Answer the following question given this paragraph: Microtubules , shown in Figure below (a) , are hollow cylinders and are the thickest of the cytoskeleton structures. They are most commonly made of filaments which are polymers of alpha and beta tubulin, and radiate outwards from an area near the nucleus called the centrosome. Tubulin is the protein that forms microtubules. Two forms of tubulin, alpha and beta, form dimers (pairs) which come together to form the hollow cylinders. The cylinders are twisted around each other to form the microtubules. Microtubules help the cell keep its shape. They hold organelles in place and allow them to move around the cell, and they form the mitotic spindle during cell division. Microtubules also make up parts of cilia and flagella, the organelles that help a cell move. Q: What are hollow cylinders and are the thickest of the cytoskeleton structures? Choices: - vesicles - cytoplasm - nucleotides - microtubules A:
microtubules
Answer the following question given this paragraph: Anemia is a disease that occurs when there is not enough hemoglobin in the blood to carry oxygen to body cells. Hemoglobin is the blood protein that normally carries oxygen from the lungs to the tissues. Anemia leads to a lack of oxygen in organs. Q: What is the name of the blood protein that carries oxygen from the lungs to the body's assorted tissues? Choices: - insulin - plasma - White Blood cells - hemoglobin A:
hemoglobin
Q: Answer the following question given this paragraph: The first plants probably evolved from aquatic green algae. They had male and female reproductive organs. However, they lacked true stems, roots, and leaves. Q: The first plants probably evolved from what? Choices: - dry green algae - moss - mould - aquatic green algae A:
A: aquatic green algae
Question: Answer the following question given this paragraph: In polar covalent bonds, electrons are not shared equally between the two atoms, so one atom is slightly negative in charge and one is slightly positive in charge. In nonpolar covalent bonds, electrons are shared equally so the atoms remain neutral in charge. Q: Electrons are not shared equally between the two atoms in which type of covalent bonds? Choices: - wide - narrow - solar - polar A:
Answer: polar
*Question*
Answer the following question given this paragraph: Muscle Tone Skeletal muscles are rarely completely relaxed, or flaccid. Even if a muscle is not producing movement, it is contracted a small amount to maintain its contractile proteins and produce muscle tone. The tension produced by muscle tone allows muscles to continually stabilize joints and maintain posture. Muscle tone is accomplished by a complex interaction between the nervous system and skeletal muscles that results in the activation of a few motor units at a time, most likely in a cyclical manner. In this manner, muscles never fatigue completely, as some motor units can recover while others are active. The absence of the low-level contractions that lead to muscle tone is referred to as hypotonia or atrophy, and can result from damage to parts of the central nervous system (CNS), such as the cerebellum, or from loss of innervations to a skeletal muscle, as in poliomyelitis. Hypotonic muscles have a flaccid appearance and display functional impairments, such as weak reflexes. Conversely, excessive muscle tone is referred to as hypertonia, accompanied by hyperreflexia (excessive reflex responses), often the result of damage to upper motor neurons in the CNS. Hypertonia can present with muscle rigidity (as seen in Parkinson's disease) or spasticity, a phasic change in muscle tone, where a limb will "snap" back from passive stretching (as seen in some strokes). Q: What is defined as a phasic change in muscle tone? Choices: - elasticity - gastrointestinal - susceptibility - spasticity A:
**Answer**
spasticity
(Question)
Answer the following question given this paragraph: Thunderstorms grow where ground temperatures are extremely high. Q: Are thunderstorms more likely where the ground temperatures are extremely high or extremely low? Choices: - somewhat low - somewhat high - extremely low - extremely high A:
(Answer)
extremely high