Q: What kind of muscle cells undergo twitch-type contractions with long refractory periods followed by brief relaxation periods, allowing the heart to fill with blood for the next cycle? Read this paragraph and choose the correct option from the provided answers: Cardiac muscle undergoes aerobic respiration patterns, primarily metabolizing lipids and carbohydrates. Myoglobin, lipids, and glycogen are all stored within the cytoplasm. Cardiac muscle cells undergo twitch-type contractions with long refractory periods followed by brief relaxation periods. The relaxation is essential so the heart can fill with blood for the next cycle. The refractory period is very long to prevent the possibility of tetany, a condition in which muscle remains involuntarily contracted. In the heart, tetany is not compatible with life, since it would prevent the heart from pumping blood. Choices: - nervous muscle - skeletal muscle - smooth muscle - cardiac muscle A:
cardiac muscle

(Question)
Q: What is the term for a combination of substances in which there is no chemical reaction? Read this paragraph and choose the correct option from the provided answers: Like a chemical compound, a mixture consists of more than one chemical substance. Unlike a compound, a mixture does not have a fixed chemical composition. The substances in a mixture can be combined in any proportions. A mixture also does not involve a chemical reaction. Therefore, the substances in a mixture are not changed into unique new substances, and they can be separated from each other without a chemical reaction. Choices: - a combination - a solute - a solution - a mixture A:
(Answer)
a mixture

Ques: Q: What are hydrocarbons that contain only single bonds between carbon atoms called? Read this paragraph and choose the correct option from the provided answers: Saturated hydrocarbons are hydrocarbons that contain only single bonds between carbon atoms. They are the simplest class of hydrocarbons. They are called saturated because each carbon atom is bonded to as many hydrogen atoms as possible. In other words, the carbon atoms are saturated with hydrogen. You can see an example of a saturated hydrocarbon in the Figure below . In this compound, named ethane, each carbon atom is bonded to three hydrogen atoms. In the structural formula, each dash (-) represents a single covalent bond, in which two atoms share one pair of valence electrons. Choices: - caloric hydrocarbons - unsaturated hydrocarbons - carcinogenic hydrocarbons - saturated hydrocarbons A:
Ans: saturated hydrocarbons

(Q).
Q: Solids and liquids are phases of matter that have their own unique what? Read this paragraph and choose the correct option from the provided answers: Solids and liquids are phases that have their own unique properties. Choices: - volumes - temperatures - masses - properties A:
(A).
properties

Ques:Q: What types of incest behaviors are controlled by genes? Read this paragraph and choose the correct option from the provided answers: Insects are capable of a surprising range of behaviors. Most of their behaviors, such as flying and mating, are instinctive. These are behaviors that don't need to be learned. They are largely controlled by genes. However, some insect behaviors are learned. For example, ants and bees can learn where food is located and keep going back for more. Choices: - byproduct behaviors like flying and mating - psychological behaviors like flying and mating - physical behaviors like flying and mating - instinctive behaviors like flying and mating A:

Ans:instinctive behaviors like flying and mating

Ques: Q: What is the cause of most ocean waves? Read this paragraph and choose the correct option from the provided answers: Most ocean waves are caused by winds. The size of a wave depends on how fast, how far, and how long the wind blows. Tsunamis are waves caused by earthquakes. Choices: - tides - Magnetic pull - Gravity - winds A:
Ans:
winds