Unit 5 notes

What does "uni" mean in the term unicellular?

• Many

• One

• Few

• All

Answer explanation

In the term 'unicellular', 'uni' means 'one'. This indicates that unicellular organisms consist of a single cell, distinguishing them from multicellular organisms, which are made up of many cells.

In multicellular organisms, what do individual cells do?

• Perform all life functions independently

• Perform specific functions and work together

• Do not depend on each other

• Function as a single unit

Answer explanation

In multicellular organisms, individual cells perform specific functions and collaborate to maintain the organism's overall health and efficiency, rather than functioning independently or as a single unit.

What is the correct order of levels of organization in multicellular organisms?

• Organ, tissue, cell, organ system

• Cell, organ, tissue, organ system

• Cell, tissue, organ, organ system

• Tissue, cell, organ system, organ

Answer explanation

The correct order of levels of organization in multicellular organisms is: cell, tissue, organ, organ system. This sequence reflects how cells group to form tissues, which then combine to create organs, and finally, organ systems.

Are living organisms made of one type of cell?

• Yes, all organisms have only one type of cell

• No, some organisms have multiple types of cells

• Yes, but only in unicellular organisms

• No, all organisms have the same type of cell

Answer explanation

No, some organisms have multiple types of cells. Multicellular organisms, like humans and plants, consist of various specialized cells that perform different functions, unlike unicellular organisms that are made of a single cell type.

What is the function of fat cells?

• Store energy in the form of fat molecules

• Create a solid barrier

• Carry blood to every cell

• Produce oxygen

Answer explanation

Fat cells, or adipocytes, primarily function to store energy in the form of fat molecules. This stored energy can be utilized by the body when needed, making this choice the correct answer.

Which grocery store analogy is used for fat cells?

• Battery section

• Locked doors

• Aisles

• Produce section

Answer explanation

The analogy of fat cells as a 'battery section' highlights how fat cells store energy, similar to how batteries store power. This contrasts with other options that do not accurately represent the function of fat cells.

What is the observation for skin cells?

• Round cells that are closely compacted

• Sac-like structure

• Flat disk shape

• Star-shaped

Answer explanation

Skin cells are typically observed as round cells that are closely compacted together, forming a protective layer. This structure is essential for maintaining the integrity and function of the skin.

What function do skin cells perform?

• Create a solid barrier that protects you

• Store energy

• Carry blood to every cell

• Produce hormones

Answer explanation

Skin cells create a solid barrier that protects the body from external threats, such as pathogens and physical damage. This protective function is essential for maintaining overall health.

What is the grocery store analogy for blood cells?

• Aisles

• Battery section

• Locked doors

• Checkout counter

Answer explanation

In the grocery store analogy, blood cells are compared to aisles because they travel through the bloodstream, similar to how shoppers move through aisles to find what they need. This highlights their role in transporting substances.

What is the primary function of blood tissue?

• Supports the weight of the body

• Circulates from the heart to the lungs and heart to the body

• Sends messages to the brain

• Breaks down food molecules

Answer explanation

The primary function of blood tissue is to circulate from the heart to the lungs for oxygenation and then from the heart to the body to deliver oxygen and nutrients, making the correct answer essential for bodily function.