Variations in hair color arise from differing amounts of ________.
A. keratin and melanin
B. eumelanin and pheomelanin
C. carotene and hemoglobin
D. carotene and collagen
E. collagen and elastic filaments
Answer: B
Anatomy & Physiology
You might also like to view...
Which vessels play an important role in preventing edema?
a. arteries. b. arterioles. c. capillaries. d. veins. e. lymph vessels.
Anatomy & Physiology
The two vertebral arteries fuse to form a large artery, the
A) circle of Willis. B) common carotid artery. C) external carotid artery. D) internal carotid artery. E) basilar artery.
Anatomy & Physiology
Which skull bone articulates with the first vertebra?
a. temporal b. occipital c. sphenoid d. ethmoid
Anatomy & Physiology
Answer the following statement(s) true (T) or false (F)
a muscle described as having a direct attachment is attached to the bone via a tendon or aponeurosis.
Anatomy & Physiology