I "lub" you
The valve found between the right atria and ventricle.
Gas exchange between the blood and body tissues.
Internal respiration
The neurotransmitter found at the neuromuscular junction.
Acetylcholine
The smallest and thinnest blood vessels.
Capillaries
This muscle, found between the ribs, helps with inspiration.
External intercostals
Inner layer of the heart wall.
Endocardium
The structure representing the last portion of the conducting zone.
In a sarcomere, this protein (myofilament) appears dark in colour.
Myosin
The blood vessels that carry blood away from the heart.
Arteries
Two antagonists of rectus femoris.
Hip extensors - gluteus maximus, hamstrings group
Knee flexors - hamstrings group (biceps femoris, semitendinosus, semimembranosus), sartorius
Bundle of His
Starting at the laryngopharynx, list the next 3 structures air passes through.
Larynx - trachea - main (primary) bronchi
A fascicle is composed of bundles of these.
Muscle fibers
Three structures/processes that promote venous return.
1. One-way valves
2. Skeletal muscle pump
3. 'Respiratory' pump
Anterior deltoids, long head biceps brachii, coracobrachialis
The __________, known as the 'heart strings' attach to the ________ valves via the _________ muscles.
chordae tendineae, atrioventricular, papillary
_____, created by goblet cells, helps to trap debris in the lungs while _______ help to move this debris out of the respiratory tract.
Mucous, cilia
The organelle that acts as a storage site for calcium.
Sarcoplasmic reticulum
On an ECG, what the QRS wave represents.
3 main layers of the abdominal wall that form the rectus sheath (from superficial to deep).
External oblique, internal oblique, transversus abdominis
The heart receives oxygenated blood from these arteries (name 4). Deoxygenated blood from the heart is drained by this main vein.
Arteries: anterior & posterior interventricular a's, marginal a., circumflex a.
Vein: coronary sinus
During exhalation, lung volume ______ and pressure _______. Movement of air from _____ to ____ pressure reflects the principle of _______ law.
decreases, increases
high, low
Boyle's
The ions that trigger sliding of the muscle filaments. These ions attach to _______, promoting a change in position of __________.
Calcium, troponin, tropomyosin
The volume of blood (mL) ejected from each ventricle during contraction.
Stroke volume
Gastrocnemius - ankle PF, knee FLEX
Soleus - ankle PF