Is the regulation of blood sugar levels in the body a negative feedback loop or a positive feedback loop?
A. negative feedback loop
B. positive feedback loop
A. negative feedback loop (Homeostatic circuits usually involve negative feedback loops.)
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Is a ribozyme a true enzyme?
a. Yes, because it is a catalyst. b. No, because it is not a protein. c. No, because it cannot catalyze a reaction. d. Yes, because it can synthesize a protein. e. No, because it doesn't require cofactors.
A neurologist diagnoses a patient with damage to the hippocampus. This observation is consistent with the difficulties the patient reports with
A. effectively coordinating movements once initiated. B. maintaining a steady and regular heartbeat. C. planning movements. D. forming memories of recent events. E. perceiving tactile stimulation from different regions of their body.
In mammals, the __________ is a temporary center for the formation of blood cells
a. amnion b. allantois c. yolk sac d. chorion e. archenterons
Examine Type 4 hypersensitivities by completing the sentence. Type 4 dysfunction is known as ______________ hypersensitivity for symptoms arise one to several days following secondary antigen exposure.
A) Xenografts B) Delayed C) Autografts D) Contact dermatitis E) MHC 1 F) T G) Tuberculin H) Allografts I) GVHD J) Type 4