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