It Is Known That Birds Can Detect the Earth's Magnetic $1.2$

question 281

Multiple Choice

It is known that birds can detect the earth's magnetic field, but the mechanism of how they do this is not known. It has been suggested that perhaps they detect a motional emf as they fly north to south, but it turns out that the induced voltages are small compared to the voltages normally encountered in cells, so this is probably not the mechanism involved. To check this out, calculate the induced voltage across the wingtips of a wild goose with a wingspan of $1.2$ mif it is flying directly south at $13 \mathrm {~m} / \mathrm { s }$ at a point where the earth's magnetic field is $5.0 \times 10 ^ { - 5 } \mathrm {~T}$ directed downward from the horizontal by $40 ^ { \circ }$ .

• A) \(0.060 \mathrm { mV }\)
• B) \(0.78 \mathrm { mV }\)
• C) \(0.50 \mathrm { mV }\)
• D) \(0.25 \mathrm { mV }\)
• E) \(0.60 \mathrm { mV }\)

Describe the major body cavities and their subdivisions.

Identify and describe the planes of the human body.

Understand the concept of homeostasis and its mechanisms.

Distinguish between positive and negative feedback mechanisms in the regulation of body functions.

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Definitions:

Conscientiousness

A personality trait characterized by being organized, responsible, and reliable, with a strong sense of duty.

Live Longest

Refers to individuals or groups of organisms that achieve the greatest lifespan within a specific population or species.

Type D Personality

A personality type characterized by the tendency towards negative affectivity and social inhibition, potentially leading to worse cardiovascular outcomes.

Distressed

Experiencing anxiety, sorrow, or pain; a state of mental suffering often triggered by external or internal stressors.