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To suggest:
The reason behind the laying of eggs by most of the birds in spring.
Introduction:
There are various methods of reproduction such as oviparity, viviparity, and ovoviviparity. In oviparity, the females lay eggs. The eggs are very little or not at all developed inside the mother. The development of fetus takes place after the laying of the egg.
To describe:
The reason for keeping the light on at night by the poultry farmers in the chicken coops.
Introduction:
The egg laying process in birds is a complex process and is affected by several factors such as daylight time. Some of the farmers keep lights on at night in the coops of chicken.
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Chapter 38 Solutions
Biology: Life on Earth with Physiology Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
- Describe how hormone receptors can play a role in affecting the size of the responses of tissues to hormones.arrow_forwardHow do hormones compare structurally and functionally in invertebrates and vertebrates?arrow_forwardWhat is the function of the hormone erythropoietin? a. stimulates production of red blood cells b. stimulates muscle growth c. causes the fight-or-flight response d. causes testosterone productionarrow_forward
- In your opinion, what is the significance of having the right cell receptors for a specific hormone? Provide an example to support your answer.arrow_forwardThe brown-nosed tweety bird can be found in both urban and wild environments. Researchers collected 100 birds from a forest, and divided them into two groups of 50 birds, each with 25 males and 25 females. One group was released into the forest and the other into a nearby city. After 1 year, a group of hardworking students collected all 100 birds and measured stress indices associated with signalling by their "stress glucocorticoid hormone", corticosterone (a steroid). They find that compared to the forest birds, the urban birds have greater levels of a stressed phenotype. Which of the following observations is MOST LIKELY to be part of the explanation for this observation? The urban birds have similar levels of corticosterone, but higher levels of the membrane receptor for this glucocorticoid The urban birds have genetic differences in their glucocorticoid receptor to give it higher affinity, making them more sensitive to corticosterone. The urban birds have lower expression of genes…arrow_forwardWhat is the main difference between organizing effects and activating effects of hormones?A. Organizing effects are long-lasting, whereas activating effects are temporary.B. Organizing effects alter brain activity, whereas activating effects alter other parts of the body.C. Organizing effects are excitatory, whereas activating effects are inhibitory.D. Organizing effects depend on estrogens, whereas activating effects depend on androgens.arrow_forward
- Explain why only certain cells respond to hormones even though all cells in the body are exposed to the hormone.arrow_forwardWhich statement best describes the relationship between the Endocrine and Nervous Systems? Both systems work with the Urinary System to maintain acid-base balance in the blood Both systems regulate hair growth, temperature regulation, and hydration Both systems modulate the stress response, sleep/wake cycles, and metabolism Both systems work with the Urinary System to activate Vitamin Darrow_forwardWhich is the defining feature of hormones?a. They are only produced in endocrine glands.b. They are secreted into the blood, where they may reach one or moretypes of distant target cells, thereby altering cell function throughoutthe body. c. They are released only by neurons.d. They are never released by neurons.e. They are secreted into ducts, where they diffuse to another nearbygland or other structure.arrow_forward
- In general, when do hormones produce "organizing” effects?   a. temporarily at any time in life   b. whenever the levels of some other hormone have decreased   c. during early stages in development   d. during adulthood  Movement of the head is detected by and communicated to the brain by which system?   a. Facial system   b. Auditory system   c. Cranial system   d. Vestibular systemarrow_forwardScientists have noticed a disturbing trend in the freshwater ecosystems in North America: a large number of male fish are found to contain female egg cells growing inside their testes. The feminization of male fish is called intersex, and its exact cause is still baffling many scientists. Many studies have shown that intersex can be induced when male fish are exposed to endocrine disruptors. An endocrine disruptor stimulates or inhibits the endocrine system, causing either an increase or decrease in hormone production. However, it is easier to demonstrate the direct cause and effect in a laboratory environment where the fish are only exposed to a single endocrine disruptor. In nature, there are many other variables such as low oxygen levels or warmer water temperatures that could also cause feminization in fish. What can we, as a society or as individuals, do to protect our ecosystems and watersheds from endocrine disruptors?arrow_forwardHuman hormones control everything within the body (as well as the behaviors of others around us). select one hormone and discuss what would happen to the body if it was no longer produced, if too much of it were to appear in the body, and what you could do about it if levels were incorrect.arrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax CollegeBiology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningHuman Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
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