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