Questions & Answers with Detailed Rationales |
Grade A
SUBTITLE:
60 Exam Questions with Answers & Detailed Rationales
PREPARED FOR:
BIOD 152 Essential Human Anatomy and Physiology II - Portage Learning Final Exam
DOCUMENT INCLUDES:
● Exam-style questions
● Correct answers
● Detailed rationales
● Key topics covered
TOPICS COVERED:
● Endocrine System & Hormonal Regulation
● Blood & Hematology
● Cardiovascular System (Heart, Vessels, Circulation)
● Lymphatic System & Immunity
● Respiratory System
● Digestive System & Nutrition
● Urinary System & Fluid/Electrolyte Balance
● Acid-Base Balance
● Reproductive System & Human Development
PURPOSE:
This comprehensive final exam prep guide is designed to help BIOD 152 students
master essential anatomy and physiology concepts, reinforce understanding of body
systems, and confidently prepare for the Portage Learning Final Examination.
,SECTION 1: ENDOCRINE SYSTEM & HORMONAL REGULATION
Question 1
Which of the following hormones is synthesized by the hypothalamus and stored in the
posterior pituitary gland?
A. Growth hormone (GH)
B. Antidiuretic hormone (ADH)
C. Adrenocorticotropic hormone (ACTH)
D. Thyroid-stimulating hormone (TSH)
Correct Answer: B
Rationale: Antidiuretic hormone (ADH) and oxytocin are synthesized by neurosecretory
cells in the hypothalamus and transported down axons to the posterior pituitary, where
they are stored and released. Growth hormone, ACTH, and TSH are all synthesized and
secreted by the anterior pituitary gland, not stored in the posterior pituitary.
Question 2
A patient presents with excessive thirst, frequent urination, and dilute urine. Laboratory
tests reveal low ADH levels. Which condition is most likely present?
A. Diabetes mellitus
B. Diabetes insipidus
C. Cushing syndrome
D. Hyperthyroidism
Correct Answer: B
Rationale: Diabetes insipidus results from insufficient ADH production or action, leading
to the inability to concentrate urine, causing polyuria and polydipsia. Diabetes mellitus
involves insulin deficiency and elevated blood glucose. Cushing syndrome results from
,excessive cortisol. Hyperthyroidism involves excessive thyroid hormone production and
does not primarily affect water balance.
Question 3
Which hormone is the primary regulator of blood calcium levels when calcium is
elevated?
A. Parathyroid hormone (PTH)
B. Calcitonin
C. Vitamin D
D. Aldosterone
Correct Answer: B
Rationale: Calcitonin, secreted by the parafollicular cells (C cells) of the thyroid gland, is
released when blood calcium levels are high and acts to lower calcium by inhibiting
osteoclast activity and increasing calcium excretion by the kidneys. PTH raises blood
calcium when levels are low. Vitamin D increases calcium absorption. Aldosterone
regulates sodium and potassium balance, not calcium.
Question 4
Which of the following is a glucocorticoid produced by the adrenal cortex?
A. Aldosterone
B. Cortisol
C. Epinephrine
D. Norepinephrine
Correct Answer: B
Rationale: Cortisol is the primary glucocorticoid produced by the zona fasciculata of the
adrenal cortex. It regulates glucose metabolism, immune response, and stress
, adaptation. Aldosterone is a mineralocorticoid. Epinephrine and norepinephrine are
catecholamines produced by the adrenal medulla.
Question 5
Graves disease is an autoimmune disorder characterized by the production of
antibodies that mimic TSH. Which clinical finding is most consistent with this
condition?
A. Bradycardia and weight gain
B. Exophthalmos and heat intolerance
C. Hypoglycemia and hypotension
D. Dry skin and cold intolerance
Correct Answer: B
Rationale: Graves disease causes hyperthyroidism due to thyroid-stimulating
immunoglobulins (TSI) that activate thyroid hormone production. Clinical
manifestations include exophthalmos (bulging eyes), heat intolerance, tachycardia,
weight loss, and increased metabolic rate. Bradycardia, weight gain, dry skin, and cold
intolerance are characteristic of hypothyroidism.
Question 6
Which endocrine gland is primarily responsible for the body's circadian rhythm
regulation through melatonin secretion?
A. Thyroid gland
B. Pineal gland
C. Thymus
D. Pancreas
Correct Answer: B