Q: Which equation best represents the negative feedback loop involved in bone remodeling in response to low blood calcium levels?

When $$Ca^{2+}$$ levels drop: $$\text{Parathyroid hormone} \rightarrow \text{Osteoclast activity} \uparrow \rightarrow \text{Bone resorption} \uparrow \rightarrow \text{Blood } Ca$$^{2+}$$ \uparrow$$

Q: Which equation best represents the relationship between bone mass and mechanical stress, according to Wolff's Law?

$$\text{Bone mass} \propto \text{Mechanical stress}$$

Question 1

Which of the following best describes the chief function of simple squamous epithelium, and where is it most commonly found?

Accepted Answer

Diffusion and filtration; lining blood vessels and alveoli of lungs

Question 2

Which of the following is NOT a special characteristic of epithelial tissue?

Accepted Answer

Abundant extracellular matrix

Question 3

A patient presents with yellowing of the skin and eyes. Which condition is most likely responsible for this change in skin color?

Accepted Answer

Jaundice

Question 4

Which connective tissue fiber provides high tensile strength and is most abundant in tendons?

Accepted Answer

Collagen fibers

Question 5

Which equation best represents the negative feedback loop involved in bone remodeling in response to low blood calcium levels?

Accepted Answer

When $$Ca^{2+}$$ levels drop: $$	ext{Parathyroid hormone} ightarrow 	ext{Osteoclast activity} \uparrow ightarrow 	ext{Bone resorption} \uparrow ightarrow 	ext{Blood } Ca$$^{2+}$$ \uparrow$$

Question 6

Which of the following best describes the difference between exocrine and endocrine glands?

Accepted Answer

Exocrine glands secrete products onto body surfaces or into cavities; endocrine glands secrete hormones directly into the bloodstream.

Question 7

A burn patient is diagnosed with a third-degree burn. Which of the following best describes the characteristics and treatment of this burn?

Accepted Answer

Entire thickness of skin is damaged; treatment often requires skin grafting and fluid replacement.

Question 8

Which connective tissue cell type is primarily responsible for producing the fibers and ground substance in connective tissue proper?

Accepted Answer

Fibroblasts

Question 9

Which membrane lines body cavities that are open to the exterior, such as the digestive and respiratory tracts?

Accepted Answer

Mucous membrane

Question 10

Which layer of the epidermis is responsible for the production of new keratinocytes and contains actively dividing cells?

Accepted Answer

Stratum basale

Question 11

Which of the following best describes the composition and function of yellow bone marrow?

Accepted Answer

Contains adipose tissue; stores fat

Question 12

Which equation best represents the relationship between bone mass and mechanical stress, according to Wolff's Law?

Accepted Answer

$$	ext{Bone mass} \propto 	ext{Mechanical stress}$$

Question 13

Which of the following is a function of the periosteum?

Accepted Answer

Serves as a site for ligament and tendon attachment and contains osteogenic cells

Question 14

Which of the following best describes the difference between loose and dense connective tissue?

Accepted Answer

Dense connective tissue has more fibers and less ground substance than loose connective tissue.

Question 15

Which of the following is a chief function of hyaline cartilage, and where is it commonly found?

Accepted Answer

Supports and reinforces; ends of long bones, nose, trachea

Question 16

A patient with osteoporosis is at increased risk for fractures due to a decrease in which component of bone?

Accepted Answer

Inorganic matrix (hydroxyapatite crystals)

Question 17

Which of the following best describes the function of melanocytes in the epidermis?

Accepted Answer

Produce melanin to protect against UV radiation

Question 18

Which equation best represents the process of endochondral ossification during bone growth?

Accepted Answer

$$	ext{Cartilage model} ightarrow 	ext{Bone formation} ightarrow 	ext{Epiphyseal plate closure}$$

Question 19

Which of the following best describes the chief function of reticular fibers in connective tissue?

Accepted Answer

Form supportive networks in soft tissues like lymph nodes and spleen

Question 20

A patient is diagnosed with basal cell carcinoma. Which of the following best describes this skin cancer?

Accepted Answer

Originates in the stratum basale; slow-growing and rarely metastasizes

Anatomy & Physiology I: Study Guide for Tissues, Integumentary System, and Skeletal System

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