exam 2 review Flashcards
(47 cards)
Pinocytosis is the process in which the cell
internalizes (“drinks”) a droplet of interstitial fluid.
The release of neurotransmitter from a neuron is an example of
exocytosis and it requires expenditure of ATP.
If the nutrient glycogen is found stored inside a cell, it is considered a(n)
inclusion.
The phase of mitosis that begins with the arrival of a group of single-stranded chromosomes at each pole of the cell is
telophase.
Which statement is accurate?
A sequence of nucleotides in DNA constitutes a gene; DNA and associated proteins form chromatin.
Mucus is moved along the lining of the trachea by extensions from cell membranes known as
cilia.
What feature of your ear accounts for its ability to regain its shape after it has been deformed or compressed?
The elastic fibers present in the ear’s cartilage
What type of epithelium would be most suited for high levels of diffusion and filtration?
Simple squamous
If a gland secretes its products through a duct to the surface of the small intestine epithelium, it must be an
exocrine gland.
Ligaments are very strong but resistant to stretch. Which protein fiber probably predominates?
Collagen
Suppose that you were involved in an automobile accident and suffered a back injury. When examined by your physician you are told that you have a slipped disc in the lower back. What type of tissue is involved?
Fibrocartilage
What unit of bone consists of a central canal (containing blood vessels, nerves, and lymph vessels) surrounded by concentric rings of calcified matrix?
Osteon
Pseudostratified ciliated columnar epithelium is found lining
portions of the respiratory system.
Why might someone pale when they are exposed to a cold temperature?
Vasoconstriction has occurred
Cerumen is a secretion that
lubricates the ear canal and traps debris before it reaches the eardrum
The deeper sublayer of the dermis is the ________ layer, and it is the _______ of the two.
reticular, thicker
The reticular layer of the dermis consists primarily of
dense irregular connective tissue.
Which statement is true regarding the subcutaneous layer (hypodermis)?
It stabilizes the position of the skin and binds it to underlying structures.
The type of gland that secretes sweat into a hair follicle that is found in the axillary, anal, and genital regions is the ________ sweat gland.
apocrine
The pigment melanin is a(n)
inclusion.
Some of the largest spherical cells in the human body (for example, oocytes) have a diameter of approximately
100 μm.
Glycolipids are found on the
outer layer of the cell membrane, and they help make the sticky sugar coating on its surface.
Consider a cell with a total internal solute concentration of 0.9%. Placing the cell in which bath solution would result in creation of the greatest osmotic pressure in the cell?
0.5% NaCl
Which are the smallest components of the cytoskeleton?
Microfilaments
