Chapter 15: Support, Movement, and Responses - Science

The Skin
1. The epidermis produces melanin. Cells at
the base of the epidermis produce new skin
cells. The dermis contains nerves, sweat and
oil glands, and blood vessels.
2. The skin protects the body, reduces water
loss, produces vitamin D, and helps to
maintain body temperature.
3. Severe skin damage can lead to infection
and death if left untreated.
The Muscular System
1. Skeletal muscle is voluntary and moves
bones. Smooth muscle is involuntary and
controls movement of internal organs.
Cardiac muscle is involuntary and located
only in the heart.
2. Muscles only can contract. When one skeletal
muscle contracts, the other relaxes.
Copy and complete the following concept map on body movement.
are held in
place by
Ligaments
is made possible by
The Skeletal System
1. Bones are living structures that protect,
support, make blood, store minerals, and
provide for muscle attachment.
2. Joints are either immovable or moveable.
The Nervous System
1. The nervous system responds to stimuli to
maintain homeostasis.
2. A neuron is the basic unit of structure and
function of the nervous system.
3. A reflex is an automatic response.
4. The central nervous system is the brain and
spinal cord. The peripheral nervous system
includes cranial and spinal nerves.
5. Your senses enable you to react to your
environment.
6. Many drugs affect your nervous system.
Body Movement
is made possible by
Muscles
meet at are classified as
green.msscience.com/interactive_tutor
Voluntary
CHAPTER STUDY GUIDE 461