Muscular System

Smooth Muscle is found in the?

• Heart

• Facial

• Organs

• Legs

given the following events:

1.acetycholine broken down

2.acetylcholine moves across the synaptic cleft

3.action potential reaches the terminal branch (presynaptic terminal)

4.acetylcholine combines with a receptor molecule on a skeletal muscle (postsynaptic membrane)

5.action potential produced in skeletal muscle cell

Choose the arrangement that lists the events in the order the occur at a neuromuscular injunction

• 2,3,4,1,5

• 3,2,4,5,1

• 3,4,2,1,3

• 4,5,2,1,3

Tags

NGSS.MS-LS1-2

Skeletal muscles are responsible for which of the following?

• Movement of the body
• Movement of the heart
• Movement of the ligaments 
• Movement of the extremities

Which of the following describes the sarcomere? 

• The basic unit of muscle’s cross-striated myofibril
• . A protein band which defines the boundary between one sarcomere 
•  Various muscle proteins 
• Contains the protein, actin

Which of the following describes muscle bundles? 

• Long, multi-nucleated, thread-like cells
• Set of muscle fibers grouped together 
• Considered to the cell of the muscle 
• Organelles which are unique to muscle tissue

Tags

NGSS.MS-LS1-3

Skeletal muscles are attached to which of the following? 

• Bones and ligaments 
• Ligaments and tendons
• Tendons and bones
• Bones and fat 

The nerve releases a chemical called a

• neurotransmitter

• neuron

• myofibril

• cell

Tags

NGSS.MS-LS1-8

What are the two classifications of muscles in your body?

• Voluntary and Controllable
• Flabby and Strong
• Involuntary and Voluntary
• Hard and soft

How do pairs of skeletal muscles work together?

• while one contracts, the other returns to original length
• both muscles contract at the same time
• both muscles relax at the same time
• 1 muscle pulls on the bone and the other pulls on the first muscle

Which 2 systems work together to help a person stand erect?

• skeletal / muscular
• skeletal / digetive
• skeletal / respiratory
• skeletal / cardiovascular

Tags

NGSS.HS-LS1-2