Question 1

Which is not characteristic of the endocrine system
A)Effects: causes metabolic activity changes in target cells
B)Response time: slow reaction time = seconds to hours
C)Duration of response: long-lasting = minutes to weeks
D)Recovery time: rapid,immediate return to prestimulation level
E)Communication method: hormones in the bloodstream

Accepted Answer

Recovery time for the endocrine system is not rapid as it takes time for the hormones to be metabolized and eliminated from the body. The recovery time varies depending on the hormone and the individual's metabolism.

Question 2

Compared to the nervous system,the endocrine system has
A)more localized and long-lasting effects.
B)more widespread and long-lasting effects.
C)more localized and short-term effects.
D)more widespread and short-term effects.

Accepted Answer

The endocrine system secretes hormones into the bloodstream, allowing for widespread and long-lasting effects on target cells and tissues throughout the body, in contrast to the nervous system, which typically has more localized and short-term effects through neurotransmitter release at synapses.

Question 3

Endocrine glands
A)are ductless glands.
B)are the organs of the endocrine system.
C)secrete hormones directly into the bloodstream.
D)help maintain homeostasis.
E)All of the choices are correct.

Accepted Answer

All of the choices are correct. Endocrine glands are ductless organs that secrete hormones directly into the bloodstream, helping to maintain homeostasis in the body.

Question 4

Eicosanoids are a primary type of local hormone.

Accepted Answer

Eicosanoids are a type of local hormone that are produced and act locally in the tissues where they are synthesized. They are not transported in the bloodstream to distant targets, like endocrine hormones.

Question 5

Modified amino acids that act as hormones are referred to as ________ amines.

Accepted Answer

The answer of Modified amino acids that act as hormones...

Question 6

Follicle-stimulating hormone is a
A)glycoprotein.
B)steroid.
C)monoamine.
D)oligopeptide.

Accepted Answer

Follicle-stimulating hormone (FSH) is a glycoprotein hormone secreted by the anterior pituitary gland. It consists of two subunits, alpha and beta, and is involved in the regulation of the gonads and fertility.

Question 7

Parathyroid hormone release depends on blood levels of calcium.Such an endocrine reflex is said to be initiated by
A)hormonal stimulation.
B)humoral stimulation.
C)neural stimulation.
D)positive feedback stimulation.

Accepted Answer

The release of parathyroid hormone is stimulated by changes in the blood levels of calcium, which is considered to be a humoral stimulus, as it is based on the presence of certain substances (in this case, calcium ions) in the blood. Hormonal stimulation involves the release of one hormone in response to another hormone, while neural stimulation involves the release of hormones in response to signals from the nervous system. Positive feedback stimulation involves a cycle of self-reinforcing stimuli, which is not the case for parathyroid hormone release.

Question 8

Among their many functions,hormones regulate blood volume,cellular concentration,and number of platelets.

Accepted Answer

Hormones do indeed play a role in regulating blood volume, cellular concentration, and platelet numbers. For example, hormones like antidiuretic hormone and aldosterone help to control water and salt levels in the blood, which in turn affects blood volume. Hormones also play a role in stimulating the production and maturation of red and white blood cells, which can affect cellular concentration. And certain hormones, like thrombopoietin, can influence the production and release of platelets from the bone marrow.

Question 9

The liver contains endocrine cells.

Accepted Answer

The answer of The liver contains endocrine cells....

Question 10

The hormones and neurotransmitters released by the endocrine and nervous systems are chemical substances referred to as _________.

Accepted Answer

The answer of The hormones and neurotransmitters released by the...

Question 11

Steroids,peptides,and nucleic acids are the three classes of hormones.

Accepted Answer

The answer of Steroids,peptides,and nucleic acids are the three classes...

Question 12

Although hormones influence activity in the neural and reproductive systems,they do not influence the digestive system.

Accepted Answer

Hormones do have an influence on the digestive system, such as the hormone gastrin, which stimulates the release of stomach acid and enzymes. Other hormones, such as insulin and glucagon, play a role in regulating blood sugar levels and metabolism, which affects digestion.

Question 13

Thyroid hormone is somewhat unique in that it is a
A)biogenic amine that is lipid-soluble.
B)protein hormone that is water-soluble.
C)steroid hormone that is water-soluble.
D)steroid hormone that is lipid-soluble.
E)monoamine that is water-soluble.

Accepted Answer

The answer of Thyroid hormone is somewhat unique in that...

Question 14

Aldosterone release can be triggered by the presence of the blood-borne messenger angiotensin II or by low levels of sodium,and so its secretion regulation is said to be
A)purely neural.
B)both hormonal and humoral.
C)both antagonistic and synergistic.
D)both neural and synergistic.
E)purely hormonal.

Accepted Answer

Aldosterone release can be triggered by both hormonal (angiotensin II) and humoral (low levels of sodium) factors, making its secretion regulation both hormonal and humoral.

Question 15

The reaction time for endocrine effects is generally measured in milliseconds.

Accepted Answer

The reaction time for endocrine effects is generally measured in minutes, hours or sometimes even days, not in milliseconds.

Question 16

Eicosanoids are synthesized from
A)cholesterol.
B)prostaglandin.
C)arachidonic acid.
D)amino acids.

Accepted Answer

Eicosanoids are a group of signaling molecules that are synthesized from polyunsaturated fatty acids, particularly arachidonic acid. They are involved in many physiological processes, including inflammation, fever, and the regulation of blood pressure.

Question 17

The parathyroid glands are located
A)just below the thalamus.
B)within the thymus.
C)above the kidneys.
D)anterior to the thyroid gland.
E)posterior to the thyroid gland.

Accepted Answer

The answer of The parathyroid glands are located
A)just below the...

Question 18

The small,cone-shaped gland that is in the epithalamus of the brain is the _______ gland.

Accepted Answer

The answer of The small,cone-shaped gland that is in the...

Question 19

Protein hormones are
A)lipid-soluble.
B)water-soluble.
C)soluble in both water and lipids.
D)soluble in neither water nor lipids.

Accepted Answer

Protein hormones are water-soluble because they are composed of amino acids, which are hydrophilic and interact with the aqueous environment of the bloodstream. They cannot cross the plasma membrane of target cells without the assistance of membrane receptors.

Question 20

Each of the body's blood-borne hormones comes from the major endocrine glands,namely,the pineal,pituitary,thyroid,parathyroid,or adrenal glands.

Accepted Answer

Not all blood-borne hormones come from the major endocrine glands listed; other organs like the pancreas, ovaries, testes, and even the heart also produce hormones.

Quiz 17: Endocrine System

Which is not characteristic of the endocrine system

Compared to the nervous system,the endocrine system has

Endocrine glands

Eicosanoids are a primary type of local hormone.

Modified amino acids that act as hormones are referred to as ________ amines.

Follicle-stimulating hormone is a

Parathyroid hormone release depends on blood levels of calcium.Such an endocrine reflex is said to be initiated by

Among their many functions,hormones regulate blood volume,cellular concentration,and number of platelets.

The liver contains endocrine cells.

The hormones and neurotransmitters released by the endocrine and nervous systems are chemical substances referred to as _________.

Steroids,peptides,and nucleic acids are the three classes of hormones.

Although hormones influence activity in the neural and reproductive systems,they do not influence the digestive system.

Thyroid hormone is somewhat unique in that it is a

Aldosterone release can be triggered by the presence of the blood-borne messenger angiotensin II or by low levels of sodium,and so its secretion regulation is said to be

The reaction time for endocrine effects is generally measured in milliseconds.

Eicosanoids are synthesized from

The parathyroid glands are located

The small,cone-shaped gland that is in the epithalamus of the brain is the _______ gland.

Protein hormones are

Each of the body's blood-borne hormones comes from the major endocrine glands,namely,the pineal,pituitary,thyroid,parathyroid,or adrenal glands.