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which organ provides support, protection of soft tissue, mineral storage and blood formation?
When body temperature rises, a center in the brain initiates physiological changes to decrease the body temperature. This is an example of ___
The integrating center for the negative feedback loop that regulates body temperature is the ___
A cell or organ that responds to commands of the control center in negative feedback is termed an
A person facing forward with hands at the sides and palms facing forward is in the ______ position.
While standing in the anatomical position, ____.
front refers to anterior and ventral. back refers to posterior and dorsal
The muscle known as the diaphragm separates the ____ from the ____.
thoracic cavity abdominopelvic cavity
Which has a greater concentration of hydrogen ions, a substance with a pH of 5 or a substance with a pH of 4?
a pH of 4
The group of organic compounds containing carbon, hydrogen and oxygen in a near 1:2:1 ratio is defined as a ___.
form essential structural components of the cells, provide roughly twice the energy as carbohydrates, help to maintain body temperature, and cushion organs against shock
A lipid made of a glycerol molecule with two fatty acids attached to one side and a phosphate group connecting a nonlipid group attached to the other is a ___.
Interaction between individual polypeptide chains to form a protein complex is ____ structure.
According to the rules of complementary base pairing in nucleic acids, cytosine would pair with the base ____.
with myosin, produce cell movement
anchor the cytoskeleton to membrane proteins and control the consistency of cytoplasm
Microtubules have these functions: ___.
they form structural components of organelles, move chromosomes during cell division, provide a mechanism for moving organelles and provide strength
___ consists of a network of intracellular membranes with attached ribosomes.
rough endoplasmic reticulum
Some cells contain large numbers of mitochondria while others have relatively few to none. This suggests that ___.
cells with large numbers of mitochondria have a high energy demand
The functional units of DNA that contain the instructions for making one or more proteins are ___.
The movement of oxygen from an area of high concentration to an area of low concentration is an example of ___.
A solution that contains a lower osmotic pressure than the cytoplasm of a cell is called __.
Facilitated diffusion differs from ordinary diffusion in that ___.
the rate of molecular movement is limited by the number of available carrier molecules
Assume that the transport of a particular amino acid across the plasma membrane is observed (1) to occur only down its concentration gradient and (2) to slow when a similar amino acid is added to the extracellular fluid. The movement of the amino acid through the membrane is most likely by ___.
The stage in a cell's life cycle in which the cell performs its normal functions and prepares for division is called ___.
During this phase of cell division, the chromosomes uncoil, the nuclear membrane forms, and cytokinesis occurs.
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