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Veronica Kincaid

SCI 221-23 Midterm Nightingale Weeks 1-6

QuestionAnswer
Processes for maintaining or restoring homeostasis are known as homeostatic control mechanisms.
Which level of control operates at the cell level, often using genes and enzymes to regulate cell function? intracellular regulation
Local control or _____, intrinsic mechanisms often make use of chemical signals. autoregulation
Extrinsic control usually involves which mode of regulation? Both A and B are correct, nervous, endocrine
The body’s thermostat is located in the: hypothalamus
Which of the following is not one of the major groups of organic substances in the human body? Salts
Which of the following is not true of carbohydrates? All of the above are true of carbohydrates, they include substances commonly called sugars, they are the body’s primary source of energy. They are a part of both DNA and RNA.
Which lipid acts as a “tissue hormone”? Prostaglandin
Materials can be moved from a low concentration to a high concentration through: active transport.
The correct order of the phases of mitosis is: prophase, metaphase, anaphase, telophase.
All of the following are examples of passive transport except: endocytosis.
Which cells help destroy pathogens and damaged tissue in the brain? Microglia
Which cells electrically insulate axons to increase the speed of conduction? Both A and B, Oligodendrocytes and Schwann cells
Which of the following vitamins is(are) absorbed through the skin? All of the above, Vitamin K, D, and A
What structure is formed by the union of the basal and reticular lamina? Basement membrane
Bones act as a reservoir for which of the following minerals? Both B and C, Calcium and Phosphorus
The cell organelles that synthesize organic matrix substances in bone formation are: endoplasmic reticulum and Golgi apparatus.
Kicking a football is accomplished by knee: extension.
The contractile unit of a muscle cell is the sarcomere.
Which of the following proteins found in myofilaments contains the cross-bridges? Myosin
Three phases of the twitch contraction are the latent period, contraction phase, and relaxation phase.
The type of movement that occurs when the head is dropped to the shoulder, then to the chest, to the other shoulder, and toward the back is: circumduction.
Muscle contractions will continue as long as: the calcium ions are attached to the troponin.
The type of movement possible at a synovial joint depends on the: shape of the articulating surfaces of the bones.
A membrane carrier structure attracts a solute to a binding site, changes shape, and releases the solute on the other side of the cell membrane. This describes the process of: carrier-mediated transport.
The pairing of bases of a strand of DNA is obligatory. If a strand of DNA were composed of the base sequence of ATCG, what would be the obligatory sequence of its opposing base pairs? TAGC
Two solutions of different concentrations of glucose are separated by a membrane that allows both glucose and water to pass through. When dynamic equilibrium is reached, there will be: an even exchange of material across the membrane.
A saline solution that contains a higher concentration of salt than a red blood cell would be: hypertonic.
Extensive weight training causes the muscle cells to: hypertrophy.
Diffusion of particles through a membrane by means of a carrier molecule is called: facilitated diffusion.
All of the following occur as a result of meiosis except: chromosome number remains at 46.
Phagocytosis is an example of: endocytosis.
Which of the following terms is synonymous with tumor? Neoplasm
During which stage of mitosis do the centrioles move to the opposite poles of the cell? Prophase
Materials can be moved from a low concentration to a high concentration through: active transport.
Transcription can be best described as the: synthesis of mRNA.
All of the following occur as a result of meiosis except: chromosome number remains at 46.
Created by: veronicakncd
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