Question 1

Which of the following best describes the difference between the nervous system and the endocrine system in controlling body functions?

Accepted Answer

The nervous system uses electrical impulses for rapid, short-term responses, while the endocrine system uses hormones for slower, long-lasting responses.

Question 2

Which of the following is NOT a step in hormone secretion?

Accepted Answer

Binding of the hormone to its target cell receptor

Question 3

A patient is diagnosed with acromegaly. Which of the following best explains the underlying cause of this disorder?

Accepted Answer

Excess secretion of growth hormone after the epiphyseal plates have closed

Question 4

Which of the following statements about steroid hormones is TRUE?

Accepted Answer

Steroid hormones are hydrophobic and bind to intracellular receptors.

Question 5

Which hormone interaction is described as two hormones working together to produce a greater effect than either alone, and which is an example?

Accepted Answer

Synergistic; glucagon and epinephrine increasing blood glucose

Question 6

Which of the following best describes the negative feedback loop regulating erythropoiesis?

Accepted Answer

Low oxygen levels stimulate the kidneys to release erythropoietin, which increases red blood cell production, restoring oxygen levels.

Question 7

A patient with Graves’ disease is likely to exhibit which of the following symptoms due to hyperthyroidism?

Accepted Answer

Increased metabolic rate, weight loss, and heat intolerance

Question 8

Which of the following is a function of the hormone secreted by the parathyroid gland?

Accepted Answer

Increase blood calcium levels by stimulating osteoclast activity

Question 9

Which of the following best explains why cortisol is called the 'stress hormone'?

Accepted Answer

It is released in response to stress and increases blood glucose, suppresses immune function, and promotes protein breakdown.

Question 10

Which of the following is a primary endocrine function of the pancreas?

Accepted Answer

Regulation of blood glucose levels by secreting insulin and glucagon

Question 11

A patient with Type I Diabetes Mellitus has which of the following changes in pancreatic islets?

Accepted Answer

Destruction of beta cells leading to decreased insulin production

Question 12

Which of the following is a major function of melatonin secreted by the pineal gland?

Accepted Answer

Regulation of circadian rhythms and sleep-wake cycles

Question 13

Which of the following is NOT a formed element in blood?

Accepted Answer

Plasma

Question 14

Which equation correctly represents hematocrit calculation?

Accepted Answer

Hematocrit $$= \frac{	ext{Volume of erythrocytes}}{	ext{Total blood volume}} 	imes 100$$

Question 15

Which of the following best explains the fate of the iron component of hemoglobin after erythrocyte destruction?

Accepted Answer

It is recycled and transported by transferrin to the bone marrow for new erythrocyte synthesis.

Question 16

Which of the following is a function of neutrophils?

Accepted Answer

Phagocytosis of bacteria and debris

Question 17

Which of the following best describes the role of platelets and fibrinogen in coagulation?

Accepted Answer

Platelets initiate clot formation, and fibrinogen is converted to fibrin to stabilize the clot.

Question 18

A patient receives a mismatched blood transfusion. Which of the following is the most likely consequence?

Accepted Answer

The recipient's antibodies attack the donor's erythrocytes, causing agglutination and hemolysis.

Question 19

Which blood type is considered the universal donor, and why?

Accepted Answer

Type O, because it has no surface antigens on erythrocytes.

Endocrine System and Blood: Comprehensive Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard