Describe the bands that create the light and dark areas of skeletal muscle fibers known as striations
What will be an ideal response?
I bands and A bands create the light and dark areas known as striations on a skeletal muscle fiber. I bands, or light bands, contain only thin filaments. These bands are lighter because they allow more light to pass through. A bands, or dark bands, contain thick filaments. The thick filaments block more light than the thin filaments.
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Which protist is best described by its lifestyle?
A) Euglena have features of animals and fungi. B) Paramecium are ciliated hunters. C) Plasmodium are free-living animal-like protists. D) Amoebas are sedentary photosynthetic protists.
Which is an active transport process?
A. Simple diffusion B. Bulk filtration C. Osmosis D. Facilitated diffusion E. Ion pump
The primary factor responsible for forward propulsion of chyme through the small intestine is mass movements
Indicate whether the statement is true or false
Which statement about desmosomes is NOT true?
a. They hold cells together under high mechanical stress. b. They are located in intercalated discs. c. They are found in vertebrate hearts. d. They conduct electrical impulses between cardiac cells. e. all of these are true.