Place the following in correct sequence from simplest to most complex:
1. molecules
2. atoms
3. tissues
4. cells
5. organs
2-1-3-4-5
2-1-4-3-5
1-2-4-3-5
1-2-3-4-5
The Correct Answer is B
A. 2-1-3-4-5: This sequence incorrectly places tissues before cells, but tissues are composed of groups of similar cells, so cells must come first.
B. 2-1-4-3-5: Atoms combine to form molecules, molecules organize into cells, cells form tissues, and tissues assemble into organs. This sequence correctly progresses from the simplest to the most complex level of organization.
C. 1-2-4-3-5: Molecules do not precede atoms; atoms are the fundamental units that combine to form molecules. Starting with molecules makes the sequence inaccurate.
D. 1-2-3-4-5: Placing molecules before atoms and tissues before cells reverses the correct order of structural complexity in the body.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Osmosis: Osmosis specifically refers to the movement of water across a selectively permeable membrane, not gases like oxygen or carbon dioxide.
B. Secondary active transport: Secondary active transport uses energy indirectly from an ion gradient to move molecules against their concentration gradient. Oxygen and carbon dioxide move passively.
C. Simple diffusion: Oxygen and carbon dioxide are small, nonpolar molecules that can freely cross the lipid bilayer of the plasma membrane. They move down their concentration gradients without the need for energy or transport proteins.
D. Channel-mediated facilitated diffusion: This process requires specific protein channels to transport polar or charged molecules. Since oxygen and carbon dioxide are nonpolar, they do not require channels to diffuse across the membrane.
Correct Answer is C
Explanation
A. Nutrients, water, movement, and reproduction: Movement and reproduction are important functions, but they are not considered fundamental survival needs for maintaining life at the cellular and systemic level.
B. Nutrients, water, growth, and reproduction: Growth is a process that occurs when survival needs are met, but it is not a basic requirement for immediate survival, unlike oxygen or appropriate atmospheric pressure.
C. Nutrients, water, atmospheric pressure, and oxygen: These are essential survival needs. Nutrients and water provide energy and materials for cellular processes, oxygen is required for aerobic metabolism, and atmospheric pressure ensures proper gas exchange in the lungs.
D. Water, atmospheric pressure, growth, and movement: While water and atmospheric pressure are essential, growth and movement are not immediate survival needs and do not directly sustain life functions.
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