Q: Which hormone produced by the kidneys stimulates red blood cell production, and what is the formula for calculating hematocrit percentage?

Erythropoietin; $$\text{Hematocrit} = \frac{\text{Volume of RBCs}}{\text{Total Blood Volume}} \times 100$$

Question 1

A patient presents with muscle weakness, bronze skin pigmentation, and increased susceptibility to infection. Laboratory tests reveal low secretion of adrenal cortex hormones. Which disorder is most likely affecting this patient?

Accepted Answer

Addison's Disease

Question 2

Which hormone is responsible for lowering blood calcium levels by depositing calcium into bone, and what is its antagonistic hormone?

Accepted Answer

Calcitonin; Parathyroid hormone

Question 3

A person with a diet deficient in iodine is at risk for developing which thyroid disorder, and what is the primary symptom?

Accepted Answer

Goiter; Enlarged thyroid

Question 4

During a stressful event, which hormone is released from the adrenal cortex to help resist long-term stress, and what is its effect on metabolism?

Accepted Answer

Cortisol; Increases metabolism

Question 5

Which hormone is secreted by the beta cells of the pancreatic islets and allows glucose to enter cells, thereby lowering blood sugar?

Accepted Answer

Insulin

Question 6

A patient with rapid heartbeat, weight loss, and bulging eyes is diagnosed with an autoimmune disorder affecting the thyroid gland. Which hormone is likely elevated, and what is the name of this disorder?

Accepted Answer

Thyroxine (T4); Graves' Disease

Question 7

Which hormone is released by the posterior pituitary and is responsible for stimulating uterine contractions and milk ejection during childbirth and breastfeeding?

Accepted Answer

Oxytocin

Question 8

If a person’s blood glucose level is measured at 150 mg/100 mL after a meal, which hormone will be secreted to restore homeostasis, and what is the target effect?

Accepted Answer

Insulin; Increase glucose uptake by cells

Question 9

Which hormone produced by the kidneys stimulates red blood cell production, and what is the formula for calculating hematocrit percentage?

Accepted Answer

Erythropoietin; $$	ext{Hematocrit} = \frac{	ext{Volume of RBCs}}{	ext{Total Blood Volume}} 	imes 100$$

Question 10

A patient with high blood pressure and edema is found to have excess secretion of aldosterone. Which organ is primarily affected, and what is the main function of aldosterone?

Accepted Answer

Kidneys; Regulates Na+ and K+ balance to control blood volume and pressure

Question 11

Which hormone is secreted by the pineal gland and regulates sleep-wake cycles? What is the effect of its secretion on the body?

Accepted Answer

Melatonin; Promotes sleepiness and regulates circadian rhythms

Question 12

A female patient is experiencing irregular menstrual cycles and difficulty with embryo implantation. Which hormone is most likely deficient, and what is its primary function?

Accepted Answer

Progesterone; Supports embryo implantation and regulates menstrual cycle

Question 13

Which hormone is released in response to ACTH from the pituitary and helps the body resist long-term stress?

Accepted Answer

Cortisol

Question 14

A patient with moon face, buffalo hump, and high blood sugar is diagnosed with a tumor causing excess cortisol production. What is the name of this syndrome?

Accepted Answer

Cushing's Syndrome

Question 15

Which hormone is secreted by alpha cells of the pancreas and stimulates the liver to release glucose, raising blood sugar levels?

Accepted Answer

Glucagon

Question 16

Which hormone is produced by the placenta during pregnancy and is detected by pregnancy tests?

Accepted Answer

Human Chorionic Gonadotropin (hCG)

Question 17

A patient is unable to concentrate urine and is constantly thirsty. Which hormone deficiency is most likely responsible, and what is its normal function?

Accepted Answer

ADH (Antidiuretic Hormone); Decreases urine output by increasing water reabsorption in kidneys

Question 18

Which hormone is released by the adrenal medulla during a 'fight-or-flight' response, and what are two of its physiological effects?

Accepted Answer

Epinephrine; Increases heart rate and dilates bronchioles

Question 19

Which hormone is secreted by the parathyroid glands and increases blood calcium levels by stimulating osteoclasts?

Accepted Answer

Parathyroid hormone (PTH)

Question 20

A male patient is experiencing delayed puberty and low sperm production. Which hormone is most likely deficient, and what is its primary function?

Accepted Answer

Testosterone; Develops male secondary traits and is required for sperm production

Chapter 9: The Endocrine System – Anatomy & Physiology Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards