A&P Test 3 Flashcards

Which of the following pairs is MISMATCHED? (Select all that apply)

Which of the following hormones is currently thought to decrease plasma calcium levels in pregnant women and children?

PTH promotes the formation of which hormone?

Which of the following would NOT be a way that parathyroid hormone (PTH) could alter plasma calcium levels? (Which one of the following is FALSE?)

Which hormone works directly in the intestine to increase plasma calcium levels?

Bone Classification

Tarsals are classified as short bones.
Skull bones fall under the category of flat bones.
The sternum is identified as a flat bone, not a long bone.
The femur is accurately categorized as a long bone.

Hormonal Regulation of Calcium

Calcitonin is believed to decrease plasma calcium levels, especially in pregnant women and children.
Parathyroid hormone (PTH) plays a key role in regulating calcium levels, promoting the formation of calcitriol, which is the active form of Vitamin D.

Effects of Parathyroid Hormone (PTH)

PTH does NOT increase the activity of osteoblasts (cells that build bone); instead, it primarily targets osteoclasts (cells that break down bone).
PTH increases renal reabsorption of calcium, helping to elevate plasma calcium levels.
PTH indirectly increases intestinal calcium absorption by activating Vitamin D into calcitriol in the kidneys.

Intestinal Calcium Absorption

Parathyroid hormone (PTH) enhances calcium absorption in the intestine through its effects on Vitamin D.

Test your knowledge with these flashcards for Anatomy and Physiology Test 3. Each question focuses on key concepts such as bone types and hormonal functions related to calcium levels. Perfect for students preparing for exams.