Unit 2 (Final Review)

Which bone tissue stores blood stem cells?

• yellow bone marrow

• red bone marrow

• periosteum

• endosteum

_____ neurons send commands from the CNS to skeletal muscles

Color/circle the brain region that is responsible for balance and motor skills.

Which fiber type would you expect to be dominant in a muscle used for posture/stabilization?

• Slow twitch

• Fast twitch

• Intermediate

• None (the fibers will be in roughly equal proportions).

The ________ nervous system is responsible for the fight or flight response.

Briefly explain an action potential.

Which of the following about compact and spongy bone is true? Select all that apply.

• most bone is made of both spongy bone and compact bone, with compact bone located more externally

• spongy bone is created when osteoclasts break down small cavities in compact bone, leaving behind a network of tiny bone branches

• spongy bone is lighter than compact bone b/c it has a different chemical make-up from compact bone

• compact bone is composed of units called osteons and spongy bone is composed of units called trabeculae

• compact bone forms via endochondral ossification and spongy bone forms via intramembranous ossification

Which of the following receptors is found in the eye and responsible for vision?

• Thermoreceptors

• Mechanoreceptors

• Chemoreceptors

• Nociceptors

• Photoreceptors

Which of the following is true about myelination?

• It creates a barrier around the entire axon.

• It slows down action potential conduction by decreasing external resistance.

• It acts as insulation to prevent signal leakage from the neuron and speed up conduction.

• It is formed by simple squamous epithelial cells.

Which of the following are functions of the muscular system? Select all that apply.

• Creation of red blood cells

• Thermoregulation

• Movement, protection, & support

• Glycogen storage

• Mineral storage