ASU BIO202 Anatomy Physiology II Exam 1 Practice Exam Complete 100Q

ASU BIO202 ANATOMY

PHYSIOLOGY II EXAM 1

PRACTICE EXAM

COMPLETE 100Q

Question 1: A hormone can a�ect a particular cell only if that cell has what feature?

Choices:

1) A speci�c receptor for the hormone 2) A myelin sheath 3) A high concentration of hemoglobin 4) A basement membrane

Correct Answer: A speci�c receptor for the hormone

Explanation: Target cells respond to a hormone because they express receptors that speci�cally bind that hormone.Page 1

Question 2: Which statement best distinguishes endocrine glands from exocrine

glands?

Choices:

1) Endocrine glands secrete through ducts 2) Endocrine glands release hormones into interstitial �uid and blood 3) Exocrine glands lack epithelial tissue 4) Exocrine glands release only enzymes Correct Answer: Endocrine glands release hormones into interstitial �uid and blood Explanation: Endocrine glands are ductless and release hormones into interstitial �uid for transport in the bloodstream; exocrine glands secrete through ducts.

Question 3: A peptide hormone binds to a receptor on the plasma membrane. What

is the most likely next event?

Choices:

1) The hormone directly binds DNA 2) A second-messenger pathway is activated 3) The hormone enters the nucleus unchanged 4) The hormone becomes a steroid

Correct Answer: A second-messenger pathway is activated

Explanation: Most peptide hormones are water soluble and signal through membrane receptors that activate intracellular second messengers.Page 2

Question 4: Which hormone is most likely to cross the plasma membrane and bind

an intracellular receptor?

Choices:

1) Insulin 2) Epinephrine 3) Cortisol 4) Antidiuretic hormone

Correct Answer: Cortisol

Explanation: Cortisol is a steroid hormone. Steroid hormones are lipid soluble and typically bind cytoplasmic or nuclear receptors.Question 5: In a negative-feedback endocrine loop, rising levels of the �nal hormone usually do what?

Choices:

1) Stimulate further release of upstream hormones 2) Inhibit release of one or more upstream hormones 3) Destroy target-cell receptors immediately 4) Convert the pathway to neural signaling

Correct Answer: Inhibit release of one or more upstream hormones

Explanation: Negative feedback stabilizes hormone levels by reducing upstream stimulation when the �nal hormone concentration rises.Page 3