Answer the following question given this paragraph: The speed of most waves depends on the medium through which they are traveling. Generally, waves travel fastest through solids and slowest through gases. That's because particles are closest together in solids and farthest apart in gases. When particles are farther apart, it takes longer for the energy of the disturbance to pass from particle to particle. Q: Do waves move faster when particles are close to each other or far away? Choices: - unaffected - far away - open - close A:
close
Answer the following question given this paragraph: membrane is a positive 15 mV, meaning that the membrane depolarizes from -70 mV to -55 mV, then the graded potentials will result in the membrane reaching threshold. For receptor potentials, threshold is not a factor because the change in membrane potential for receptor cells directly causes neurotransmitter release. However, generator potentials can initiate action potentials in the sensory neuron axon, and postsynaptic potentials can initiate an action potential in the axon of other neurons. Graded potentials summate at a specific location at the beginning of the axon to initiate the action potential, namely the initial segment. For sensory neurons, which do not have a cell body between the dendrites and the axon, the initial segment is directly adjacent to the dendritic endings. For all other neurons, the axon hillock is essentially the initial segment of the axon, and it is where summation takes place. These locations have a high density of voltage-gated Na+ channels that initiate the depolarizing phase of the action potential. Summation can be spatial or temporal, meaning it can be the result of multiple graded potentials at different locations on the neuron, or all at the same place but separated in time. Spatial summation is related to associating the activity of multiple inputs to a neuron with each other. Temporal summation is the relationship of multiple action potentials from a single cell resulting in a significant change in the membrane potential. Spatial and temporal summation can act together, as well. Q: What is the relationship of multiple action potentials from a single cell resulting in a significant change in the membrane potential? Choices: - nature summation - bipolar summation - distinct summation - temporal summation A:
temporal summation
Q: Answer the following question given this paragraph: the law of conservation of matter, which says that matter cannot be created or destroyed. This means we must have the same number of protons and neutrons on both sides of the nuclear equation. If our uranium nucleus loses 2 protons, there are 90 protons remaining, identifying the element as thorium. Moreover, if we lose four nuclear particles of the original 235, there are 231 remaining. Thus we use subtraction to identify the isotope of the Th atomin this case,. Q: The law of conservation of matter, which says that matter cannot be created or this? Choices: - abandoned - damaged - stopped - destroyed A:
A: destroyed
Question: Answer the following question given this paragraph: The Earth, Moon and Sun are linked together in space. Monthly or daily cycles continually remind us of these links. Every month, you can see the Moon change. This is due to where it is relative to the Sun and Earth. In one phase, the Moon is brightly illuminated - a full moon. In the opposite phase it is completely dark - a new moon. In between, it is partially lit up. When the Moon is in just the right position, it causes an eclipse. The daily tides are another reminder of the Moon and Sun. They are caused by the pull of the Moon and the Sun on the Earth. Tides were discussed in the Oceans chapter. Q: In what phase is the moon brightly illuminated? Choices: - crescent - new moon - blue moon - full moon A:
Answer: full moon
*Question*
Answer the following question given this paragraph: Muscle tissue is made up of cells that have the unique ability to contract, or become shorter. Muscles attached to bones enable the body to move. Q: What type of tissue is made up of cells that have the unique ability to contract? Choices: - connective tissue - epithelial tissue - nervous tissue - muscle tissue A:
**Answer**
muscle tissue
(Q).
Answer the following question given this paragraph: 7. Nuclear energy is energy that is stored in the nuclei of atoms because of the strong forces that hold the nucleus together. The energy can be released in nuclear power plants by splitting nuclei apart. It is also released when unstable (radioactive) nuclei break down, or decay. Q: What type of energy is stored in the nuclei of atoms? Choices: - light energy - radioactive energy - heat energy - nuclear energy A:
(A).
nuclear energy