Bones & Muscles

Question 1

Name the 2 divisions of the skeleton.

Answer 1

Axial and Appenducular

Question 2

What is red marrow composed of?

Answer 2

Blood Cells: RBCs, WBCs & Platelets

Question 3

These are the 2 types of protein fibers found in muscles.

Answer 3

Actin & Myosin

Question 4

Name 5 functions of bone.

Answer 4

Store Minerals
Form Blood Cells
Protection of Organs
Support & Framework of Body
Assist in Movement

Question 5

This is the name of the very dense, non-porous type of bone.

Answer 5

Compact

Question 6

The skull, vertebrae & rib cage all belong to this skeleton.

Answer 6

Axial

Question 7

These muscle filaments are very thin & are important to muscle contraction.

Answer 7

Actin

Question 8

What is ossification?

Answer 8

The hardening of bone.

Question 9

List 2 general types of joints.

Answer 9

Immovable & Movable

Question 10

These connect muscles to bone.

Answer 10

Tendons

Question 11

Name 2 types of movable joints.

Answer 11

Freely & Slightly movable

Question 12

These thick fibers contain cross-bridges & are important in muscle contraction.

Answer 12

Myosin

Question 13

This is the thin covering surrounding compact bone.

Answer 13

Periosteum

Question 14

These are the “tunnels” running through compact bone.

Answer 14

Haversian Canals

Question 15

When does ossification begin & end?

Answer 15

Begins as an embryo & ends in late teens - early twenties.

Question 16

True or False: Spongy bone is squishy.

Answer 16

False: it is porous, but solid.

Question 17

Name 3 types of muscles.

Answer 17

Smooth, Cardiac, & Skeletal

Question 18

These connect bone to bone.

Answer 18

Ligaments

Question 19

This type of muscle is striated with multiple nuclei per cell. It is attached to bone.

Answer 19

Skeletal

Question 20

This is the name of the neurotransmitter released by neurons that begins the process of contraction.

Answer 20

Acetylcholine

Question 21

This type of muscle has no striations.

Answer 21

Smooth

Question 22

This type of muscle is only found in the heart.

Answer 22

Cardiac

Question 23

This is what muscles release in response to acetylcholine.

Answer 23

Calcium ions

Question 24

This type of muscle is found in organs like the stomach, eyes, blood vessels, and digestive tract.

Answer 24

Smooth

Question 25

The humerus, femur and pelvis all belong to this skeleton.

Answer 25

Appendicular

Question 26

During contraction, cross-bridges do this.

Answer 26

Bend, pulling actin & myosin together.

Question 27

The type of joint found in your shoulder & hip.

Answer 27

Ball & Socket

Question 28

During relaxation, neurons release this.

Answer 28

Acetylcholinesterase

Question 29

Name 4 steps of muscle contraction.

Answer 29

1. Brain sends motor impulse 2. Neuron releases acetylcholine. 3. Muscles release Ca++ ions. 4. Cross-bridges bend, pulling actin & myosin together.q

Question 30

Name 4 steps of muscle relaxation.

Answer 30

1. Brain releases motor impulse. 2. Neuron releases acetylcholinesterase. 3. Ca++ ions are reabsorbed. 4. Cross-bridges straighten, and actin & myosin slide AWAY from each other.