Anatomy chapt 1&2

The basic building block of a protein molecule is a(n

• R group.

• nitrogen atom.

• amino acid.

• carboxyl group.

Why do atoms lose, gain, or share electrons?

• To increase bonding

• To form compounds

• To obtain stability

• To release energy

Why are some amino acids called essential?

• They must be obtained from outside sources through diet.

• The body must manufacture them itself.

• they are essential for making bones and teeth.

• They make enzymes essential for the breakdown of food.

The human body is organized in a hierarchy, from the very ____________________ to the very ____________________.

• deep; superficial

• complex; simple

• simple; complex

• superficial; deep

Which of the following correctly describes the anatomical position?

• Standing erect with arms overhead, face and feet facing forward

• Standing erect, facing forward, with arms outstretched

• Standing erect with arms at sides, palms facing backward, face and feet facing forward

• Standing erect with arms at sides and with palms, face, and feet facing forward

The heart is located in the mediastinum, which is part of what cavity?

• Thoracic cavity

• Cranial cavity

• Spinal cavity

• Dorsal cavity

The body often relies this process in order to achieve or maintain a state of homeostasis:

• positive feedback.

• situs inversus.

• negative feedback

• respiration.

Transfer of electrons from an atom of one element to an atom of another element results in

• one unstable atom and one stable atom.

• a covalent bon

• an ionic bond

• a hydrogen bond

This group of organic compounds is very large and diverse; however, they are all characterized by their insolubility in water.

• Proteins

• Nucleic Acids

• Lipids

• Carbohydrates

How do cells obtain energy?

• Energy stored as fat is released into the blood.

• Cells break down protein molecules.

• Energy is released by breaking bonds in ATP molecules

• Energy is made in the liver and released into the blood for the cells to use.