Which of the following would be in abundance in the intestines where you need to increase surface area for absorption?

flagella

cilia

microvilli

spindle fibers

Answer and Explanation

The Correct Answer is C

A. flagella: Flagella are for cell movement (e.g., sperm), not absorption.
B. cilia: Cilia move fluid or particles across cell surfaces (e.g., respiratory tract), not primarily for absorption.
C. microvilli: Microvilli are tiny projections on intestinal cells that increase surface area for nutrient absorption.
D. spindle fibers: Spindle fibers are used during cell division (mitosis), not absorption.

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Correct Answer is C

Explanation

A. osmosis: Osmosis is passive (requires no energy), so it will still occur even if mitochondria are poisoned.
B. facilitated diffusion: Facilitated diffusion uses transport proteins but does not require ATP-still functional without mitochondria.
C. active transport: Active transport requires ATP, which is produced by the mitochondria. Blocking mitochondria interrupts ATP production, halting active transport.
D. through channels: Movement through ion channels is usually passive (e.g., diffusion), and does not require ATP.

A. positively charged: cations B. negatively charged; cations C. positively charged; anions D. negatively charged; anions

Correct Answer is A

Explanation

A. positively charged; cations: Sodium (Na), potassium (K), and calcium (Ca) are metals that lose electrons, becoming positively charged ions, called cations.
B. negatively charged; cations: Cations are always positive. A negative ion is an anion.
C. positively charged; anions: The term anion refers to a negatively charged ion, not a positive one.
D. negatively charged; anions: These elements do not gain electrons-they lose them and do not become anions.

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Which of the following would be in abundance in the intestines where you need to increase surface area for absorption?

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Naxlex Comprehensive Predictor Exams

A selective poison that blocked the function of the mitochondria was used on a group of cells. Which of the following mechanisms for crossing the membrane would most likely be interrupted by the presence of this poison?

Correct Answer is C

Explanation

Due to the electrons in their orbitals, sodium, potassium and calcium tend to lose electrons when bonding. When these bonds are dissolved in water, these particles become ________ particles called ________

Correct Answer is A

Explanation

Which of the following would be in abundance in the intestines where you need to increase surface area for absorption?

A capillary wall cell membrane brings in particles dissolved in liquid by pinching off part of the membrane. This process would best be described as:

Which of the following factors would increase the rate of chemical reactions?

As you know, water mixes with other compounds to form a variety of mixes. Which of the following would best describe a mix where the particles are not dissolved but will precipitate out?

Which of these characteristics of life refer to an organism's interaction with the environment and maintaining homeostasis?

Which of the following would probably be caused by defective lysosomes?

You have isolated some DNA from liver cells. The base sequence of one strand of the DNA is TAGCCGA. The complementary sequence of bases on the complementary RNA must be:

Which of the following is consistent with homeostasis?