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Fatima > Science > Flashcards

Science Flashcards

1
Q

What is diffusion?

A

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

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2
Q

True or False: Diffusion requires energy.

A

False

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3
Q

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

A

concentration

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4
Q

What is the function of the skeleton?

A

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

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5
Q

How many bones are in the human body?

A

There are 206 bones in the adult human body.

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6
Q

True or False: Bones are living tissue.

A

True

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7
Q

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

A

periosteum

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8
Q

What are muscles made of?

A

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

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9
Q

How many muscles are in the human body?

A

There are over 600 muscles in the human body.

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10
Q

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

A

True

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11
Q

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

A

tendon

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12
Q

What is the largest bone in the human body?

A

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

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13
Q

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

A

True

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14
Q

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

A

muscle contraction

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15
Q

What is the main function of red bone marrow?

A

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

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16
Q

True or False: Muscles are responsible for maintaining posture.

A

True

17
Q

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

A

sarcomere

18
Q

What is the purpose of synovial fluid in joints?

A

Synovial fluid lubricates joints and reduces friction during movement.

19
Q

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

A

True

20
Q

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

A

support

21
Q

Which muscle is responsible for pumping blood throughout the body?

A

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

22
Q

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

A

tendon

23
Q

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

A

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

24
Q

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

A

False

Fatima (5 decks)

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