EXAM 2 BIO 40 2026 Exam
Questions and Correct
Answers | New Update
How does the epidermis protect the body from dehydration, and what
specific structure plays a key role in its function? - ANSWER ✔✔By
producing keratin; the stratum corneum forms a tough, water-resistant
layer
A patient presents with a mole that has irregular borders and multiple
shades of brown and black. According to the ABCDE rule for detecting
skin cancer, which two letters are most likely concerning, and why? -
ANSWER ✔✔C & E; the mole is changing color and evolving shape
In response to UV radiation, the skin initiates a process that ultimately
regulates calcium levels in the body. What is the correct sequence of
, events, and how does this process affect calcium absorption? -
ANSWER ✔✔UV radiation triggers the formation of cholecalciferol in
the skin, which is converted to calcitriol in the kidneys, enhancing
calcium absorption from the intestines.
Skin glands are classified based on their secretion methods, each
involving a unique cellular process. Which type of gland releases its
secretion by the complete disintegration of its cells, and how does this
process compare to the mechanisms of other skin glands? -
ANSWER ✔✔Holocrine glands: they release their secretions by
rupturing the entire cell, unlike merocrine glands which use exocytosis
and apocrine glands that lose part of the cytoplasm.
Which part of a long bone is responsible for the lengthwise growth
during childhood, and what happens to this structure in adulthood? -
ANSWER ✔✔The epiphyseal plate: it becomes the epiphyseal line
when growth stops.
.............gives bone its compressional strength, and .............. gives bone
its tensile strength - ANSWER ✔✔hydroxyapatite; collagen
Which of the following activity is associated with osteoclast resorption of
bone? - ANSWER ✔✔Blood calcium is increased
Questions and Correct
Answers | New Update
How does the epidermis protect the body from dehydration, and what
specific structure plays a key role in its function? - ANSWER ✔✔By
producing keratin; the stratum corneum forms a tough, water-resistant
layer
A patient presents with a mole that has irregular borders and multiple
shades of brown and black. According to the ABCDE rule for detecting
skin cancer, which two letters are most likely concerning, and why? -
ANSWER ✔✔C & E; the mole is changing color and evolving shape
In response to UV radiation, the skin initiates a process that ultimately
regulates calcium levels in the body. What is the correct sequence of
, events, and how does this process affect calcium absorption? -
ANSWER ✔✔UV radiation triggers the formation of cholecalciferol in
the skin, which is converted to calcitriol in the kidneys, enhancing
calcium absorption from the intestines.
Skin glands are classified based on their secretion methods, each
involving a unique cellular process. Which type of gland releases its
secretion by the complete disintegration of its cells, and how does this
process compare to the mechanisms of other skin glands? -
ANSWER ✔✔Holocrine glands: they release their secretions by
rupturing the entire cell, unlike merocrine glands which use exocytosis
and apocrine glands that lose part of the cytoplasm.
Which part of a long bone is responsible for the lengthwise growth
during childhood, and what happens to this structure in adulthood? -
ANSWER ✔✔The epiphyseal plate: it becomes the epiphyseal line
when growth stops.
.............gives bone its compressional strength, and .............. gives bone
its tensile strength - ANSWER ✔✔hydroxyapatite; collagen
Which of the following activity is associated with osteoclast resorption of
bone? - ANSWER ✔✔Blood calcium is increased
