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True or False. Aristotle did not believe that natural phenomena could have supernatural causes.
Which of the following is most similar to the negative feedback effect in human physiology?
A. a car that runs out of gas and stops
B. starting a bonfire with only a single match
C. a toilet tank that refills itself after a flush
D. a teacher marking all the wrong answers on a student's exam
E. an automatic door that opens when you approach it
Which of the following is most similar to the positive feedback effect in human physiology?
Which of the following correctly lists the levels of human structural complexity from the smallest to the largest structural units?
A. organelles, organisms, organs, organ systems
B. cells, organisms, organelles, organs, organ systems
C. organelles, cells, organs, tissues, organism
D. cells, organs, tissues, organisms, organ systems
E. organelles, cells, tissues, organs, organ systems
Which one of the following is NOT in the correct anatomical position?
A. arms at sides
B. standing erect
C. palms facing posterior
D. feet flat on the floor
E. face and eyes facing forward
All of the following processes allow for transport of materials across the cell membrane except
B. facilitated diffusion.
C. simple diffusion.
Which of the following organelles contains inner and outer membranes and plays an important role in energy production?
A. the nuclear envelope
B. the mitochondrion
C. the lysosome
D. the smooth endoplasmic reticulum
All of the following processes can move substances out of a cell except
C. active transport.
D. simple diffusion.
Which one of the following statements is an incorrect interpretation of the modern cell theory?
A. All organisms are composed of cells and cell products.
B. An organism's structure and all of its functions are due to the activities of cells.
C. The cellular organelles are the simplest structural and functional unit of life.
D. Cells come from preexisting cells.
Which one of the following organelles may seem to violate the cell theory's statement that the cell is the smallest structural and functional unit of life?
C. Golgi apparatus
E. endoplasmic reticulum
Which two of the following shapes are commonly found in epithelial tissues?
A. squamous and columnar
B. squamous and spheroid
C. stellate and columnar
D. stellate and spheroid
Which one of the following is not a gated channel formed by an integral protein?
A. ligand regulated gate
B. voltage regulated gate
C. hormone regulated gate
D. mechanically regulated gate
Bacterial DNA most resembles human DNA in which one of the below structures?
E. rough endoplasmic reticulum