IB SEHS Topics 4.1-3 Review

A lever by itself is not effective. It must have something on which to pivot. This point is called:

• balance point

• falcon

• fulcrum

• balance arm

The image shows:

• 1st class lever

• 2nd class lever

• 3rd class lever

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Opening the door by a handle is an example of....

• 1st class lever

• 2nd class lever

• 3rd class lever

Biceps curl is an example of...

• 1st class lever

• 2nd class lever

• 3rd class lever

Tags

NGSS.MS-PS3-5

Functions of a lever include increasing the load (or force) and...

• increasing the acceleration with which an object will move

• increasing the velocity with which an object will move

• increasing the distance which an object will move

Contractile unit of a muscle which is also the functional unit of a muscle is ...

• sarcomere

• motor unit

• fascicle

• myofibril

The neurotransmitter stored in the axon terminal identified as #3

• Acetylcholine
• Protein Channel
• Calcium Ion (Ca²⁺)
• Syanptic Cleft

Region where a motor neuron comes in close contact with a muscle cell.

• neurotransmitter
• muscular dystrophy
• muscle tension
• neuromuscular junction

The organelle that contains actin and myosin.

• Tendon
• myofilament
• myofibril
• Fiber

Thin filaments in a myofibril are

• Sarcomeres
• Sarcoplasm
• Actin
• Myosin