Science

Question 1

What is diffusion?

Answer 1

Diffusion is the movement of particles from an area of high concentration to an area of low concentration.

Question 2

True or False: Diffusion requires energy.

Answer 2

False

Question 3

Fill in the blank: Diffusion is driven by the ________ gradient.

Answer 3

concentration

Question 4

What is the function of the skeleton?

Answer 4

The skeleton provides support, protection, and structure for the body.

Question 5

How many bones are in the human body?

Answer 5

There are 206 bones in the adult human body.

Question 6

True or False: Bones are living tissue.

Answer 6

True

Question 7

Fill in the blank: The outer layer of bone is called the ________.

Answer 7

periosteum

Question 8

What are muscles made of?

Answer 8

Muscles are made of muscle fibers that contract and relax to produce movement.

Question 9

How many muscles are in the human body?

Answer 9

There are over 600 muscles in the human body.

Question 10

True or False: Muscles can only pull, not push.

Answer 10

True

Question 11

Fill in the blank: The point at which a muscle attaches to a bone is called the ________.

Answer 11

tendon

Question 12

What is the largest bone in the human body?

Answer 12

The femur (thigh bone) is the largest bone in the human body.

Question 13

True or False: Muscles work in pairs to produce movement.

Answer 13

True

Question 14

Fill in the blank: The process by which muscles contract and relax to produce movement is called ________.

Answer 14

muscle contraction

Question 15

What is the main function of red bone marrow?

Answer 15

Red bone marrow produces red blood cells, white blood cells, and platelets.

Question 16

True or False: Muscles are responsible for maintaining posture.

Answer 16

True

Question 17

Fill in the blank: The smallest unit of muscle contraction is the ________.

Answer 17

sarcomere

Question 18

What is the purpose of synovial fluid in joints?

Answer 18

Synovial fluid lubricates joints and reduces friction during movement.

Question 19

True or False: The human body has both voluntary and involuntary muscles.

Answer 19

True

Question 20

Fill in the blank: The main function of the skeletal system is to provide ________ for the body.

Answer 20

support

Question 21

Which muscle is responsible for pumping blood throughout the body?

Answer 21

The heart muscle (cardiac muscle) is responsible for pumping blood throughout the body.

Question 22

Fill in the blank: The tough, fibrous tissue that connects muscles to bones is called a ________.

Answer 22

tendon

Question 23

What is the purpose of the rib cage in the skeletal system?

Answer 23

The rib cage protects the vital organs in the chest, such as the heart and lungs.

Question 24

True or False: Muscles can only contract, not elongate.

Answer 24

False