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The levels of organization from most simple to most complex are?
When using directional terms to describe the body, it is assumed that the body is in what position?
The part of a feedback loop that has the direct effect on the regulated condition is called?
The part of the feedback loop that compares the present condition to the homeostatic condition the body is trying to maintain is called?
the control center
When your body temperature drops below normal, your muscles begin to contract rapidly, making you shiver and generating heat. In this case your muscles are acting as the?
Which of the following body functions is an example of a positive feedback loop?
both b and c (forming a blood clot, ulterine contractions during labor)
Which describes the anatomical relationship of the wrist to the elbow?
The elbow is proximal to the wrist
Electrons are found?
both b and c (in orbitals, at various distances from the nucleus called energy levels
An atom that contains 20 protons, 21 nuetrons, and 20 electons has?
no charge (electrically neutral)
Which of these elements is not one of the four elements that make up most of the human body?
Which are small fingerlike projections on the plasma membrane that increases the cell's ability to absorb substances?
Which structure has ribosomes attached to it and helps transport proteins throughout the cell?
rough endoplasmic reticulum
Which organelle consists of tiny flattened sacs that help process and package chemicals in the cell?
What is the process by which substances scatter themselves evenly throughout an available space?
What is the movement of water from an area of higher concentration through a selectively permeable membrane?
What is the movement of water and solutes through a membrane because of hydrostatic pressure?
Because of specific base pairing, if one side of the DNA molecule has the nucleotide sequence of adenine - guanine - adenine - cytosine - thymine, the other side would be
thymine- cytosine - thymine - guanine- adenine
If the DNA code is adenine- thymine- guanine, the messanger RNA sequence would be
thymine- uracil- cytosine
If the messenger RNA code is adenine- uracil- cytosine, the transfer RNA bringing the amino acid would have which code?
uracil- adenine- guanine
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