GED Science : Muscular and Skeletal Systems

Study concepts, example questions & explanations for GED Science

varsity tutors app store varsity tutors android store

Example Questions

Example Question #1 : Muscular And Skeletal Systems

What structure is responsible for connecting a muscle to a bone?

Possible Answers:

Skin

Ligament

Tendon

Joint

Correct answer:

Tendon

Explanation:

Muscles do not attach directly to bones. Instead, a tendon is used to attach the two structures. Ligaments connect a bone to another bone, while joints are the locations where bones move around one another.

Example Question #2 : Muscular And Skeletal Systems

Which type of muscle is under voluntary control?

Possible Answers:

Skeletal muscle

All muscle is under conscious control

Cardiac muscle

Smooth muscle

Correct answer:

Skeletal muscle

Explanation:

There are three types of muscle in the body: skeletal, cardiac, and smooth muscle. Of the three, skeletal muscle is the only one that can be consciously controlled. Cardiac and smooth muscle are controlled involuntarily.

An example of skeletal muscle is your biceps brachii muscle; you can voluntarily control this muscle to flex your arm. An example of smooth muscle is the muscle surrounding your arteries; you cannot voluntarily contract this muscle to constrict your arteries. Cardiac muscle is found in the heart; you cannot voluntarily choose to slow your heart rate.

Example Question #3 : Muscular And Skeletal Systems

What is one function of bone marrow?

Possible Answers:

Calcium production

Blood filtration

Red blood cell development

Glycogen storage

Correct answer:

Red blood cell development

Explanation:

Red bone marrow is found in the ends (epiphyses) of long bones such as the femur and is responsible for red blood cell development. Yellow bone marrow is found in the center (diaphysis) of long bones and can store fat for energy.

Blood filtration primarily occurs in the spleen or kidney. Glycogen is primarily stored in the liver. Calcium is released from the mineral matrix of the bone, but is not actually found in the bone marrow.

 

Example Question #4 : Muscular And Skeletal Systems

How does cardiac muscle differ from skeletal muscle?

Possible Answers:

Only skeletal muscle is striated

Only cardiac muscle can contract

Only skeletal muscle has sarcomeres

Only skeletal muscle cells have multiple nuclei

Correct answer:

Only skeletal muscle cells have multiple nuclei

Explanation:

Skeletal and cardiac muscle have quite a bit in common: both are examples of striated muscle that use the sarcomere as the basic functional unit. Sarcomeres are small units that are capable of contracting. When these units line up in a cell, they create a striped appearance known as "striated" or "striations." Both skeletal and cardiac muscle are capable of contracting; this is a key characteristic of any muscle cell.

A primary difference between skeletal and cardiac muscle cells is the number of nuclei each cell possesses. Skeletal muscle cells usually have several nuclei, but cardiac muscle cells usually have only one nucleus per cell.

Learning Tools by Varsity Tutors

Incompatible Browser

Please upgrade or download one of the following browsers to use Instant Tutoring: