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Invertebrate Silk Gland

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Questions and Answers

Why does the mother mouse not gain weight despite needing to eat enough food for four times her body weight?

Most of the ingested energy is transferred as potential energy to the young in the breast milk. (correct)

The mother mouse has a genetic mutation that inhibits weight gain during lactation.

The mother mouse loses weight due to increased physical activity in caring for the litter.

The mother mouse has a very high metabolism that prevents weight gain.

What is the purpose of sweating in mammals like humans?

To decrease heat loss

To regulate body temperature (correct)

To produce more body fat

To increase body temperature

How does evaporative heat loss occur in mammals?

Through decreased metabolism

Through increased intake of food

Through reduced sweating

Through evaporation of sweat from the body surface (correct)

What is the main function of glandular secretions like sweat in mammals?

To regulate body temperature Signup and view all the answers

Why can humans survive in a sauna at high temperatures?

Thanks to sweating and evaporative cooling Signup and view all the answers

How does the total weight of newborn mice at weaning compare to the mother's weight?

Four times the mother's weight Signup and view all the answers

What is the main function of silk glands in invertebrates?

To produce protective cocoons Signup and view all the answers

Why is there little commercial use of spider silk compared to silk moth silk?

There are difficulties in harvesting spider silk Signup and view all the answers

What is a characteristic feature of spiders' ability to capture prey with webs?

They detect prey through vibrations on the web Signup and view all the answers

Which spider species mentioned in the text does not rely on web-making to capture prey?

Tarantula spider Signup and view all the answers

What is the primary purpose of glands with high secretory activity in animals?

To support lactation and milk production Signup and view all the answers

How does the energy expenditure of a nursing mother compare to that of a long-distance runner according to the text?

$10$ times higher Signup and view all the answers