21.3 Vocabulary

What is the function of motor neurons?

• Control muscle movement

• Produce hormones

• Digest food

• Regulate body temperature

Which type of muscle makes up the thick middle layer of the heart?

• Smooth muscle

• Striated muscle

• Cardiac muscle

• Skeletal muscle

What is the role of the endocrine system?

• Produce energy

• Regulate blood flow

• Release hormones into the blood

• Control muscle movement

What is the function of the dermis?

• Form the inner layer of the skin

• Regulate body temperature

• Produce sweat

• Protect internal organs

What is the basic contractile unit of muscle fiber?

• Sarcomere

• Stimulus

• Axon

• Actin

What is the function of sensory neurons?

• Regulate body temperature

• Produce hormones

• Control muscle movement

• Activate by sensory input

What is the role of ultraviolet radiation?

• Emit non-ionizing radiation

• Regulate blood flow

• Aid in digestion

• Form the outer boundary of a living cell

What is the function of minerals in nutrition?

• Regulate body temperature

• Essential to nutrition

• Produce hormones

• Control muscle movement

What is the structure that forms the outer boundary of a living cell?

• Sarcomere

• Membrane

• Axon

• Actin

What is the function of smooth muscles?

• Involuntary muscle movement

• Produce hormones

• Control muscle movement

• Regulate blood flow