Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
Which types of muscles are uninucleated?
|
Smooth muscles
|
|
|
Which type of muscles are multinucleated?
|
Cardiac muscle, and skeletal musle
|
|
|
What types of muscles are striations found on?
|
Cardiac an skeletal muscle, but NOT smooth
|
|
|
What is unique about cardiac muscle and what does this feature do for the muscle?
|
Has intercalated discs, the plasma membranes at intercalated disks contain gap junctions that permit contractions to spread quickly in other words, your atria and ventricles contract as if they were one cell.
|
|
|
A whole muscle contains bundles of skeletal muscle fibers called what?
|
fascicles
|
|
|
What are small fluid-filled sacs that can be inflamed found between tendons and bones?
|
Bursa
|
|
|
What was Kayla Scott diagnosed with, what was the treatment? Why? What could happen if she didn't take care of it?
|
tendonitis which led to bursitis, start with corisone shot to reduce swelling and ibuprofin and naproxen for pain, if not bursitis can develop scar tissue and you can permanently lose movement.
|
|
|
What is a motor unit?
|
The nerve fiber, together with all of the muscle fibers it innervates
|
|
|
The fewer the muscle fibers in a motor unit, the ...?
|
More the motor unit is precise
|
|
|
The more muscle fibers, the....?
|
strength of the muscle.
|
|
|
What is a muscle twitch? What can it be measured by, and what is the graph of muscle activity after an electrical stimulus called?
|
When a motor unit is stimulated by infrequent electrical impulses. Physiograph, myogram
|
|
|
What are the 2 stages a muscle twitch is customarily divided into? What happens during these 3 phases?
|
1. Latent period: period of time between stimulation and initiation of contraction
2. Contraction Period: Calcium is released into the cytoplasm of the muscle fiber and the small filaments in the cytoplasm slide past each other. 3. Relaxation Period: Calcium is removed from teh cytoplasm of the muscle fiber, and the small filaments in the cytoplasm slide back to their resting positions |
|
|
What happens if a motor unit is given a rapid series of stimuli?
|
IT can respond to the next stimulus without relaxating completely
|
|
|
What is increased muscle contraction until mzximal sustained contraction is achieved, what is this called?
|
summation or tetanus
|
|
|
What causes tetanus? Is this the same thing? What is tetanus?
|
clostridium tetani, and death occurs because the muscles, including the respirator muscles, become fully contracted and do not relax.
|
|
|
What happens as the intensity of nervous stimulation increases? what is the key word for this phenomenon
|
more and more motro units in a muscle are activated and "recruitment" occurs
|
|
|
What would the max contraction of a muscle require?
|
All motor units undergoing tetanic contraction
|
|
|
what is muscle tone dependent on?
|
muscle contraction
|
|
|
What maintains muscle tone? Where is this thing found?, what do these things do? What do they connect to?
|
muscle spindles, specialized nerve endings embedded in skeletal muscle, maintain muscle tone, help us maintain our body's equilibrium and posture, nerve fibers connect these muscle spindles to the central nervous system (CNS)
|
|
|
What are specialized nerve endings embedded in skeletal muscle?
|
muscle spindles.
|
|
|
What do HDL and LDL stand for?
|
High and low density lipoprotein
|
|
|
How is body comp defined in the health focus on exercise exercise exercise?
|
The porportion of protein to fat.
|
|
|
in the health focus on exercise exercise exercise, What promotes the activity of osteoclasts in women? What promotes the activity of osteoblasts in men and women
|
decreased levels of estrogen, exercise!
|
|
|
How does exercise prevent weight gain in the health focus on exercise exercise exercise?
|
because the level of activity increases, muscles metabolize faster than other tissues, as a person become more muscular the body is less likely to accumulate fat.
|
|
|
in the health focus on exercise exercise exercise, when is a good time to exercise to help you sleep better at night?
|
In the late afternoon.
|
|
|
What type of exercise is needed to lower the risk of heart atack?
|
moderate exercise
|
|
|
Amount purpose organized group family
Age group: 7-12 13-18 19-55 |
viorous activity 1-2 hours daily
free play build motor skills enjoy more exercise outside of PE participate in family outings Vigorous activity 1 hr, 3-5 days a week; otherwise, 1/2 hr daily moderate activity build muscle with calisthenics continue team sports dancing hiking or swimming tennis, swimmijng, or horseback riding Take active vacations: hike bike, or X-country ski Vigorous activity 1 hr 3 days a week, otherwise 1/2 hr daily moderate activit Exercise to prevent lower back pain: aerobics, stretching, or yoga control buildup of fat cells running club, bike club, or outing group initiate family outings: bowling boating, camping or hinking |
|
|
What is the purpose of exercise with teenagers 13-18?
|
build muscle with calisthenics.
|
|
|
Over-exercise in females can lead to what? What is another way this could happen?
|
amenorrhea and anorexia nervosa
|
|
|
What is another name for anabolic steroid use?
|
performance-enhancing steroids
|
