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BIOS 251 EXAM 1 WSU|QUESTIONS AND 100% CORRECT WELL DETAILED ANSWERS|LATEST 2025/2026|GRADED A+|VERIFIED

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BIOS 251 EXAM 1 WSU|QUESTIONS AND 100% CORRECT WELL DETAILED ANSWERS|LATEST 2025/2026|GRADED A+|VERIFIED

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AND 100% CORRECT WELL DETAILED
ANSWERS|LATEST 2025/2026|GRADED


Organs of the body are defined as - ANSWER a combination of two or more tissues
that make up a structure which performs a specific function



What contains most of the water found in the human body? - ANSWER intracellular
fluid



What type of ductless gland secretes hormones into the bloodstream? -
ANSWER endocrine



smallest unit of life - ANSWER cells



Which tissue conducts signals primarily via electrical impulses? - ANSWER nervous
tissue



Which ion has a greater concentration inside the cell than outside? -
ANSWER potassium, K+



What organelle synthesizes most of the ATP used by cells? - ANSWER mitochondria



the biggest component of the plasma membrane, generally consists of two hydrophobic
fatty acid "tails" and a hydrophilic "head" consisting of a phosphate group -
ANSWER phospholipid




1

, Process of maintaining the interval environment in a state compatible for life -
ANSWER homeostasis



How many cells are in the human body? - ANSWER 100 trillion



what are the 4 types of primary tissue? - ANSWER epithelial, muscle, nerve,
connective



What detects change in a regulated variable in negative feedback? - ANSWER sensors



Where do sensors send information to? - ANSWER the integrating center



Where do the integrating center relay messages to? - ANSWER the effector



What type of membrane protein spans the membrane, allowing part of it to face the cytosol
and another part to face the extracellular fluid? - ANSWER the transmembrane
protein



What transport mechanism is passive? - ANSWER movement of sodium through ion
channels



What gradient determines the movement of ions across the membrane? -
ANSWER electrochemical gradient



What is primary active transport - ANSWER the process in which energy (ATP) is
directly used to move against a concentration gradient.



What is an example of primary active transport? - ANSWER Na+/K+ pump (sodium
potassium pump)



2

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