Fill in the blank: Muscles create ________ to resist and stabilize movements.

Fill in the blank: Muscle activity generates ________, helping regulate body temperature.

Fill in the blank: The property of muscle that responds to nerve signals is called _________.

Fill in the blank: The property of muscle that allows it to shorten to produce movement is called _________.

Fill in the blank: The property of muscle that allows it to return to resting length after stretching is called _________.

Muscle only pulls, never pushes.

Fill in the blank: The prime mover responsible for a specific movement is called the _________.

Fill in the blank: The muscle that opposes the action of the agonist is called the _________.

Fill in the blank: Muscles that assist the agonist are called _________.

Fill in the blank: The proximal, stable attachment point of a muscle is called the _________.

Fill in the blank: The distal, movable attachment point of a muscle is called the _________.

Fill in the blank: Muscle is divided into smaller bundles called _________.

Fill in the blank: Each fascicle contains muscle cells (fibers), which contain _________.

Fill in the blank: The smallest contractile unit within myofibrils, composed of actin and myosin, is called the _________.

Fill in the blank: According to the _________, myosin binds to actin, sliding it to shorten the muscle and cause contraction.

Fill in the blank: ________ is the process where motor neurons release neurotransmitters at the neuromuscular junction, causing muscle contraction.

What enables the formation of cross-bridges between actin and myosin?

Fill in the blank: Myosin heads pull actin filaments during the ________.

ATP is required for both contraction and relaxation of muscles.

Fill in the blank: Troponin and tropomyosin block the binding of actin and myosin, halting contraction during ________.

Which energy source is used for immediate energy in muscle activity?

Fill in the blank: ________ supplies energy for short bursts of activity in muscles.

Glycolysis is an anaerobic process that breaks down glucose to produce ATP for up to how many minutes?

Fill in the blank: Long-term energy production using oxygen occurs in mitochondria and is called ________.

After exercise, the body needs to restore oxygen levels to metabolize lactic acid and replenish ATP stores. This is known as ________.

Which type of muscle contraction changes muscle length while producing force?

Fill in the blank: Muscle shortens during a ________ contraction.

Fill in the blank: Muscle lengthens during a(n) ________ contraction.

Isometric contraction produces tension without changing muscle length.

Fill in the blank: One neuron and all muscle fibers it controls is called a ________.

Fill in the blank: More motor units activated equals greater force. This is known as ________.

Higher frequency of stimulation increases force in muscle contraction.

What is the all-or-nothing principle in muscle fibers called?

Which type of muscle fiber uses aerobic respiration and is suited for endurance activities?

Fill in the blank: Slow-twitch fibers are rich in _______ and myoglobin.

Which type of muscle fiber is anaerobic and produces quick, powerful contractions?

Strength training leads to increased muscle size (myofibril growth).

Endurance training leads to increased blood supply and mitochondrial development, but little size increase.

Where is cardiac muscle found?

Smooth muscle is involuntary and found in the walls of hollow organs.

Fill in the blank: Muscular dystrophy is a genetic disorder leading to muscle _______ and weakness.

What is the bacterial infection that causes sustained muscle contraction?

What is often caused by dehydration, ion imbalances, or muscle fatigue?

What are muscle tears due to overstretching, often when muscles are under load called?

What is the inflammation of muscle connective tissue that is slow to heal called?

Which function of blood involves carrying nutrients, hormones, waste, and oxygen (O₂)?

Which function of blood maintains body temperature, water volume, and pH levels?

Which function of blood protects against infections and injuries using leukocytes and platelets?

What is the percentage of blood volume made up by erythrocytes (red blood cells) called?

What is the layer containing leukocytes (white blood cells) and platelets called?

What is composed of 90% water and various molecules in the blood?

Which plasma protein is the most common and is important for transport?

Which plasma protein is important for cholesterol transport and immunity?

Which plasma protein is crucial for blood clotting?

Blood is thicker than water and makes up about ___% of body weight.

What color is blood when it is oxygenated?

What is the most common cell in the body?

What is the lifespan of erythrocytes (red blood cells)?

Where are erythrocytes produced?

Hemoglobin is composed of four proteins, each containing what element?

What percentage of carbon dioxide is bound by hemoglobin?

What is the normal hematocrit level range for males?

What hormone is produced by the kidneys in response to low oxygen levels?

What is the practice of injecting blood or EPO to increase work capacity called?

Leukocytes are produced in the bone marrow, and some enter which system?

What are the two main types of leukocytes?

Which type of leukocyte is the first responder against bacteria?

Which leukocyte fights parasites and helps with allergic reactions?

Which leukocyte is rare and releases histamine in inflammatory responses?

Which agranular leukocyte differentiates into macrophages outside the bloodstream?

Which agranular leukocyte includes T and B cells important for immunity (memory cells)?

What is the origin of platelets (thrombocytes)?

What is the typical lifespan of platelets?

Which step in the clotting process reduces blood loss?

During which step of the clotting process do platelets adhere to the vessel wall and trap other cells?

What is the final step in the clotting process where a series of chemical reactions form a fibrin mesh?

Which blood types are inherited from parents according to the ABO system?

What does the Rh factor indicate on red blood cells?

Which blood type is considered the universal recipient?

What is blood poisoning (septicemia)?

What is the cause of mononucleosis?

Which type of anemia is most common?

What type of anemia is due to blood loss?

Which type of anemia is caused by lack of vitamin B12?

What is hemolytic anemia?

Leukemia is a cancer causing overproduction of which blood cells?

Multiple myeloma is a cancer causing overproduction of which cells?

Thrombocytopenia is a reduction in which blood component, leading to excessive bleeding?

Which layer of large vessel walls is made of squamous cells and allows smooth blood movement?

Which layer of large vessel walls is the thickest in arteries and maintains contraction?

Which layer of large vessel walls is made of collagen and anchors the vessel?

What is the function of arteries?

What are arterioles? Fill in the blank: Arterioles are ______ than arteries and regulate blood flow into capillaries.

What is the function of capillaries? Fill in the blank: Capillaries are the smallest vessels with thin walls for ______ and waste exchange.

What do venules allow? Venules are small veins that allow ______ to leave the vessel.

What is the function of veins? Fill in the blank: Veins carry blood to the ______, have low pressure, larger lumen, and contain valves.

Where is the heart located? Fill in the blank: The heart is located in the ______ cavity, protected by bones and the pericardium.

Which of the following is the inner layer of the heart?

Which layer of the heart is made of thick muscle?