Exam 5: Lecture 63: Hormones Synthesis: AI Questions

Question 1

Which of the following best describes the primary function of the endocrine system?
A) Regulation of immune responses
B) Maintaining homeostasis
C) Digestive enzyme production
D) Blood clotting

Answer 1

B

Question 2

Which hormone type is synthesized from cholesterol?
A) Peptide hormone
B) Steroid hormone
C) Catecholamine
D) Eicosanoid

Answer 2

B

Question 3

Peptide hormones are initially synthesized as:
A) Preprohormones
B) Active hormones
C) Steroids
D) Tyrosine derivatives

Answer 3

A

Question 4

Which feedback mechanism is most common in regulating hormone secretion?
A) Positive feedback
B) Negative feedback
C) Neutral feedback
D) Allosteric feedback

Answer 4

B

Question 5

A hormone that exerts effects on the same cell that secretes it is classified as:
A) Paracrine
B) Autocrine
C) Neurocrine
D) Endocrine

Answer 5

B

Question 6

Catecholamines are derived from which amino acid?
A) Tryptophan
B) Tyrosine
C) Glutamine
D) Glycine

Answer 6

B

Question 7

Which hormone storage form is associated with thyroid hormones?
A) Thyroglobulin
B) Albumin
C) Transferrin
D) Hemoglobin

Answer 7

A

Question 8

What is the primary difference between peptide and steroid hormones in terms of action?
A) Peptide hormones are lipid-soluble
B) Steroid hormones bind to cell surface receptors
C) Steroid hormones act on intracellular receptors
D) Peptide hormones are stored in vesicles as active forms

Answer 8

C

Question 9

Which of the following hormones is stored in the adrenal medulla and released upon stimulation?
A) Insulin
B) Epinephrine
C) Cortisol
D) Thyroxine

Answer 9

B

Question 10

The feedback loop where the hypothalamic hormone inhibits its own release is known as:
A) Long feedback loop
B) Short feedback loop
C) Ultra-short feedback loop
D) Positive feedback loop

Answer 10

C

Question 11

Steroid hormones are synthesized from:
A) Fatty acids
B) Amino acids
C) Cholesterol
D) Carbohydrates

Answer 11

C

Question 12

Which of the following hormones is an example of a peptide hormone?
A) Cortisol
B) Insulin
C) Thyroxine
D) Prostaglandin

Answer 12

B

Question 13

A characteristic of homeostasis is:
A) Static equilibrium
B) Dynamic equilibrium
C) Positive feedback regulation
D) Increased variability

Answer 13

B

Question 14

What type of hormone signaling involves secretion into the bloodstream and long-distance travel?
A) Paracrine
B) Neurocrine
C) Endocrine
D) Autocrine

Answer 14

C

Question 15

Which of the following is a key feature of positive feedback mechanisms?
A) Inhibition of hormone release
B) Stabilizing effect on the variable
C) Amplification of the original stimulus
D) Decreased hormone sensitivity

Answer 15

C

Question 16

The primary purpose of a control center in a feedback loop is to:
A) Detect changes in the environment
B) Execute the response
C) Integrate and process information
D) Act as an effector

Answer 16

C

Question 17

Which of the following is an example of a hormone exerting its effects via a paracrine signaling pathway?
A) Insulin acting on liver cells
B) Estrogen affecting ovarian follicle cells
C) Epinephrine circulating in the blood
D) Prostaglandins affecting nearby tissue cells

Answer 17

D

Question 18

Which hormone is regulated by a negative feedback loop involving blood glucose levels?
A) Cortisol
B) Insulin
C) Oxytocin
D) Thyroxine

Answer 18

B

Question 19

Where are peptide hormones typically stored before secretion?
A) Mitochondria
B) Secretory granules
C) Endoplasmic reticulum
D) Nucleus

Answer 19

B

Question 20

The hormone oxytocin is best known for its role in:
A) Regulating blood pressure
B) Stimulating uterine contractions
C) Increasing blood glucose levels
D) Suppressing immune function

Answer 20

B

Question 21

Which hormone type usually requires binding to a carrier protein in the bloodstream?
A) Peptide hormones
B) Steroid hormones
C) Catecholamines
D) Eicosanoids

Answer 21

B

Question 22

Which is an example of a neurocrine hormone?
A) Insulin
B) Norepinephrine
C) Aldosterone
D) Prolactin

Answer 22

B

Question 23

Prostaglandins are derived from:
A) Amino acids
B) Tyrosine
C) Arachidonic acid
D) Cholesterol

Answer 23

C

Question 24

Which hormone has a positive feedback mechanism during parturition?
A) Prolactin
B) Oxytocin
C) Insulin
D) Epinephrine

Answer 24

B

Question 25

The primary storage form of thyroid hormones is:
A) Free thyroxine
B) Bound to albumin
C) Thyroglobulin in follicles
D) Transferrin

Answer 25

C

Question 26

Which of the following is NOT typically a feature of peptide hormones?
A) Water-soluble
B) Stored in secretory vesicles
C) Act via intracellular receptors
D) Synthesized as preprohormones

Answer 26

C

Question 27

Which feedback loop involves the target organ hormone inhibiting the release of the pituitary hormone?
A) Ultra-short feedback loop
B) Short feedback loop
C) Long feedback loop
D) Positive feedback loop

Answer 27

C

Question 28

The synthesis of thyroid hormones requires:
A) Glucose
B) Iodine
C) Calcium
D) Potassium

Answer 28

B

Question 29

Which of the following is an example of an endocrine hormone?
A) Growth factors
B) Prostaglandins
C) Aldosterone
D) Acetylcholine

Answer 29

C

Question 30

Which class of hormones is typically synthesized on demand rather than stored?
A) Peptide hormones
B) Catecholamines
C) Steroid hormones
D) Protein hormones

Answer 30

C