Q: Answer the following question given this paragraph: 20.7 Nerve ConductionElectrocardiograms Nerve Conduction Electric currents in the vastly complex system of billions of nerves in our body allow us to sense the world, control parts of our body, and think. These are representative of the three major functions of nerves. First, nerves carry messages from our sensory organs and others to the central nervous system, consisting of the brain and spinal cord. Second, nerves carry messages from the central nervous system to muscles and other organs. Third, nerves transmit and process signals within the central nervous system. The sheer number of nerve cells and the incredibly greater number of connections between them makes this system the subtle wonder that it is. Nerve conduction is a general term for electrical signals carried by nerve cells. It is one aspect of bioelectricity, or electrical effects in and created by biological systems. Nerve cells, properly called neurons, look different from other cellsthey have tendrils, some of them many centimeters long, connecting them with other cells. (See Figure 20.27. ) Signals arrive at the cell body across synapses or through dendrites, stimulating the neuron to generate its own signal, sent along its long axon to other nerve or muscle cells. Signals may arrive from many other locations and be transmitted to yet others, conditioning the synapses by use, giving the system its complexity and its ability to learn. Q: What carry messages from our sensory organs and others to the central nervous system? A:

OPTIONS:
- fibers
- valves
- blood vessels
- nerves

A: nerves

input: OPTIONS:
- cuticle
- scale
- epidermis
- bark Now, answer this question: Answer the following question given this paragraph: In trees, some of the epidermal tissue is replaced by bark. Bark is a combination of tissues that provides a tough, woody external covering on the stems of trees. The inner part of bark is alive and growing; the outer part is dead and provides strength, support, and protection. Q: What is the combination of tissues that provides a tough, woody external covering on the stems of trees called? A:
A:
output: bark

Answer the following question given this paragraph: The period to which a given element belongs can easily be determined from its electron configuration. For example, consider the element nickel (Ni). Its electron configuration is [Ar]3 d 8 4 s 2 . The highest occupied principal energy level is the fourth, indicated by the 4 in the 4 s 2 portion of the configuration. Therefore, nickel can be found in the fourth period of the periodic table. Q: In which period of the periodic table is nickel found? A:

OPTIONS:
- First Period
- Second Period
- Third Period
- fourth period

Answer: fourth period

Problem: OPTIONS:
- estimation
- frequency
- prediction
- accuracy
Q: Answer the following question given this paragraph: Accuracy means making measurements that are close to the true value. Q: What is making measurements that are close to the true value known as? A:
Answer: accuracy

Problem:OPTIONS:
- emit velocity
- shift velocity
- turning velocity
- angular velocity

Answer the following question given this paragraph: The angular velocity tells you how quickly the angle changes. In more formal language, the rate of change of , the angular position, is called the angular velocity . The direction of angular velocity is either clockwise or counterclockwise. Analogously, the rate of change of is the angular acceleration . Q: What term tells you how quickly the angle changes and can occur in either clockwise or counterclockwise directions? A:
****
A: angular velocity

Problem:OPTIONS:
- cholesterol
- saturated fatty acids
- lipids
- unsaturated fatty acids

Answer the following question given this paragraph: Fatty Acids. Saturated fatty acids have straight chains, like the three fatty acids shown on the left. Unsaturated fatty acids have bent chains, like all the other fatty acids in the figure. Q: What type of fatty acids have bent chains? A:
****
A:
unsaturated fatty acids