If the environment gets cold, we will often shiver in order to:

keep body temperature the same as the external temperature

Which of the following is an example of positive feedback to indirectly maintain homeostasis?

the chemical reactions involved in blood clotting

your blood vessels dilate and you begin to sweat in response to elevated body temperature

your blood vessels constrict and you begin to shiver in response to low body temperature

your coach compliments you on your performance in practice

allows animals to regulate their internal environment.

is only important under extreme conditions.

means that the body conditions never change.

depends only on the nervous system.

Target cells for hormones

have receptors for that hormone.

are the only cells exposed to that hormone.

are all the same for all hormones.

are those cells that respond to the hormone, but all cells are receptive to the hormone.

travels short distances between neighboring cells.

travels long distances throughout the body.

is completely different from endocrine signaling.

A newly discovered hormone is determined to be lipid soluble. Given that information, you would predict that the receptor for the hormone:

will be in the cytoplasm of the cell.

will be a transmembrane protein in the plasma membrane.

will be soluble in the lipid bilayer of the cell membranes.

will be a component in a signal transduction pathway.

An increase in the amount of body fat leads to the release of the hormone leptin. Target cells bind leptin and decrease food intake and increase energy expenditure, leading to a decrease in the amount of body fat. This represents:

antagonistic hormone pair feedback loop.

Secretin is stored in secretory vesicles before being released in response to a drop in pH in the duodenum. What is likely to be true about the hormone secretin?

Secretin is likely to be composed of amino acids.

Secretin is likely to be synthesized from cholesterol.

The secretin receptor is likely to interact directly with DNA.

The secretin hormone is likely to require a transport protein.

The ______________ and the _____________ coordinate nervous system inputs with endocrine outputs.

anterior pituitary: endocrine gland

receive signals from the nervous system and release hormones.

are not a part of homeostatic control mechanisms.

have target cells within other endocrine organs.

are released from the posterior pituitary.

are released from the hypothalamus.

have target cells within the hypothalamus.

The release of thyrotropin releasing factor is predicted to result in:

an increase in the blood concentration of thyroid hormones T 3 and T 4 .

a decrease in the blood concentration levels of thyroid stimulating hormone.

an increase in release of thyroid stimulating hormone by the hypothalamus.

a decrease in the blood concentration of thyroid hormones T 3 and T 4 .

A doctor orders a hormone test on a patient that is suspected of having hypothyroidism, low thyroid activity caused by a thyroid gland that is not functioning properly. Which of the following test results support this diagnosis?

An increase in TSH and a decrease in T 3 and T 4 .

An increase in T 3 and T 4 hormones.

A decrease in thyrotropin releasing hormone and TSH.

An increase in T 3 and a decrease in T 4 .

Homeostasis, Hormones and Feedback Control

Authored by Teneal Metcalf

Biology

9th Grade - University

NGSS covered

Used 170+ times

Homeostasis, Hormones and Feedback Control

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26 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is an example of a positive feedback mechanism?

Tags

NGSS.HS-LS1-3

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Maintaining body temperature is an example of a:

negative feedback loop

positive feedback loop

Tags

NGSS.HS-LS1-3

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The two types of feedback systems that help organisms maintain homeostasis are:

positive and negative

receptor and effector

static and dynamic

minor and major

Tags

NGSS.HS-LS1-3

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

If the calcium in your blood decreases below homeostasis levels, a gland in the brain will sense the decrease and send a chemical message to your bones. Your bones will release calcium into the blood, bringing blood calcium levels back up.

Positive Feedback Response

Negative Feedback Loop

Tags

NGSS.HS-LS1-3

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Rapid growth during puberty causes your body to release more and more growth hormones. As you grow, more and more growth hormones are released until puberty is reached, and then the hormones stop.

Positive Feedback Response

Negative Feedback Loop

Tags

NGSS.HS-LS1-3

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Homeostasis

allows for a wildly fluctuating internal environment

is impossible in vertebrates

is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation

is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation

Tags

NGSS.HS-LS1-3

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.

Positive Feedback Response

Negative Feedback Loop

Tags

NGSS.HS-LS1-3

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Homeostasis, Hormones and Feedback Control

What is an example of a positive feedback mechanism?

Maintaining body temperature is an example of a:

The two types of feedback systems that help organisms maintain homeostasis are:

If the calcium in your blood decreases below homeostasis levels, a gland in the brain will sense the decrease and send a chemical message to your bones. Your bones will release calcium into the blood, bringing blood calcium levels back up.

Rapid growth during puberty causes your body to release more and more growth hormones. As you grow, more and more growth hormones are released until puberty is reached, and then the hormones stop.

Homeostasis

When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.

These two body systems regulate feedback mechanisms.

If the environment gets cold, we will often shiver in order to:

Homeostasis in the human body is often maintained by a:

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