The Human Body

What is the hardest tissue in the human body?

• Outer layer of Patella (Kneecap)

• Tooth Enamel

• 
• Fingernail

Answer explanation

Tooth enamel is mostly hydroxyapatite, which is a mineral form of calcium phosphate. The apatite group of minerals scores a five on the Mohs hardness scale; which makes enamel the hardest biological material. Tooth enamel is harder than gold, silver, iron, or steel, but a lot more brittle.

Which of these are Carbon compounds that exist inside the human body.

• Nucleic Acids (DNA, RNA)

• Proteins (Brain, muscles, hormones, antibodies are made of proteins)

• Fats (Outer barrier of cells, layer beneath the skin)

• Water

Pick the 3 chemical elements that make up more than 93% of the human body

• Oxygen

• Carbon

• Calcium

• Hydrogen

A nucleotide is the basic building block of nucleic acids (RNA and DNA). A nucleotide consists of a sugar molecule attached to a phosphate group and a nitrogen-containing base. Which of these is NOT a nitrogenous base which makes up DNA?

• Adenine

• Deoxyribose

• Cytosine

• Guanine

Answer explanation

Deoxyribose is the sugar molecule in a nucleotide that makes up DNA.

The 4 nitrogenous bases in the nucleotide are Adenine, Thymine, Cytosine and Guanine.

Only a few body cells last a lifetime (> 80 years). Which of these do not?

• Neurons in the Visual Cortex

• Skeletal muscle cells

• Eye Lens cells

• Heart muscle cells

You have a completely new skeleton once every _ years.

• 77

• 7

• 20

• 35

Answer explanation

The collagen in bone constantly renews itself.

I run down the front of your body, supporting the ribs. Who am I?

• Femur

• Spinal column

• Cranium

• Sternum

Which muscle in the human body can exert the most force?

• Heart

• Soleus (Calf)

• Masseter (Jaw)

• Biceps

Which muscle in the human body can exert the most pressure?

• Heart

• Soleus (Calf)

• Masseter (Jaw)

• Bicep

We make up 30 - 50 % of your total body weight.

Our mass typically begins to decline after you age beyond 40.

We are the only muscles that can be consciously controlled.

Who are we?

• Skeletal muscles

• Cardiac muscles

• Stomach lining muscles