Problem:OPTIONS:
- food
- heating
- osmosis
- energy

Answer the following question given this paragraph: A gated channel protein is a transport protein that opens a "gate," allowing a molecule to pass through the membrane. Gated channels have a binding site that is specific for a given molecule or ion. A stimulus causes the "gate" to open or shut. The stimulus may be chemical or electrical signals, temperature, or mechanical force, depending on the type of gated channel. For example, the sodium gated channels of a nerve cell are stimulated by a chemical signal which causes them to open and allow sodium ions into the cell. Glucose molecules are too big to diffuse through the plasma membrane easily, so they are moved across the membrane through gated channels. In this way glucose diffuses very quickly across a cell membrane, which is important because many cells depend on glucose for energy. Q: What do many cells depend on glucose for? A:
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A: energy

Problem:OPTIONS:
- ceramic gland
- bladder gland
- blood gland
- rectal gland

Answer the following question given this paragraph: animals exposed to similar levels of urea. Sharks are cartilaginous fish with a rectal gland to secrete salt and assist in osmoregulation. Q: What do sharks use to secrete salt to assist in osmoregulation? A:
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A: rectal gland

Problem:OPTIONS:
- yo-yo
- metronome
- pendant
- pendulum

Answer the following question given this paragraph: Pendulums are in common usage. Some have crucial uses, such as in clocks; some are for fun, such as a child's swing; and some are just there, such as the sinker on a fishing line. For small displacements, a pendulum is a simple harmonic oscillator. A simple pendulum is defined to have an object that has a small mass, also known as the pendulum bob, which is suspended from a light wire or string, such as shown in Figure 16.14. Exploring the simple pendulum a bit further, we can discover the conditions under which it performs simple harmonic motion, and we can derive an interesting expression for its period. Q: What is the common name for a simple harmonic oscillator, which basically consists of a small object suspended on a wire or string? A:
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A: pendulum

Problem:OPTIONS:
- breeding
- warmth
- determination
- nutrients

Answer the following question given this paragraph: Q: What is necessary for growth and energy? A:
****
A:
nutrients