effect on the scar.
The color of the patient's skin is the only factor that influences scar
texture.
Only the age of the patient affects the scar's appearance.
7. Describe the significance of the nail matrix in nail growth and health.
The nail matrix protects the nail from infections.
The nail matrix is crucial for nail growth as it contains the cells that
produce new nail tissue.
The nail matrix is responsible for the color of the nail.
, The nail matrix helps in the sensation of touch.
8. Describe the composition of nails and explain why they are considered dead
cells.
Nails consist of melanin, which gives them color.
Nails are primarily made of collagen, which provides flexibility.
Nails are composed of keratin, a tough protein, and are considered
dead cells because they lack blood supply and nerve endings.
Nails are made of living cells that constantly divide and grow.
9. What substance are nails primarily made of?
Melanin
Keratin
Elastin
Collagen
10. What substance from the blood accumulates to form a clot?
White blood cells
Macrophages
Red blood cells
Platelets
11. What is the primary component of the hypodermis?
Nervous tissue
Adipose tissue
