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.)

Biology & Microbiology

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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.

Biology & Microbiology

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.

Biology & Microbiology

In mammals, the __________ is a temporary center for the formation of blood cells

a. amnion b. allantois c. yolk sac d. chorion e. archenterons

Biology & Microbiology

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

Biology & Microbiology