16. Which type of tissue transmits electrical signals in the body?
a) Epithelial tissue
b) Nervous tissue
c) Connective tissue
d) Muscle tissue
Answer: b) Nervous tissue
17. Which type of connective tissue cushions and supports joints?
a) Ligaments
b) Tendons
c) Cartilage
d) Adipose tissue
Answer: c) Cartilage
18. Which type of muscle tissue is found in the heart?
a) Skeletal muscle
b) Smooth muscle
c) Cardiac muscle
d) Striated muscle
Answer: c) Cardiac muscle
19. Which layer of the skin contains blood vessels that help regulate body temperature?
a) Epidermis
b) Dermis
c) Hypodermis
d) Subcutaneous layer
Answer: b) Dermis
20. What is the pigment responsible for skin color?
a) Collagen
b) Keratin
c) Elastin
d) Melanin
Answer: d) Melanin