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Microbial Physiology
Microbial physiology is the branch of microbiology that is associated with studying the physiology of fungi, bacteria, and viruses. It is an important field of science concerning functional genomics and metabolic engineering.
Chemotaxis
The organism’s movement in a particular direction as a response to certain chemicals that are available in the environment is defined as chemotaxis. In brief, it can be defined as the occurrence of an organism’s movement in response to a certain chemical stimulus.
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- Which of these statements about homeostasis is true? a.The internal environment is maintained absolutely constant. b.Negative feedback mechanisms act to correct deviations from a normal range within the internal environment. c.Homeostasis is maintained by turning effectors on and off. d.All of these are true.Which of the following is not true for f negative feedback loops? A. In a negative loop, the response to the signal or stimulus decreases the original signal or stimulus. B. Negative feedback loops maintain homeostasis. C. Negative feedback loops are temporary. D. There are many more instances of negative feedback loops in the human body than positive feedback loops.which of the following situations illustrates that a homeostatic mechanism is not operating properly? a. acute high blood pressure b. normalized blood glucose levels c. dailt fluid intake equals dailty fluid output d. all of these illustrate homestatic mechanisms operating properly
- What is the most likely homeostatic response to an increase in environmental temperature? A. Blood vesse! Constriction 5. B. Producing sweat C. Shivering and muscle contraction D. Goose bump formation 6. What could happen due to a failure in homeostasis? A. The accumulation of waste products B. The loss of excess water from the body C. Maintaining excess levels of sugar in the body D. All of the above are potential outcomes of failure of homeostasis. 7. Which of the following is true when the body is under homeostasis? A. The body cannot generate its own heat in very cold conditions B. The body is under dynamic equilibrium C. The body is able to self-sustain without anything from the environment D. None of the o' ve *46Match the body temperature control item to the appropriate location in the negative feedback loop. Effector when variable is low Effector when variable is high Control center Sensor Controlled variable A. Muscles for shivering and goosebumps B. Nerves in skin C. Brain D. Sweat glands E. TemperatureLiving things can be distinguished from nonliving things because they havea. complexity. c. cellular organization.b. movement. d. response to a stimulus
- Which of these is an example of negative feedback?a. Air conditioning switches off when room temperature lowers.b. Insulin decreases blood sugar levels after eating a meal.c. Heart rate increases when blood pressure drops.d. All of these are examples of negative feedback.1. Which of the following is one of the four basic cell types in the body? a. respiratory b. epithelial c. endocrine d. integumentary Tile e. immune 2. Which of the following is incorrect? a. Equilibrium requires a constant input of energy. Tile b. Positive feedback is less common in nature than negative feedback. c. Homeostasis does not imply that a given variable is unchanging. d. Fever is an example of resetting a set point. e. Efferent pathways carry information away from the integrating center of a reflex arc.Which of the following is a way that the body determines how much of a certain chemical, protein, enzyme, or response is needed to maintain homeostasis? A. Resource limitation, B. Feedback inhibition, C. Kickback inhibition, D. Signal loop
- Which one of the following statement is correct for positive feedback? Select one: of O a. A positive feedback system is stable over time, maintaining a steady state. O b. A positive feedback loop is a control system that acts to maintain the level of some variation within a given estion 60 range following a disturbance. O c. Step changes in a controlled variable will return the system to its original state using positive feedback. O d. Positive feedback oCcurs when a system moves from one set point to another. One type of positive feedback moves the control parameter to a value outside that normally maintained by negative feedback. Finish attempt . us page Show all aeens.Gam..mkv E The Queens.Gam..mkv EN E ) ll 03:31 7400 lenovo Insert Home Pause PrtSc ScrLkWhen faced with a sudden drop in environmental temperature, an endothermic animal will _______. a. experience a drop in its body temperature b. wait to see if it goes lower c. increase muscle activity to generate heat d. add fur or fat to increase insulationwhich of the following statements are true about homeostasis? Select all that apply. a. The selective permeability of the cell membrane allows for thermoregulation. b. Homeostasis is an organism‘s way of maintaining constant and balanced internal processes. c. Ectotherms rely on environmental heat to maintain homeostasis. d. Homeostasis works by a system of positive feedback.