MDCAT Biology MCQs

Lymphatic capillaries collect excess interstitial fluid.
Lymph eventually drains into large veins.

Calcium changes the troponin-tropomyosin complex.
Tropomyosin moves away from actin binding sites.

Lymphatic capillaries collect excess interstitial fluid.
Lymph eventually drains into large veins.

Calcium changes the troponin-tropomyosin complex.
Tropomyosin moves away from actin binding sites.

Smoke irritates airways and impairs ciliary beating.
Mucus and microbes are then cleared less effectively.

Arthritis causes joint pain, stiffness and impaired movement.
Different forms have inflammatory or degenerative causes.

Smoke irritates airways and impairs ciliary beating.
Mucus and microbes are then cleared less effectively.

Arthritis causes joint pain, stiffness and impaired movement.
Different forms have inflammatory or degenerative causes.

Smoke irritates airways and impairs ciliary beating.
Mucus and microbes are then cleared less effectively.

Arthritis causes joint pain, stiffness and impaired movement.
Different forms have inflammatory or degenerative causes.

Alveolar walls break down and elastic recoil decreases.
The effective respiratory surface becomes smaller.

Rising ventricular pressure closes the atrioventricular valves.
This produces the first heart sound and prevents backflow to atria.