1- What determines tissue function within an organ? structure of the organ syste
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Question
1- What determines tissue function within an organ?
structure of the organ system
the presence/absence of blood vessels
function of the organ containing such tissues
organelle composition of the tissue cells
2- Carbon dioxide gas (CO2) is a waste product made by cells that must be removed from the cell. Which of the following would improve removal of CO2 out of a cell? (CO2 has the same solubility in the membrane as oxygen.)
Decreasing the cell membrane’s surface area
Decreasing the concentration of CO2 outside of the cell
Increasing the number of membrane transport proteins for CO2
Increasing the number of cilia on the cell
3- Breast milk is a fatty, protein rich secretion produced by the mammary glands.Which of the following best describes the mammary gland tissue that produces breast milk?
The cells are squamous in shape with ribosomes, microvilli and nuclei
The cells are cuboidal in shape and contain rough ER, smooth ER and golgi apparatus
The cells are fibroblasts supported by collagen, reticular and elastic fibers
The cells are adipocytes embedded in an extracellular matrix
4- Mature red blood cells (RBCs) do not have nuclei or mitochondria, although they have many cytoplasmic proteins that bind oxygen. With this information, what must also be TRUE about red blood cells?
The immature RBCs had a nucleus and ribosomes
The mature RBCs cannot make ATP
The mature RBCs have many rough ER
The immature RBCs had cilia and smooth ER
5- Ground substance:
is not found in bone.
is intracellular.
includes collagen, reticular and elastic fibers.
contains dissolved proteins.
6-
While working with a histologist, you are asked to look through the microscope and identify an avascular tissue that contains some cells, widely spaced apart. There are also many fibers of varying thickness between the cells. What is the tissue you are viewing?
A connective tissue
An epithelium
Muscle tissue
Neural tissue
7-
8.
Which of the following represents the lowest level of organization?
Collagen
Osteocyte
Femur
Trabeculae
Articular cartilage
8-
White blood cells destroy virus infected cells by inserting non-selective holes into the membrane. This is an effective means of cellular destruction because once attacked by the white blood cell, the virus infected cell will not be able to:
regulate fat transport across the membrane
maintain internal ionic composition
export proteins
make ATP
9-
Chondrocytes make the collagen fibers.
a. True
b. False
10-
A certain disease/disorder has the following symptoms: frequently dislocated joints, overly loose skin and poorly mineralized bone. Which of the following would most likely cause all the described symptoms, but not other symptoms?
Inability to produce fluid connective tissue properly
Inability to produce ATP
Inability to produce collagen properly
Inability to produce desmosomes properly
11-
During endochondral bone formation, chondrocytes become osteoblasts.
a. True
b. False
12- As long bones grow longer, removal by the endosteum and deposition at the periosteum widens bones.
a. True
b. False
13- After the age of 18 years in women or 21 years in men (roughly), long bones cannot grow wider or longer.
a. True
b. False
Explanation / Answer
1. organelle composition of the tissue cells
Though each cell is unique in its composition, their organelle performance varies from organ to organ. For example, a cardiac cell or skeletal muscle cell contains more mitochondria, whereas red blood cells do not contain mitochondria.
2. Decreasing the concentration of CO2 outside of the cell.
If the concentration of CO2 outside the mebrane is low, more CO2 can diffuse out (can be removed from the cell).
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