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The neurotransmitter used by the nervous system to activate skeletal muscle cells is acetylcholine. (True/False)
Muscle contraction will always promote movement of body parts regardless of how they are attached. (True/False)
The enamel found on teeth is heavily mineralized with calcium salts and comprises the hardest substance within the entire body. (True/False)
The protein molecule must be digested by enzymes secreted by _____.
Pancreas, Small Intestine, and Stomach
The products of protein digestion enter the bloodstream largely through cells lining ____.
The small intestine
The small intestine is said to be "small because it is shorter in length than the large intestine. (True/False)
When the ventricles contract, the left A-V valve prevents blood from flowing from the _____.
Left ventricle to the left atrium
The common route for blood flow is heart -> arteries -> arterioles -> capillaries -> venules -> veins -> heart. There are exceptions to this route, notable protal systems and anastomoses. In a portal system blood flows from one _____ to another, while in the anastomoses blood flow from one _____ to another.
Capillary bed; artery or vein
In reporting blood pressure, the first number (upper) is the _1_ pressure and represents ventricular _2_.
Exchange of both oxygen and carbon dioxide through the respiratory membrane occurs by __?__.
The respiratory movement representing the total amount of exchangeable air is the __?__.
The general term for inadequate oxygen delivery to body tissues regardless of the cause is called hypoxia. (True/False)
Which of the following correctly traces the route of air flow in the respiratory tract?
pharynx → larynx → trachea → bronchi → bronchiole
Lymph fluid exits a lymph node at the indented hilus region via afferent lymphatic vessels. (True/False)
The ion that creates an osmotic and electrical gradient that drives the reabsorption of water and other solutes is
The nonselective, passive process performed by the glomerulus that forms blood plasma without blood proteins is called
In contrasting urine and filtrate by the time it reaches the collecting ducts, it could be said that:
filtrate contains almost everything that blood plasma does
The diploid number of chromosomes in a human skin cell is 46. The number of chromosomes found in a human egg cell is
The hormone secreted in increasing amounts during puberty that causes the sperm to mature is _?_.
The journey of the oocyte through the uterine tubes to the uterus following ovulation normally takes:
A- Sinoatrial node (SA Node)
B- Atrioventricular node (AV Node)
C- Atrioventricular bundle (Bundle of His)
D- Bundle Branches
E- Purkinje Fibers
A- Air in respiratory passages that does not contribute to gas exchange.
B- Amount of air that can be exhaled (forcibly) after a normal exhalation.
D- Gas volume that allows gas exchange to go on continuously
E- Respiratory volume inhaled or exhaled during normal breathing.
F- Respiratory volume inhaled or exhaled during normal breathing.
A- The lymph duct is indicated by letter _?_.
B- A lymph node is indicated by letter _?_
C- Lymphatic collecting vessels are indicated by letter _?_.
D- A lymph capillary is indicated by letter _?_
E- Blood capillaries are indicated by letter _?_
Barriers to infection
A- Provide chemical barriers in the stomach
B- Have antimicrobial activity. Found in tears
C- Provide mechanical barrier in internal organs.
D- Entraps microorganisms entering the respiratory passages
E- Provide chemical barriers by attaching to foreign cells.
F- Have antimicrobial activity. Found in oil.
G- Provide mechanical barrier in externally.
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