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Which is not active in bone resorption?
Which is not active in bone resorption?A . osteoblastsB . osteoclastsC . nephronsD . small intestineView AnswerAnswer: A Explanation: Bone resorption, the decomposition of bone for absorption of minerals, including calcium, directly involves osteoclasts. Nephrons and the small intestine both absorb released Ca2+. Osteoblasts function to construct, not decompose, bones.
Which cells make up the insulated wrapping on axons?
Which cells make up the insulated wrapping on axons?A . Schwann cellsB . astrocytesC . microgliaD . macrocytesView AnswerAnswer: A Explanation: Axons are surrounded by insulating cells called Schwann cells. This insulation enables action potentials to travel rapidly throughout the nervous system.
When a population reaches its carrying capacity?
When a population reaches its carrying capacity?A . The population size begins to decrease.B . The population growth rate approaches zero.C . Other populations will be forced out of the habitat.D . Density-independent factors no longer play a role.E . Density-dependent factors no longer play a role.View AnswerAnswer: B Explanation:...
Which of the following will result if there is a drop-in blood pressure?
Which of the following will result if there is a drop-in blood pressure?A . formation of glucoseB . secretion of insulinC . secretion of EPOD . secretion of ANPView AnswerAnswer: C Explanation: A drop-in blood pressure causes the renal cortex of the kidney to secrete EPO (erythropoietin) in an effort...
Which of the following should be added to denature a protein all the way back to primary structure?
Which of the following should be added to denature a protein all the way back to primary structure?A . reducing agentB . oxidizing agentC . waterD . etherView AnswerAnswer: A Explanation: In order to denature proteins to their primary structure, a reducing agent is necessary to cleave the disulfide bonds...
Which pathway accounts for the least amount of ATP generated (by the pathway)?
Which pathway accounts for the least amount of ATP generated (by the pathway)?A . glycolysisB . TCA cycleC . ETCD . all have an equal number of ATP madeView AnswerAnswer: B Explanation: The generation of most to least ATP is as follows: ETC, which can produce 32 ATP; Glycolysis, which...
Which of the following chemical moieties forms the backbone of DNA?
When blood flow to human tissue is interrupted, the lack of sufficient blood supply is called ischemia. If ischemia is not restored quickly, the affected tissue may undergo a process called infarction, which involves a series of chemical changes that damage the tissue. The lack of blood supply results in...
Why does the lactic acid pathway predominate in anaerobic respiration?
Why does the lactic acid pathway predominate in anaerobic respiration?A . because the lactic acid can be made into oxygen when neededB . because O2 is needed for the creation of NADHC . because O2 is required for glycolysisD . without O2 there is no electron acceptor for the ETCView...
What is the frequency of individuals expressing the dominant trait?
In a certain genetically stable population, the frequency of a recessive allele (for a trait with two alleles) is 0.6. What is the frequency of individuals expressing the dominant trait?A . 0.64B . 0.36C . 0.24D . 0.16View AnswerAnswer: A Explanation: The question stem asks you to determine the frequency...
Which of the following most recently evolved to its present state?
Which of the following most recently evolved to its present state?A . ponsB . cerebrumC . cerebellumD . medulla oblongataView AnswerAnswer: B Explanation: The medulla oblongata and the pons make up the brain stem, which evolved earliest. The cerebellum evolved next, followed by the cerebrum.
