Q: Which hormone increases bone resorption and raises blood calcium levels, and what is the equation for calcium homeostasis?

Parathyroid hormone; $$\Delta [Ca$$^{2+}$$] = +\text{bone resorption}$$

Question 1

Which sensory receptor in the skin is primarily responsible for detecting light touch, and where is it most abundantly found?

Accepted Answer

Meissner's corpuscle; dermal papillae

Question 2

Sebaceous glands secrete a substance that plays a crucial role in skin health. What is the name of this substance, and what is its primary function?

Accepted Answer

Sebum; lubricates and waterproofs the skin

Question 3

Arrange the layers of the epidermis from the most superficial to the deepest. Which sequence is correct?

Accepted Answer

Stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum basale

Question 4

Which part of a long bone is referred to as the shaft, and what is its primary structural function?

Accepted Answer

Diaphysis; provides support and leverage

Question 5

Compact bone and spongy bone differ in structure and function. Which statement accurately describes this difference?

Accepted Answer

Compact bone forms the outer layer and provides strength; spongy bone is found inside and absorbs shock

Question 6

The epiphyseal plate is crucial for bone lengthening during growth. What type of cartilage is found here, and what is the mechanism by which bone lengthens?

Accepted Answer

Hyaline cartilage; interstitial growth

Question 7

Which process describes the formation of flat bones such as those of the skull, and what is the main difference from endochondral ossification?

Accepted Answer

Intramembranous ossification; it does not involve a cartilage model

Question 8

Melanin production in the skin is a natural defense against UV radiation. Which cell type is responsible for melanin synthesis, and what is the effect of increased melanin?

Accepted Answer

Melanocyte; increased UV protection

Question 9

Which hormone increases bone resorption and raises blood calcium levels, and what is the equation for calcium homeostasis?

Accepted Answer

Parathyroid hormone; $$\Delta [Ca$$^{2+}$$] = +	ext{bone resorption}$$

Question 10

Which sweat gland is primarily responsible for thermoregulation, and what is the mechanism by which it cools the body?

Accepted Answer

Eccrine gland; releases watery sweat that evaporates to cool the skin

Question 11

Bone structure adapts to mechanical stress according to Wolff's Law. If a person begins weightlifting, what changes occur in their bone tissue?

Accepted Answer

Bone remodels and increases in density where stress is applied

Question 12

Cartilage grows by two mechanisms: interstitial and appositional growth. Which statement correctly describes these processes?

Accepted Answer

Appositional growth adds new layers to the surface; interstitial growth expands from within

Question 13

A patient suffers a second-degree burn. Which layers of the skin are affected, and what is a typical symptom?

Accepted Answer

Epidermis and dermis; blistering and pain

Question 14

Which type of cartilage is found in the meniscus of the knee, and what property does it provide?

Accepted Answer

Fibrocartilage; resistance to compression

Question 15

Sweat production is regulated by a negative feedback mechanism. If body temperature rises above normal, which sequence best describes the feedback loop?

Accepted Answer

Body temperature rises → sweat glands increase activity → evaporation cools skin → temperature returns to normal

Question 16

Which cell type in the epidermis acts as a phagocyte and is important for immune defense?

Accepted Answer

Dendritic (Langerhans) cell

Question 17

Which hormone is most directly involved in stimulating osteoblast activity and promoting bone formation?

Accepted Answer

Calcitonin

Question 18

Mammary glands are a modified type of which gland, and what is their primary function?

Accepted Answer

Sweat gland; produce milk for nourishment

Question 19

The knee joint is classified as which type of joint, and which bones are involved?

Accepted Answer

Hinge; femur and tibia

Question 20

During puberty, which statement best describes the difference in growth rates between males and females?

Accepted Answer

Males experience a later and longer growth spurt than females

Integumentary and Skeletal Systems: Structure, Function, and Regulation

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