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BIO 446L Final Exam Questions and 100% Correct Answers
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All the following statements about the plasmalemma of a cell are true EXCEPT one. The EXCEPTION is: a. Has cholesterol in the middle layer b. May have lipid rafts c. Has integral proteins that form a loose association with one of the two membrane surfaces. d. The external surface of the plasma mem...

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  • August 17, 2024
  • 7
  • 2024/2025
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  • Questions & answers

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  • bio 446l final exam questions and 100 correct ans
  • all the following statements about the plasmalemma
  • a has cholesterol in the middle layer b may have

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BIO 446L Final Exam Questions and
100% Correct Answers
All the following statements about the plasmalemma of a cell are true EXCEPT one.
The EXCEPTION is:

a. Has cholesterol in the middle layer
b. May have lipid rafts
c. Has integral proteins that form a loose association with one of the two membrane
surfaces.
d. The external surface of the plasma membrane is hydrophilic
e. The internal surface of the plasma membrane is hydrophilic ✅c. Has integral
proteins that form a loose association with one of the two membrane surfaces

The mechanism by which extracellular fluid is brought into a cell is called ✅Pinocytosis

The network of microfilaments that form a framework within a microvillus is formed by
✅Actin

What organelle of the cell would be present in large numbers in cells requiring large
amounts of energy? ✅Mitochondria

If a biopsy found malignant cells in an epithelium, the abnormal cell proliferation would
be indicated by an increase in size and/or number of which of the following structures
within the cells examined? ✅Nucleolus

The type of intercellular junction located adjacent to the apical surface of an epithelial
cell used to seal off the intercellular space from the outside space is a: ✅Zonula
Occludens

The cells that line the acinar portion of a gland are most likely to be classified as:
✅Cuboidal epithelial

The basal lamina is composed of glycoproteins (laminin and entactin) and ✅Type IV
collagen

The free surface specializations of epithelial cells in the bronchi that move mucus are
called ✅Cilia

The process by which a leukocyte migrates from a blood vessel into the connective
tissue is called: ✅Diapedesis

The connective tissue fiber with the greatest tensile strength is the ✅Collagen fiber

, The ground substance of connective tissue is rich in heavily hydrated
glycosaminoglycans, proteoglycans and multiadhesive glycoproteins. An example of a
proteoglycan found in the cartilage is: ✅Aggrecan

The type of adipose tissue that has adipocytes with a single lipid drop and a nucleus
displaced to the plasma membrane is ✅White adipose

The hormone secreted by adipocytes that binds to receptors in the brain indicating
satiety is: ✅Leptin

Hyaline cartilage is composed of an extracelluar matrix that contains which type of
collagen? ✅Type II collagen

Growth and repair of hyaline cartilage is limited because its: ✅Avascular

Resistance to both compression and shear force is best met via ✅Fibrocartilage

All the following statements about an osteon are true EXCEPT ONE. Which statement
is the EXCEPTION?

a. It has a central canal with blood vessels and nerve.
b. It has concentric lamellae.
c. It has osteocytes isolated within the bone
d. It communicates with other osteons as well as the periosteum by perforating canals
✅c. It has osteocytes isolated within the bone

A long bone has both an endosteum and periosteum. All of the following statements
about these two structures are true EXCEPT ONE.
A. All collagen fibers in the periosteum are arranged parallel to the surface of the bone
B. Appositional bone growth occurs from osteoblasts located in the endosteum and
periosteum
C. The periosteum has a fibrous outer layer
D. The periosteum has an inner layer of progenitor cells and osteoblasts ✅A. all
collagen fibers in the periosteum are arranged parallel to the surface of the bone

During intramembranous bone formation: ✅Mesenchymal cells first differentiate into
osteoblasts that secrete osteoid

Which of the following glial cells are normally located near blood vessels and act to
support neurons? ✅Astrocytes

During the flexion of the biceps muscle the sarcomeres of the muscle shorten. Which of
the following structures are attached to the Z-line during this process? ✅Actin
myofilaments

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