Learnbeat BS. D - Muscles SRN

• Biologie
• Middelbare school
• havo
• Leerjaar 1

Movement 

D - Muscles

Planning 

- Recap BS. A, B and C

- BS D - Muscles

- Assignments

- Test: Tuesday 4 feb

How do we call joints that allow for a lot of movement?

1. Synovial joints
2. Fibrous joints
3. Cartilaginous joints
4. Sutures

How do we call the joints that keep the bones of the skull together?

1. Synovial joints
2. Fibrous joints
3. Cartilaginous joints
4. Sutures

What type of joints are the intervertebral discs?

1. Synovial joints
2. Fibrous joints
3. Cartilaginous joints
4. Sutures

New born babies have fontanelles in their skull. Later, the bones will grow together and form sutures. Why did the bones not yet grow together?

What type of joints are the pivot, hinge and ball-and-socket joint?

1. Synovial joints
2. Fibrous joints
3. Cartilaginous joints
4. Sutures

Look at the X-ray of a synovial joint. What is the name of this type of joint?

1. Pivot joint
2. Hinge joint
3. Ball-and-socket joint
4. Knee joint

PIVOT 

HINGE

BALL-AND-SOCKET

Next to bones and joints, what else do you need for movement?

Skelly the Skeleton -

A day at the Beach

• Which type of joint did Skelly use to move his arms and legs when putting on his swimsuit?
• Which joint allowed Skelly to turn his head to look in the mirror?
• Which joints helped Skelly run and jump while playing volleyball?
• Which joints did Skelly use in his wrists to give the volleyball extra power?
• What type of bone connection helped Skelly keep his head steady while building a sandcastle?

D - Muscles

Muscles

Muscles let you stand up straight and move about. 

All the skeletal muscles in your body combined form the muscular system

Muscles

There are three types:

1. voluntary skeletal muscles (you decide to move)

2. involuntary organ muscles (you can't control it)

3. cardiac muscle (in your heart)

Tendons

The muscle is attached to the bone by tendons (pezen). 

Muscles are able to contract, but tendons are not. 

Bones move because of the muscle contractions.

Antagonistic pair

To move a bone, you always need two muscles: a flexor muscle and an extensor muscle. These two muscles have opposite effects.

= antagonistic pair

Involuntary organ muscles

In addition to the skeletal muscles, you also have muscles in your organs. These organ muscles move without you being aware of it.

For example:

-muscles in your oesophagus, stomach, intestines

- your heart has a special muscle tissue, one that never tires. 

Learnbeat 

BS D - Muscles 

Read the theory 

Make the assignments 

The muscles in your small intestines are ...

1. voluntary muscles
2. involuntary muscles

Skeletal muscles are voluntary muscles

1. true
2. false

The muscles in your tongue are ...

1. voluntary muscles
2. involuntary muscles

Marathon runners have a lot of ... in their muscles

1. fast-twitch fibres
2. slow-twitch fibers

What is a antagonistic pair?

1. a place where two bones meet
2. muscles that work together
3. Tendons and ligaments