Q: Which of the following equations correctly represents the calculation of hematocrit?

$\text{Hematocrit} = \frac{\text{Volume of red blood cells}}{\text{Total blood volume}} \times 100$

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 signals for rapid, localized effects, while the endocrine system uses chemical messengers for slow, widespread effects.

Question 2

A patient is diagnosed with Cushing syndrome. Which hormone is most likely elevated in this condition?

Accepted Answer

Cortisol

Question 3

Which of the following equations correctly represents the negative feedback loop for blood glucose regulation involving insulin?

Accepted Answer

$[Insulin] \uparrow \Rightarrow [Glucose] \downarrow$

Question 4

Which of the following is a correct statement about hydrophilic hormones?

Accepted Answer

They require cell surface receptors because they cannot cross the plasma membrane.

Question 5

A patient with gigantism is most likely to have an excess of which hormone, and what is the primary effect?

Accepted Answer

Growth hormone; excessive growth of bones and tissues

Question 6

Which of the following best explains why blood type O is considered the universal donor?

Accepted Answer

Type O blood lacks A and B antigens, so it does not trigger an immune response in recipients.

Question 7

Which hormone is secreted by the adrenal medulla and is responsible for the 'fight or flight' response?

Accepted Answer

Epinephrine

Question 8

A patient presents with symptoms of hypoglycemia. Which hormone is most likely deficient?

Accepted Answer

Glucagon

Question 9

Which of the following equations correctly represents the calculation of hematocrit?

Accepted Answer

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

Question 10

Which of the following best describes the role of parathyroid hormone (PTH) in calcium homeostasis?

Accepted Answer

PTH increases calcium reabsorption in the kidneys and stimulates bone resorption to raise blood calcium levels.

Question 11

Which of the following is a major function of platelets in the blood?

Accepted Answer

Initiating blood clot formation

Question 12

A patient with Addison disease is most likely to have a deficiency in which hormone?

Accepted Answer

Cortisol

Question 13

Which of the following best describes the fate of hemoglobin during erythrocyte destruction?

Accepted Answer

Hemoglobin is broken down into globin and heme; heme is further degraded to bilirubin.

Question 14

Which hormone is released by the anterior pituitary and stimulates the thyroid gland?

Accepted Answer

Thyroid-stimulating hormone (TSH)

Question 15

Which of the following best explains the difference between Type 1 and Type 2 diabetes mellitus?

Accepted Answer

Type 1 is caused by autoimmune destruction of pancreatic beta cells, while Type 2 is caused by insulin resistance.

Question 16

Which of the following equations correctly represents the calculation of mean arterial pressure (MAP)?

Accepted Answer

$	ext{MAP} = 	ext{Diastolic Pressure} + \frac{1}{3}(	ext{Systolic Pressure} - 	ext{Diastolic Pressure})$

Question 17

Which hormone is secreted by the pineal gland and regulates circadian rhythms?

Accepted Answer

Melatonin

Question 18

A patient with hyperthyroidism is most likely to exhibit which of the following symptoms?

Accepted Answer

Weight loss, heat intolerance, and tachycardia

Question 19

Which of the following best describes the function of antidiuretic hormone (ADH)?

Accepted Answer

ADH increases water reabsorption in the kidneys, reducing urine output.

Question 20

Which of the following is a correct statement about the transport of hydrophobic hormones in the blood?

Accepted Answer

Hydrophobic hormones are transported bound to plasma proteins.

BIO 142 Unit 1: Endocrine System and Blood – Structured Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards