Diagram the basic steps of a stretch reflex arc.

What will be an ideal response?


Sensory neuron ? CNS ? Motor neuron ? Effector ? Response

Biology & Microbiology

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Depending on their environments, animals may lose electrolytes (select all correct choices):

A. across the gills. B. in sweat. C. in urine. D. in feces. E. across the skin.

Biology & Microbiology

Inflammation

a. is triggered by activated complement. b. is a non-specific, local response. c. results in redness due to increased blood flow. d. results in swelling due to diffusion of water into the tissue. e. is true of all of these

Biology & Microbiology

Your classmate does not have much muscle strength. Her doctor says she has an autoimmune disease, but you didn't quite catch the name the physician gave for the illness. Based on what you have learned, what do you think the diagnosis is?

A) Alzheimer's disease B) schizophrenia C) senility D) myasthenia gravis

Biology & Microbiology

Why do populations farther from Africa have more deleterious mutations in their genome?

A. Repeated bottlenecks and founder effects made genetic drift more intense more often. B. Populations farther from Africa have been exposed to more mutagens in the environment. C. Those populations have experienced more intense natural selection, so more deleterious alleles increased in frequency by genetic hitchhiking. D. As people migrated over the globe they interbred with Neanderthals and Denisovans. E. The populations are younger, so purifying selection has not had time to purge deleterious mutations from the populations.

Biology & Microbiology