Multiple Choice
synarthrotic joints:
a.) have large joint cavities
b.) are cartilaginous joints
c.) permit essentially no movement
c.) permit essentially no movement
In relationship to the diaphysis of a long bone, the osteons are
a.) radial
b.) anterior
c.) proximal
d.) parallel
d.) parallel!!!
The repeating unit of a skeletal muscle fiber is the
sarcomere!!
True or False :
The epidermis of our skin is comprised of keratinized simple squamous epithelium
Fasle!
Keratinized stratified squamous epithelium
We are told that every surface we touch is teeming with bacteria, and bacteria are found in pools we swim in, the water we wash with, and on the hands of friends. Explain 3 different mechanisms or features of our integument that help defend us from being inundated with bacterial infections.
* Sebum
*Sweat
*Keratinized cells
*Epidermal cells closely together
Which of the following labels best matches osteocyte?
a.) stem cell
b.) dissolves matrix
c.) mature bone cell
d.) secretes organic matrix
c.) mature bone cell!!!
The layer of skin that contains the blood vessels and nerves that are closest to the surface of the skin is the ____ layer.
a.) reticular
b.) papillary
c.) stratum basale
d.) both a and b
b.) Papillary!!
This is a hard protein produced by keratinocytes
Keratin!!!
True or False :
Stimulating osteoclasts would indirectly lead to an increase in blood calcium
True!!
Considering both form and function, propose a reason why the incidence rates of osteoporosis are higher in far northern climates.
-Less sunlight
-Less vitamin D, a decrease in calcium absorption
-With less calcium, bones become weaker
Glands that discharge an oily secretion into hair follicles are _____ glands.
a.) Apocrine sweat
b.) Merocrine sweat
c.) Mammary
d.) Sebaceous
d.) Sebaceous
The terms inversion and eversion pertain only to the ________.
a.) hands
b.) feet
c.) arms
d.) hands and the feet
b.) Feet
What is moving a limb away from the median plane of the body along the frontal plane called?
Abduction!
True or False:
The shape of articulation influences the stability
True!!!!
as well as # of ligaments and muscle tone around joint
While fingers can exhibit flexion and extension, and other angular movements, the thumb has much greater freedom. Why?
The thumb has greater freedom because it is a saddle joint unlike the rest of the other phalanges; this allows a movement called opposition which allows grasping.
15) The region of a long bone between the end and the shaft is known as the
a.) diaphysis.
b.) epiphysis.
c.) osseophysis.
d.) metaphysis.
d.) metaphysis!!
A fascicle is a
a.) group of muscle fibers that are encased in the perimysium.
b.) layer of connective tissue that separates muscle from skin.
c.) group of muscle fibers that are all part of the same motor unit.
d.) group of muscle fibers and motor neurons.
e.) collection of myofibrils in a muscle fiber
a.) group of muscle fibers that are encased in the perimysium
The lacunae of osseous tissue contain ____
Osteocytes!!
True or False:
The plasma membrane of a skeletal muscle fiber is called the sarcoplasm
False
The sarcolemma is the plasma membrane of skeletal muscle fiber
Explain as specifically as possible 4 unique joint movements involved in eating a meal!
Elevation, depression, retraction, and protraction
Put the following structures in order from superficial to deep. 1. muscle fiber 2. perimysium 3. myofibril 4. fascicle 5. endomysium 6. epimysium
a.) 1, 5, 4, 3, 2, 6
b.) 6, 2, 5, 4, 1, 3
c.)6, 2, 4, 5, 1, 3
d.) 1, 3, 5, 6, 4, 2
e.) 2, 3, 1, 4, 6, 5
c.) 6, 2, 5, 1, 3
If the papilla of the hair follicle is destroyed,
a.) The hair matrix will lose its blood supply
b.) The texture of the hair will become coarser c .) The color of the hair will become lighter
d.) Hair production will not be affected
a.) The hair matrix will lose its blood supply!
absorption of calcium!!
True or False
Calcium phosphate makes up 2/3s of the bone matrix
True!
Todd is 13 and lives in an urban apartment. He spends most of his time watching TV and eating "junk" food. One afternoon, during recess, he falls on the playground and breaks his leg. Although he appears to be healthy, his leg takes longer to heal than expected. What might be the cause of the longer healing time?
Todd's problem is probably related to his poor diet.
Insufficient quantities of protein, vitamin C, vitamin A, and vitamin D would cause the normal healing process to occur at a much slower rate.
Todd's inactivity may also contribute to his slower rate of healing.