Biology 168 Test 1 Questions and Answers Graded A+
Levels of Organization - Answers Cell
tissue
organ
organ system
organism
Homeostasis - Answers ability to maintain internal stability
Positive feedback - Answers output enhances the original stimulus
ex. childbirth: oxytocin released w/ contractions. Ends oxytocin and positive feedback when baby is
born.
Negative Feedback - Answers Output reduces original effect of the stimulus
ex. thermostat set at 70. Heat turning on/off to maintain 70 degrees.
Frontal Plane - Answers
Transverse Plane - Answers
Sagittal Plane - Answers
Superior Plane - Answers head is superior to toes (above)
Inferior Plane - Answers toes are inferior to head (below)
Posterior Plane - Answers behind/bottom
Anterior Plane - Answers infront/ontop
Lateral Plane - Answers further from midline of the body
Medial Plane - Answers closer to midline of the body
Proximal Plane - Answers closest to point of reference
Distal Plane - Answers furthest from point of reference
, Plasma Membrane definition - Answers selectively permeable to ions and organic molecules. Controls
movement of substances in and out of cells.
Plasma Membrane function - Answers To protect a cell from the surroundings.
Why is Plasma Membrane Important? - Answers Without it, bad toxins and other chemicals/viruses
could get into cells easier.
What is the Plasma Membrane made up of? - Answers 2 layers of phospholipids, cholesterol, glycolipids,
and proteins
Passive Transport Definition - Answers Moving through the cell membrane with out input of energy
When would cells use Passive Transport? - Answers diffusion of a cell across a membrane
Active Transport Definition - Answers Materials move against concentration gradient and energy is used.
When would cells use Active Transport? - Answers If cells need to go up concentration gradient
Extracellular Matrix - Answers meshwork of proteins and carbs that binds cells or divide tissues made of
insoluble and soluble fibers.
Interstitial Fluid - Answers Fluid that surrounds the body's cells
Extracellular Matrix is produced by? - Answers fibroblasts, osteoblasts, chondrocytes
Proteins are made of ____ acids - Answers amino
Protein Functions - Answers Cause movement, serve as catalyst, and contribute to structural support
Triglycerides functions - Answers long-term energy storage, structural support, insulation of the body
RNA - Answers ribonucleic acid, found in the cell's nucleus and cytoplasm, single stranded
Polymer examples - Answers protein, carbs, nucleic acid
Nucleic Acid - Answers Ex.- RNA & DNA
Store genetic information
ATP contains what nitrogenous base - Answers adenine
DNA - Answers Double stranded, found in chromosomes, contains nitrogenous bases
Polar amino acids - Answers Glutamine and Threonine
Components of nucleotide monomer - Answers nitrogenous base and a phosphate group
Levels of Organization - Answers Cell
tissue
organ
organ system
organism
Homeostasis - Answers ability to maintain internal stability
Positive feedback - Answers output enhances the original stimulus
ex. childbirth: oxytocin released w/ contractions. Ends oxytocin and positive feedback when baby is
born.
Negative Feedback - Answers Output reduces original effect of the stimulus
ex. thermostat set at 70. Heat turning on/off to maintain 70 degrees.
Frontal Plane - Answers
Transverse Plane - Answers
Sagittal Plane - Answers
Superior Plane - Answers head is superior to toes (above)
Inferior Plane - Answers toes are inferior to head (below)
Posterior Plane - Answers behind/bottom
Anterior Plane - Answers infront/ontop
Lateral Plane - Answers further from midline of the body
Medial Plane - Answers closer to midline of the body
Proximal Plane - Answers closest to point of reference
Distal Plane - Answers furthest from point of reference
, Plasma Membrane definition - Answers selectively permeable to ions and organic molecules. Controls
movement of substances in and out of cells.
Plasma Membrane function - Answers To protect a cell from the surroundings.
Why is Plasma Membrane Important? - Answers Without it, bad toxins and other chemicals/viruses
could get into cells easier.
What is the Plasma Membrane made up of? - Answers 2 layers of phospholipids, cholesterol, glycolipids,
and proteins
Passive Transport Definition - Answers Moving through the cell membrane with out input of energy
When would cells use Passive Transport? - Answers diffusion of a cell across a membrane
Active Transport Definition - Answers Materials move against concentration gradient and energy is used.
When would cells use Active Transport? - Answers If cells need to go up concentration gradient
Extracellular Matrix - Answers meshwork of proteins and carbs that binds cells or divide tissues made of
insoluble and soluble fibers.
Interstitial Fluid - Answers Fluid that surrounds the body's cells
Extracellular Matrix is produced by? - Answers fibroblasts, osteoblasts, chondrocytes
Proteins are made of ____ acids - Answers amino
Protein Functions - Answers Cause movement, serve as catalyst, and contribute to structural support
Triglycerides functions - Answers long-term energy storage, structural support, insulation of the body
RNA - Answers ribonucleic acid, found in the cell's nucleus and cytoplasm, single stranded
Polymer examples - Answers protein, carbs, nucleic acid
Nucleic Acid - Answers Ex.- RNA & DNA
Store genetic information
ATP contains what nitrogenous base - Answers adenine
DNA - Answers Double stranded, found in chromosomes, contains nitrogenous bases
Polar amino acids - Answers Glutamine and Threonine
Components of nucleotide monomer - Answers nitrogenous base and a phosphate group
